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

"Corn Growth and Development is an updated and expanded publication and includes whole plant photography, detailed descriptions of vegetative and reproductive development, and dry matter and nutrient accumulation figures."

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

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