This free online tool compares the nutrient value and cost of cover crops, organic and synthetic fertilizers and compost. Use this Calculator to develop well balanced and cost effective nutrient management programs for your farm. Developed by Nick Andrews, Dan Sullivan, Jim Julian and Kristin Pool.
The OSU Organic Fertilizer and Cover Crop Calculator is a tool to assist with preplant nitrogen (N) input decisions. It forecasts the quantity of plant-available nitrogen (PAN) provided by inputs such as fresh organic materials, cover crop residues, and finished compost. The calculator is an Excel-based worksheet available for free download via the OSU … Read the rest
This publication assists western Oregon farmers and agricultural professionals in determining the nitrogen fertilizer replacement value of winter cover crops. Includes information on plant-available nitrogen (PAN) basics; a site-specific, step-by-step method to estimate PAN; Willamette Valley case studies; and appendices summarizing Willamette Valley cover crop research that supports these PAN estimates.
This project has three major objectives: 1) improve cover crop selection and management, 2) support nutrient management decisions on vegetable farms, and 3) enhance cover crop and nutrient management outreach and networking among farmers in the Tualatin Soil and Water Conservation District. We are working with five farms in year one, seven farms in year two and nine farms in year three of the project. This project is funded by the Tualatin Soil & Water Conservation District.… Read the rest