Issues from 1953 to present. Reports news from research related to potash, phosphate, and other nutrient management.

A publication written by Iowa State University Extension and Outreach that provides information on soybean nutrient requirements.

Two part publication including crop and soil management and pest management from Penn State's Dept. of Agricultural Sciences. Purchase may be required.

A multi-subject resource providing information on crop and soil management, including information specifically for corn.

An online guidebook published by the University of Illinois Extension. Each chapter provides guidance on different aspects of crop cultivation.