Effect of Nitrogen Rate and Row Spacing on Sweet Corn Yield and Residual Soil Nitrogen (1996)

Introduction

Vegetable growers in the Willamette Valley use high rates of nitrogen fertilizers, often exceeding 250 to 300 pounds actual N/acre per season. While growers believe that these rates are necessary to achieve maximum yields and quality, a considerable portion of the applied fertilizer is not taken up by the crop. This has raised concerns that the remaining N may be contributing to nitrate pollution of groundwater. Improved efficiency of nitrogen management may be possible if the fertilizer could be placed for maximum contact with the root system.

Using Cover Crops to Control Mold in Snapbeans (1998)

Research report from OSU's North Willamette Research and Extension Center

Delbert Hemphill
OSU Dept of Horticulture

Mary Powelson
OSU Dept of Botany and Plant Pathology

Introduction

Effects of Spacing and N Rate on Edamame (1998)

Introduction

Using Winter Cover Crops to Provent Nitrogen Pollution (1998)

Research report from OSU's North Willamette Research and Extension Center

Delbert Hemphill
OSU Dept of Horticulture, NWREC

John Selker
OSU Dept of Biological and Ecological Engineering

Richard Dick
OSU Dept of Crop and Soil Science

Introduction

Nitrogen Management in Sweet Corn (1998)

Introduction

Effect of Spacing, Inoculation and N Rate on Edamame (2000)

Introduction

The effects of Spacing and Variety on Beet Production (2000)

North Willamette Research and Extension Center report

Delbert Hemphill
OSU Dept. of Horticulture

Dan McGrath
OSU Dept. of Horticulture

Introduction

Nitrogen Management in Sweet Corn (2000)

Introduction

Oregon Vegetable Digest. Vol. 31 No. 2, 1982

* Green beans tested for yield and quality * Muskmelons tested at Medford

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