Soft white winter wheat is grown in western Oregon and requires a spring application of nitrogen (N) fertilizer for optimum production. Determining the amount of N to apply has been a challenge for growers. Wheat obtains N from two sources: soil and fertilizer. Both available and mineralizable N can be...
Many nutrients and lime are not mobile in the soil. When applied to the soil surface without tillage, these materials remain in the top 2 inches, especially in production systems that lack tillage. If a soil sample is taken at a standard 8-inch depth, the top 1 to 2 inches,...
This is a fertilizer guide for commercial wholesale nurseries that produce shade and flowering trees for bareroot sales. Reviewed October 2010. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog