Nutrient Management Research Database
General Information
Research Title
Efficient Nitrogen Management for Cool-Season Vegetables
Link to File
Research Specifications
Crop: Broccoli, Cauliflower, Lettuce
Soil Type:
State: California
Year: 2007
Authors
Hartz, T.K.
Summary/Abstract from Original Source
Research Highlights
Design and Methods
- This guide outlines the research performed since 1990 on efficient N management practices in California cool-season vegetable production.
- The techniques covered in this guide are cost-effective, and allow for maintained crop yield and quality while reducing detrimental environmental impacts from N fertilization.
- Fertilizer N can pollute groundwater and stimulate algal growth in water bodies.
Results
- This guide has sections covering:
1) A background on current N usage and related environmental consequences.
2) The different forms of soil N, their relevance to crop N needs, and patterns in crop N demand through the course of a growing season.
3) The influence of irrigation on soil N.
- Practical recommendations are made regarding:
1) Developing crop specific N fertilization templates.
2) Modifying nutrient plans for field-specific conditions.
3) Monitoring soil and crop N status.
- This guide also includes an appendix with instructions on conducting “quick test” for in-season nitrate testing as well as petiole nitrate determination for a variety of vegetable crops.