Sulfur in a Fertilizer Program for Corn
- George W. Rehm and
- John G. Clapp
The importance of sulfur in a fertilizer program for corn (Zea mays L.) has been the focus of diverse research projects conducted over several years at various locations. The requirement for this essential nutrient is not universal. Therefore, it would be desirable to have a useful and practical analytical procedure to predict the requirements. Analysis of either soil for sulfate-sulfur or plants for total sulfur concentration has not proven to be satisfactory in predicting the need for fertilizer sulfur. That challenge remains. Broadcast application of 28 kg sulfur ha−1 or use of 13.5 kg sulfur ha−1 in a band near the seed at planting has proven to be satisfactory in most production situations. Fertilizers containing sulfate-sulfur or thiosulfate are preferable. Measurements to define the effect of fertilizer sulfur on the quality of corn grown for forage have been inconsistent. Additional research on this topic is certainly justified. Because of (i) use of higher-analysis fertilizers, (ii) rapid adoption of conservation tillage, and (iii) reduced deposition of sulfate (SO4) from atmospheric sources, a renewed evaluation of sulfur in fertilizer programs is justified.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 5585 Guilford Road, Madison, WI 53711-5801, USA. Sulfur: A Missing Link between Soils, Crops, and Nutrition. Agronomy Monograph 50.