Clinton Shock
Director and Professor, Crop Research, Irrigation Management, Watershed Stewardship

Current Work Focus:

Production of onions, potatoes, and specialty crops using precision irrigation. Lead the research program on environmental issues including erosion control, excessive nutrient losses in surface water runoff, and groundwater contamination with nitrate and Dacthal breakdown products. Effectively participated in a cooperative team effort to correct environmental problems in the County.

Malheur Experiment Station
Department of Crop and Soil Science
595 Onion Ave.
Ontario, OR 97914
United States
(541) 889-2174

Research

Clint’s contributions to horticulture include scientific research and extension that has had a broad impact not only locally, but nationally and globally.  His primary focus on addressing issues of critical importance to growers has resulted in solutions with global as well as local impacts.  Clint’s priorities have been shaped by growers needs rather than by a single commodity or academic discipline.

Potato, contributions to horticulture include
When potato growers in Malheur County, Oregon, faced processing product quality problems in the early 1980s, Clint found that the “sugar ends” were related to water stress, furrow irrigation, and the use of varieties with little tolerance to water stress. 

To be able to test the levels of critical stress Clint ran extensive field evaluations of over a dozen types of soil moisture sensors.  He determined that granular matrix sensors (GMS), particularly the Watermark® sensor had readings that closely reflected differences in potato quality.  The GMS were particularly amenable for use in automated, replicated irrigation research with small incremental differences in irrigation criteria.  This pioneering work for use in research was recognized by the American Society of Agronomy in 2007. 
Using GMS sensors and precision irrigation, Clint found that by carefully managing irrigation and measuring soil moisture, he was able to determine the point of soil moisture that was the threshold for the development of “sugar-ends” under different irrigation systems, research that was applicable to potatoes in many Pacific Northwest locations.

As potato producers have made better use of irrigation scheduling and adopted sprinkler irrigation, Oregon growers regained acres lost due to sugar-ends.  Less water was lost to runoff from sprinkler-irrigated fields and N fertilizer use was improved.  Clint’s solutions to the “sugar end” problem were recognized by the Oregon Potato Commission and Oregon State University in 2003.  Integrated with this effort, Clint has actively participated in a team of Pacific Northwest researchers who have bred, selected, and released 21 new potato varieties including many that are less prone to sugar ends.

GMS use 
Clint introduced the use of GMS sensors and precision irrigation in his other research. Using these sensors, he developed optimal soil water potential recommendations for local potato and onion crops under different types of irrigation.  He is frequently consulted by individuals in other parts of the country and in other countries on how the technology could be applied to their situations, both for scientific research and field applications.

The GMS are feasible to use on family farms.  Following practices introduced by Clint, many growers have installed sensors in their fields to more precisely irrigate crops, particularly onions.  The variations in GMS reading closely corresponded to variations in potato and onion yield and internal quality.  Imprecise irrigation has substantial economic and environmental consequences from either over irrigation or deficit irrigation of water stress sensitive horticultural crops.  Using these GMS, growers have avoided unnecessarily frequent irrigations, saving water, and reducing downstream contamination.

Onion, drip irrigation, and groundwater
Growers faced the possibility of crippling restrictions from groundwater contamination from nitrate and DCPA residues that might be related to over irrigation and fertilization of onion and onion herbicide use.  Using optimal soil water potential and precision irrigation, Clint tested drip, sprinkler, and furrow irrigation for onion production.  He demonstrated that onions grown under drip irrigation had improved yield and quality with lower inputs of water and N fertilizer than furrow irrigation.  Results of the onion trials have been widely adopted by growers locally, in other production regions, and overseas.  Clint encouraged the use of herbicide alternatives to DCPA.

To find options for growers to make N fertilizer more efficient, Clint tested many nitrogen fertilization options for sugar beets, potatoes, onions, and wheat under different irrigation systems.  Nitrogen rates could be reduced for furrow- and drip-irrigated onion and for furrow- and sprinkler-irrigated potato.  Growers have modified their fertilizer practices using less N and more efficient timing, including split applications of N.  Growers are substituting sprinkler irrigation for surface flood irrigation of crops other than potatoes and onions.  Groundwater nitrate and DCPA residue contamination are decreasing through voluntary adoption of innovative practices.  These accomplishments have been recognized by the Oregon Department of Agriculture in 2008, the Hornaday Gold Metal in 2011, and the Onion Hall of Fame in 2012.

Specialty crops
Clint has done innovative research on Stevia rebaudiana (Stevia), Eriodictyon californicum (California Yerba Santa), several pharmaceutical crops, and native wildflower seed production.  Stevia selections with 16-19 % rebaudioside A have been identified.  He has identified cultural practices and superior genetic materials (> 10% leaf dry matter antioxidant content) for California Yerba Santa.  He is currently working on several pharmaceutical crops.  Native wildflower seed production research is being conducted for the Bureau of Land Management and the US Forest Service for use in revegetation following fires.  Using the cultural practice he has identified, some growers are producing seed.

Amazon revegetation
In the early 1970’s land and vegetation in the Amazon and other sensitive areas of Brazil were being disturbed at an accelerating rate along roads, construction sites and other locations resulting in radical erosion with no spontaneous healing.  These opening sores in the landscape were easily created where the rainfall is high and the soil is very shallow and the subsoil is highly acid and infertile.

Vigorous vegetation could stop erosion and legumes could help provide nitrogen on a regular basis to help stimulate new sod and soil formation.  Clint collected native and introduced species. Species were tested for effectiveness of revegetation individually and in mixtures.  Essential nutrient corrections and planting methods were determined.  Tropical legumes capable of fixing nitrogen and growing vigorously in very acid, infertile soils were identified to provide a continuous nitrogen supply.  Species were discovered that grew well including legumes that had not been previously used in tropical agriculture.  Vigorous vegetation was established and this vegetation has evolved through the present towards a natural native composition.  Research reports and a practical manual were written, allowing wide knowledge of effective practices.  Many legume collections were made and shared with germplasm banks in Brasilia and elsewhere. Detailed observations of natural plant succession, soil formation, and soil retention were made in 2013 confirming the early successes.  New journal articles are being prepared.
 

Teaching

I accept graduate students for Horticulture, Crop and Soil Science, and Water Resources. 

Biography

Education:

B.A., Mathematics, University of California, 1966
M.S., Horticulture, University of California, 1973
Ph.D., Plant Physiology, University of California, 1982

Societies and Affiliations:

American Society of Horticultural Science, 1993 - present. 

  • Editorial Board of HortScience, 2009-Present. 
  • Associate Editor HortScience, 2000-2003.
  • Consulting Editor HortScience, 2004-present.
  • Member of the American Society of Horticultural Science publication committee, 2008-9.

American Society of Agronomy, 1981 - present. Chair of Division A-7, 2004-2005.
American Society of Agricultural Engineers, 2000-present.
American Association for the Advancement of Science, 1981 - present.
American Society of Plant Biologists, 1981 - present.
Crop Science Society of America, 1981 - present.
Soil Science Society of America, 1981 - present.
Society for Range Management, 1981 - present.
Sigma Xi Scientific Research Society, 1981 - present.
Potato Association of America, 1986 - present. Physiology Section Director, 2003-2004.
National Onion Association, 1987 - present.
 

I accept graduate students for Horticulture
I accept graduate students for Crop and Soil Science

Publications

Refereed Publications since 1999

Hughes, R. M., S. Dunham, K.G. Maas-Hebner, J.A. Yeakley, C.B. Schreck, M. Harte, N. Molina, C.C. Shock, V.W. Kaczynski and J. Schaeffer. 2014. A review of urban water body rehabilitation and mitigation challenges and approaches: 1. Rehabilitation and remediation. Fisheries 39:18-29.

Hughes, R. M., S. Dunham, K.G. Maas-Hebner, J.A. Yeakley, C.B. Schreck, M. Harte, N. Molina, C.C. Shock, V.W. Kaczynski and J. Schaeffer. 2014. A review of urban water body challenges and approaches: 2. Mitigating effects of future urbanization. Fisheries 39:30-40.

Lima, L.A., W.F. de Almeida, P.L.T. Lima, E.C. Oliveira, and C.C. Shock. 2013. Germination and early growth of physic nut under levels of salinity. Eng. Agríc., Jaboticabal, v.33, n.6, p.1110-1123.

Shock, M.P., C.C. Shock, E.B.G. Feibert, N.L. Shaw, L.D. Saunders, and R.K. Sampangi. 2012. Cultivation and irrigation of fernleaf biscuitroot (Lomatium dissectum) for Seed Production. HortScience 47(10):1525-1528.

Shock, C.C. and C.B. Shock. 2012. Research, extension, and good farming practices improve water quality and productivity. Journal of Integrative Agriculture 11(1):14-30.

Vales, M.I. C. R. Brown, S. Yilma, D. C. Hane, S. R. James, C. C. Shock, B. A. Charlton, E. Karaagac, A. R. Mosley, D. Culp, E.B.G. Feibert, J. C. Stark, M. J. Pavek, N. R. Knowles, R. G. Novy, and J. L. Whitworth. 2012. Purple Pelisse: a specialty 'fingerling' potato with purple skin and flesh and medium specific gravity. Am. J. Pot. Res. 89:306-314.

Brown, C.R., I. Vales, S. Yilma, S. James, B. Charlton, D. Culp, D. Hane, C. Shock, E. Feibert, M. Pavek, R. Knowles, R. Novy, J. Whitworth, J. Stark, JC Miller Jr, D. Holm, R. Quick, R. Navarre. 2012.  “AmaRosa,” a red skinned, red fleshed fingerling with high phytonutrient value. Amer J Potato Res. 89: 249-254.

Yilma, S., M. I. Vales, B.A. Charlton, D.C. Hane, S.R. James, C.C. Shock, A.R. Mosley, D. Culp, E. Feibert, L. Leroux, E. Karaagac, N.R. Knowles, M.J. Pavek, J.C. Stark, R.G. Novy,  J.L. Whitworth, J.J. Pavek, D.L. Corsini, T.L. Brandt, N. Olsen, and C.R. Brown. 2012. Owyhee Russet: a variety with high yields of U.S. No. 1 tubers, excellent processing quality, and moderate resistance to fusarium dry rot (Fusarium solani var. coeruleum). Am. J. Pot. Res. 89:175-183.

Wang, F.-X., X.-X. Wu, C.C. Shock, L.-Y. Chu, X.-X. Gu, X. Xue. 2011. The effects of drip irrigation regimes and plastic mulch on potato tuber yield and quality in arid Northwestern China. Field Crops Research. 122:78-84.

Shock, C.C. and F.-X. Wang. 2011. Soil Water Tension, a Powerful Measurement for Productivity and Stewardship. HortScience 46: 178-185.

*Whitworth J.L., R.G. Novy, J.C. Stark, J.J. Pavek, D.L. Corsini, S.L. Love, N. Olsen, S.K. Gupta, T. Brandt, M.I. Vales, A.R. Mosley A.R., S. Yilma, S.R. James, D.C. Hane, B.A. Charlton, C.C. Shock, N.R. Knowles, M.J. Pavek, J.S. Miller, and C.R. Brown. 2010.  Alpine Russet: A potato cultivar having long term tuber dormancy making it suitable for processing from long-term storage.  Amer J Potato Res.  ARIS #260598.

Norberg, O.S. B. Brown, and C.C. Shock. 2010. Optimizing nitrogen use for irrigated waxy barley. Crop Management. June 2010.

O’Neill, M.K.,  C.C. Shock,  K.A. Lombard, R.F. Heyduck, E.B.G. Feibert, D. Smeal, and R.N. Arnold. 2010. Hybrid poplar (Populus ssp.) selections for arid and semi-arid intermountain regions of the western United States. Agroforest Syst. 79:409–418.

Sampangi, R. K. C. Almeyda, K. L. Druffel, S. K. Mohan, C. C. Shock, and H. R. Pappu. 2009. First report of natural infection of Penstemon acuminatus with cucumber mosaic virus in the Treasure Valley region of Idaho and Oregon. Plant Disease 93,762, 2009.  

Ransom, C.V., C.A. Rice, and C.C. Shock. 2009. Yellow nutsedge (Cyperus esculentus) growth and reproduction in response to nitrogen and irrigation. Weed Science 2009 57:21–25.

Thompson, A.L., S.L. Love, J.R. Sowokinos, M.K. Thornton, and C.C. Shock. 2008. Review of the sugar end disorder in potato (Solanum tuberosum, L.). Am J Potato Res. 85:375-386.

Shock, C.C., E.B.G. Feibert, L.B. Jensen, S.K. Mohan, and L.D. Saunders. 2008. Onion variety response to iris yellow spot virus. HortTechnology. 18:539-544.

Shock, C.C. 2008. The Canon of Potato Science: 31. Irrigation. Potato Research 50: 331-333.

Mosley, A.R., S. Yilma, D.C. Hane, S.R. James, K.A. Rykbost, C.C. Shock, S.L. Love, D.L. Corsini, J.J. Pavek, R E. Thornton, B.A. Charlton, E.P. Eldredge, R.G. Novy, M.J. Pavek, N.R. Knowles, J.L. Whitworth, C.R. Brown, J.C. Stark and M.I. Vales. 2008. Willamette: a chipping cultivar with high yield and specific gravity, low incidence of hollow heart and brown center, and suitability for fresh-market usage. Am J Potato Res. 85:85-92.

Novy, R.G., J.L. Whitworth, J.C. Stark, S.L. Love, D.L. Corsini, J.J. Pavek, M.I. Vales, S.R. James, D.C. Hane, C.C. Shock, B.A. Charlton, C.R. Brown, N.R. Knowles, M.J. Pavek, T.L. Brandt, and N. Olsen. 2008. Premier Russet: A dual-purpose, potato cultivar with significant resistance to low temperature sweetening during long-term storage. Am J. Potato Res. 85:198-209.

Pereira, A.B., C.C. Shock, B.G. Feibert, and N.A.Villa Nova. 2008. Performance of "Irrigas" for onion irrigation scheduling compared to three soil water sensors. Engenharia Rural. 18:109-114.

Shock, C.C., A.B. Pereira, B.R. Hanson, and M.D. Cahn. 2007. Vegetable irrigation. p. 535--606. In R. Lescano and R. Sojka (ed.) Irrigation of agricultural crops. 2nd ed. Agron. Monogr. 30. ASA, CSSA, and SSSA, Madison, WI.

Shock, C.C., A.B. Pereira, and E.P. Eldredge. 2007. Irrigation Best Management Practices for Potato. In C. Rosen and M. Thornton (Eds.). Symposium on Best Management Practices for Nutrients and Irrigation: Research, Regulation, and Future Directions. Amer. J. Potato Res. 84:29-37.

Neufeld, J.D., S.J. Reddy, J.S. Miller, C.A. Shock, L. Jensen, N.L. Olsen, W. Bohl, B. Hopkins, C.C. Shock. 2007. Rapid delivery of regional pest alerts using an interactive internet site, Journal of Extension. October 2007, Volume 45, Number 5. Article Number 5IAW5.

Shock, C.C., E.B.G. Feibert, L.D. Saunders, and J. Klauzer. 2007. Deficit irrigation for optimum alfalfa seed yield and quality. Agron J. 99:992-998.

Villa Nova, N.A., A.B. Pereira, and C.C. Shock. 2007. Estimation of reference evapotranspiration by an energy balance approach. Biosystems Engineering 96:605–615.

Shock, C.C., E.B.G. Feibert, and L.D. Saunders. 2007. Short duration water stress produces multiple center onion bulbs. HortScience. 42:1450-1455.

Strausbaugh, C.A., Gillen, A.M., Shock, C.C., and Eldredge, E.P. 2006. Evaluation of commercial sugar beet hybrids for resistance to beet curly top in Malheur County, OR, 2005. Biological and Cultural Tests for Control of Plant Diseases (online.) Report 21: FC039. DOI: 10.1094/BC21. The American Phytopathological Society, St. Paul, MN.

Novy, R.G., S.L. Love, D.L. Corsini, J.J. Pavek, J. Whitworth, A.R. Mosley, S.R. James, D.C. Hane, C.C. Shock, K.A. Rykbost, C.R. Brown, R.E. Thornton, N.R. Knowles, M. Pavek, N. Olsen, and D.A. Inglis. 2006. Defender: A high-yielding, processing potato cultivar with foliar and tuber resistance to late blight. Amer. J. Potato Res. 83:9-19.

Pereira, A.B., and C.C.Shock. 2006. Development of irrigation best management practices for potato from a research perspective in the United States. Sakia.org e-publish 1(1):1-20.

Shock, C.C., E.B.G. Feibert, and L.D. Saunders. 2005. Single centered and super colossal bulbs from yellow onion cultivars. HortTechnology. 15:399-408.

Shock, C.C., E.B.G. Feibert, and L.D. Saunders. 2005. Onion response to drip irrigation intensity and emitter flow rate. HortTechnology. 15:652-659.

Shock, C.C., E.B.G. Feibert, and L.D. Saunders. 2004. Plant population and nitrogen fertilization for subsurface drip-irrigated onion. HortScience. 39(7):1722-1727.

Eldredge, E.P., C.C. Shock, and L.D. Saunders. 2003. Early and late harvest potato cultivar response to drip irrigation. In Yada, R.Y. (eds) Potatoes - Healthy Food for Humanity. Acta Horticulturae. 619:233-239.

Shock, C.C., E.B.G. Feibert, L.D. Saunders, and S.R. James. 2003. Umatilla Russet and Russet Legend potato yield and quality response to irrigation. HortScience. 38:1117-1121.

Novy, R.G., D.L. Corsini, S.L. Love, J.J. Pavek, A.R. Mosley, S.R. James, D.C. Hane, C.C. Shock, K.A. Rykbost, C.R. Brown, and R.E. Thornton. 2003. Alturas: a multi-purpose russet potato cultivar with high yield and tuber specific gravity. Amer. J. Potato Res. 80:295-301.

Shock, C.C., 2003. Soil water potential measurement by granular matrix sensors. In Stewart, B.A. and Howell, T.A. (eds) The Encyclopedia of Water Science. Marcel Dekker. p 899-903.

Feibert, E.B.G., C.C. Shock and L.D. Saunders. 2003. Non-conventional additives leave onion yield and quality unchanged. HortScience. 38:381-386.

Rykbost, K.A., S.R. James, A.R. Mosley, B.A. Charlton, D.C. Hane, C.C. Shock, R. Voss, R.H. Johansen, S.L. Love, and R.E. Thornton. 2003. Modoc: A potato variety with bright red skin and early maturity for fresh market. Amer. J. Potato Res. 80:235-240.

Hane, D.C., A.R. Mosley, S.R. James, K.A. Rykbost, C.C. Shock, S.L. Love, D.L. Corsini, J.J. Pavek, R.E. Thornton, B.A. Charlton, E.P. Eldredge, and S. Yilma. 2003. Wallowa Russet: a full season long russet for processing and fresh market. Am J Potato Res. 80:289-294.

Shock, C.C. and E.B.G. Feibert. 2002. Deficit irrigation of potato. In P. Moutonnet (ed) Deficit Irrigation Practices. Food and Agriculture Organization of the United Nations, Rome. Water Reports 22:47-55.

Mosley, A., K. Rykbost, S. James, C. Shock, B. Charlton, J. Pavek, S. Love, D. Corsini, and R. Thornton. 2001. Klamath Russet: A full-season, fresh market, long russet. Am J Potato Res. 78:377-381.

Shock, C.C., E.B.G. Feibert, L.B. Jensen. R.L. Jones, G.W. Capps and E. Gheen. 2001. Changes toward sustainability in the Malheur-Owyhee watershed. In W.A. Payne, D.R. Keeney, and S. Rao (eds). Sustainability in Agricultural Systems in Transition Proceedings, ASA Special Publication. American Society of Agronomy, Madison, WI. pp. 97-106.

Shock, C.C., E.B.G. Feibert, M. Seddigh, and L.D. Saunders. 2002. Water requirements and growth of irrigated hybrid poplar in a semi-arid environment in Eastern Oregon. Western Journal of Applied Forestry. 17:46-53.

Shock, C.C., E.B.G. Feibert, L.D. Saunders, and M. Seddigh. 2002. Initial growth of irrigated hybrid poplar decreased by ground covers. Western Journal of Applied Forestry. 17:61-65.

Novy, R.G., D.L. Corsini, S.L. Love, J.J. Pavek, R.L. Mosley, S.R. James, D.C. Hane, C.C. Shock, K.A. Rykbost, C.R. Brown, and R.E. Thornton. 2002. Bannock Russet: A dual purpose, russet potato variety notable for its high U.S. No. 1 yield and multiple disease resistances. Am J Potato Res. 79:147-153.

Shock, C.C., J.K. Ishida, E.P. Eldredge, and M. Seddigh. 2000. Yield of yellow onion cultivars in eastern Oregon and southwestern Idaho. HortTechnology. 10:613-620.

Mosley, A.R., S.R. James, K.A. Rykbost, D.C., Hane, C.E. Stanger, C.C. Shock, et al. 2000. Century Russet: A high yielding fresh market cultivar with Verticillium resistance. Am J Potato Res. 77:161-165.

Mosley, A.R., James, S.R., Shock, C.C., Hane, D.C., Rykbost, K.A., Charlton, B.A., Holm, D.G., Love, S.L., Corsini, D.L., Pavek, J.J. and Thornton, R.E. 2000. Russet Legend: A full season long russet for processing and fresh market use. Am J Potato Res. 77:77-81.

Mosley, A.R., James, S.R., Hane, D.C., Rykbost, K.A., Shock, C.C., Charlton, B.A., Pavek, J.J., Love, S.L., Corsini, D.L. and Thornton, R.E. 2000. Umatilla Russet: A full season long russet for processing and fresh market use. Am J Potato Res. 77:83-87.

Shock, C.C., M. Seddigh, L.D. Saunders, T.D. Stieber, and J.G. Miller. 2000. Sugarbeet nitrogen uptake and performance following heavily fertilized onion. Agron. J. 92:10-15.

Shock, C. C., E. B. G. Feibert, and L. D. Saunders. 2000. Irrigation criteria for drip-irrigated onions. HortScience. 35:63-66.

Shock, C. C., E. B. G. Feibert, and L. D. Saunders. 2000. Onion storage decomposition unaffected by late-season irrigation reduction. HortTechnology. 10:176-178.

Sowokinos, J.R., C.C. Shock, T.D. Stieber, and E.P. Eldredge. 2000. Compositional and enzymatic changes associated with the sugar-end defect in Russet Burbank potatoes. Am J Potato Res. 77:47-56.

Smith, O.J.M. and C.C. Shock. 1999. Circuitry innovation for three-phase motor operation on single-phase power. Applied Engineering in Agr. 15:577-582.

Hoffman, A.M., C.C. Shock, and E.B.G. Feibert. 1999. Taxane and ABA production in yew under different soil water regimes. HortScience. 34:882-885.

Shock, C.C., L.B. Jensen, J.H. Hobson, M. Seddigh, B.M. Shock, L.D. Saunders, and T.D. Stieber. 1999. Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows. HortTech. 9:251-253.

Outreach and Extension

In the late 1960’s and early 1970’s, homesteaders in the interior of Brazil (state of Mato Grosso) were prisoners to a cycle of poverty.  They had no access to a free economy due to high interest rates (10-12% per month) paid to middlemen.  In addition to conventional variety testing and extension work, Clint visualized bringing modern banking institutions using both crops and the homestead as collateral to help finance operations.  Clint developed farm plans for 52 individual poor farm families out of many thousands, and used NGO funds to deliver resources to the families at modern lending institution rates (1.5% per month) through an existing but previously non-functional poor growers’ cooperative.  Clint taught purchasing and marketing to selected members of the cooperative and helped develop commercial sources of inputs and sales.  Growers repaid 100% of their loans each of two consecutive years.  The selected farm families became more prosperous and escaped abject poverty.  Modern banking credit replaced exploitive credit as government representatives and national banking institutions observed the results and expanded loans to over a thousand homesteaders in the third year.  Money lenders mostly converted their businesses to become principally agricultural suppliers and representatives.

Of the 35 extension brochures that Clint has written dealing with methods of irrigating, precision irrigation, and cultural practices for local crops including onions, potatoes, grains, and wildflower seed crops, four are in Spanish.  Clint has maintained a website for the experiment station,  at http://www.cropinfo.net, where not only the many hundreds of annual reports of the station are posted, but there are links to other information on topics of interest to producers (American Society of Agronomy recognition in 2002).

Since there are insufficient extension agents to attend all local crop production needs in eastern Oregon and southwestern Idaho, Clint visualized developing a cooperative network to expand the ability of extension agents to reach wide audiences through an interactive Internet program.  He directed the building of the Treasure Valley Pest Alert Network (a web software program) to communicate pest control information in a timely fashion between fieldmen, extension personnel, and growers.  This has evolved into the Pacific Northwest Pest Alert Network, currently led by Jerry Neufeld of the University of Idaho.  Wasted preventive sprays are less often used by growers. See http://www.pnwpestalert.net

Fun Fact

Other Expertise:

  • Shock, C.C., F.X. Wang, R.J. Flock, E.B.G. Feibert, C.A. Shock, and A.B. Pereira. 2013. Irrigation monitoring using soil water tension. Sustainable Agriculture Techniques, Oregon State University Extension Service. EM 8900 10p.
    http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/37569/em89...
     
  • Shock, C.C. T. Welch, F.X. Wang R. Flock, E.B.G. Feibert, C.A. Shock, y A.B. Pereira. 2013. El control del riego mediante la tensión matricial del suelo. Tecnicas para la agricultura sostenible, Oregon State University Extension Service, Corvallis. EM 8900-S-E. 10p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/37648/em89...
     
  • Shock, C.C. 2013. Drip Irrigation: An Introduction. Sustainable Agriculture Techniques, Oregon State University Extension Service, Corvallis. EM 8782-E 8p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/37461/em87...
     
  • C.C. Shock y T. Welch. 2013. El riego por goteo: Una introducción. Tecnicas para la agricultura sostenible, Oregon State University Extension Service, Corvallis. EM 8782-S 9p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/37462/em87...

  • Shock, C.C., F.X. Wang, R.J. Flock, E.P. Eldredge, and A.B. Pereira. 2013 Successful potato irrigation scheduling. Sustainable Agriculture Techniques, Oregon State University Extension Service, Corvallis. EM 8911-E. 8p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/43731/em89...

  • Shock, C.C., F.X. Wang, R.J. Flock, E.P. Eldredge, and A.B. Pereira. 2013. Drip Irrigation Guide for Potatoes. Sustainable Agriculture Techniques, Oregon State University Extension Service, Corvallis. EM 8912-E. 8p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/43803/em89...

  • Shock, C.C., R.J. Flock, E.B.G. Feibert, C.A. Shock, and J. Klauzer. 2013. Drip irrigation guide for onion growers in the Treasure Valley. Sustainable Agriculture Techniques, Oregon State University Extension Service. EM 8901 8p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/43725/em89...

  • Shock, C.C., B.M. Shock, and T. Welch. 2013. Strategies for efficient irrigation water use. Sustainable Agriculture Techniques, Oregon State University Extension Service.  EM8783. 7p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/37465/em87...

  • Shock, C.C., R.J. Flock, E.B.G. Feibert, A.B. Pereira, and M. O’Neill. 2013. Drip irrigation guide for growers of hybrid poplar. Sustainable Agriculture Techniques, Oregon State University Extension Service. EM 8902 7p. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/43729/em89...

  • J.L. Harden, K.M. Foley, C.C. Shock, and T.K. Welch. 2012. Eliminating Runoff Water from Your Farm, Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 142. 5 p. http://www.cropinfo.net/EliminateRunoff.pdf

  • K.M. Foley, C.C. Shock, O.S. Norberg, and T.K. Welch. 2012. Making Strip Tillage Work for You: A Growerch. 2012. Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 140. http://www.cropinfo.net/Strip_Tillage_EXT_CrS_140.pdf

  • M.P. Shock, C.C. Shock, E.B.G. Feibert, C.A. Parris, L.D. Saunders, R.K. Sampangi, N.L. Shaw, and T.K. Welch. 2012. Fernleaf Biscuitroot, Lomatium dissectum (LODI), Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 138. 6 p. http://www.cropinfo.net/FernleafBiscuitroot.pdf

  • Foley, K.M., A.R. Doniger, C.C. Shock, D.A. Horneck, and T. Welch. 2012. Nitrate Pollution in Groundwater, Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 137. http://www.cropinfo.net/NitrateHiRes.pdf

  • Shock, C.C. and T.K. Welch. 2011. TMDLs and water quality in the Malheur Basin: A Guide for Agriculture, Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 133.  http://cropinfo.net/bestpractices/TMDLsAnd%20WaterQualityExtCrs133July2011.pdf

  • Shock, C.C. and T.K. Welch. 2011. Tailwater recovery using sedimentation ponds and pumpback systems, Sustainable Agriculture Techniques, Oregon State University, Department of Crop and Soil Science Ext/CrS 134. http://cropinfo.net/bestpractices/TailwaterRecoveryExtCrS134July2011.pdf

  • Shock, C.C. and T.K. Welch. 2011. Surge irrigation, Sustainable Agriculture Techniques. Oregon State University, Department of Crop and Soil Science Ext/CrS 135.

  • Shock, C.C., E. Feibert, L. Jensen and J. Klauzer. 2010. Successful onion irrigation scheduling, Sustainable Agriculture Techniques. Oregon State University Extension Service, Corvallis. SR 1097. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/18398/sr10...

  • Norberg, S., C. C. Shock. 2010. Growing irrigated soybeans in the Pacific Northwest. Oregon State University Extension Service. Corvallis. EM 8996.

  • Parris, C.A., C.C. Shock, E. Feibert, and N. Shaw. 2010. Sulphur-flower buckwheat - Eriogonum umbellatum (ERUM), Sustainable Agricultural Techniques: Native Plant Seed Production. Oregon State University Extension Service, Corvallis. EM 9017.

  • Iida, C.L. y C.C. Shock, El dilema del ffl ff . Tecnicas para la agricultura sostenible, Oregon State University Extensin  Service, EM 8939-S-E itenero de 2009. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/20521/em89...

  • Iida, C.L. y C.C. Shock, La poliacrilamida: Una soluciiu para la erosi l. Tecnicas para la agricultura sostenible, Oregon State University Extensin  Service, EM 8958-S-E itenero de 2009. http://extension.oregonstate.edu/catalog/pdf/em/em8958-s-e.pdf

  • Iida, C. and C.C. Shock. 2008. Make polyacrylamide work for you! Sustainable Agriculture Techniques. Oregon State University Extension Service, Corvallis. 6p. http://extension.oregonstate.edu/catalog/pdf/em/em8958-e.pdf

  • Iida, C.L. and C.C Shock. 2007. The phosphorus dilemma. Sustainable Agriculture Techniques, Oregon State University Extension Service, Corvallis. EM 8939-E. 4p. http://extension.oregonstate.edu/catalog/pdf/em/em8939-e.pdf

  • Jensen, L., and C.C. Shock. 2001 Strategies for Reducing Irrigation Water Use. Oregon State University Extension Publication EM8783. July. http://eesc.orst.edu/agcomwebfile/EdMat/html/EM/EM8783/em8783.html

  • Shock, C.C., A.B. Pereira, E.B.G. Feibert and R.J. Flock. 2006. Irrigação por goteijamento na produção de alamo; guia prático. Editora UEPG, Ponta Grossa, Parana, Brasil, ISBN: 85-86941-70 16p.

  • Pereira, A.B., C.C. Shock, E.B.G. Feibert, R.J. Flock, L.A. Lima, and N. Fernandes. 2006. Monitoramento da irrigação por meio da tensão da água do solo.  Editora UEPG, Ponta Grossa, Paraná, Brasil. ISBN: 85-86941-78-6. 20p.

  • Bassinette, J.P., R. Karow, N. Blake, K. Reinhart, R. Bafus, M. Boyle, D. Clark, E. Eldredge, P. Hayes, E. Jacobsen, J. Peterson, S. Pietre, K. Rykbost, C. Shock, and J. Smith. 2003. Spring Grain Varieties for 2003. Oregon State University Agricultural Experiment Station, Special Report 986:1-35.

  • Bassinette, J.P., R. Karow, N. Blake, K. Reinhart, R. Bafus, M. Boyle, E. Eldredge, P. Hayes, J. Peterson, S. Pietre, K. Rykbost, and C. Shock. 2003. Winter Grain Varieties for 2003. Oregon State University Agricultural Experiment Station, Special Report 775:1-26.

  • Sullivan, D.M., B.D. Brown, C.C. Shock, D.A. Horneck, R.G. Stevens, G.Q. Pelter, and E.B.G. Feibert. 2001. Nutrient Management for Sweet Spanish Onions in the Pacific Northwest. Pacific Northwest Extension Publication PNW 546. 26p.

  • Hane, D., A. Mosley, S. James, K. Rykbost, and C.C. Shock. 1997. Management guide for Umatilla Potatoes, distributed by the Oregon Potato Variety Development Project, Oregon State University Agricultural Experiment Station, Corvallis, OR.

  • Hane, D., A. Mosley, S. James, K. Rykbost, and C.C. Shock. 1997. Management guide for Legend Potatoes, distributed by the Oregon Potato Variety Development Project, Oregon State University Agricultural Experiment Station, Corvallis, OR.

  • Kleinkopf, G.E., M.D. Lewis, C.C. Shock, M.K. Thornton, R.E. Thornton, R.K. Thornton, and D.T. Westerman. 1992. Management practices and sugar end potatoes. PNW 427, 4 pp.

  • Shock, C.C., L. Jensen, T.D. Stieber, E.P. Eldredge, J.A. Vomocil, and Z.A. Holmes. 1989. Cultural Practices that decrease potato dark-ends. Potato and Onion Newsletter, Malheur County. August 1989. 3 pp.

  • Gates, R.N., B.D. Nelson, K.R. Broussard, and C.C. Shock. 1989. Evaluation of bermudagrasses in south Lousisiana on recent alluvial soil. Louisiana Agricultural Experiment Station, bulletin 813. 27 pp.

  • Shock, C.C. 1982. Experimental cultivation of Rebaudi's stevia in California. Agronomy Progress Report No. 122, University of California, Davis. 4 pp.

  • Shock, C.C. 1982. Makueni guineagrass shows potential as a summer forage or energy crop. Paper presented at the University of California Davis Agronomy and Range Science Miniconference 1981. Agronomy Progress Report No. 119, Univ. of Calif., Davis. 4 pp.