This is the 2011 fee schedule from OSU’s Soil, Water, and Forage Analytical Laboratory.

This fact sheet describes how to eliminate bermudagrass from future vegetable fields using a sorghum-sudangrass cover crop.

This presentation discusses the management of soil fertility under organic regulations.

This handout discusses points to consider when blending organic fertilizers. It contains several tables of nutrient contents of different organic fertilizers.

Extensive bibliography, step-by-step outline, and list of common materials giving carbon:nitrogen ratio for each.