Feb. 23, 2017 | 1 p.m. CST
Sulfur (S) is known to be key to crop growth and high yields, yet S deficiency has become a fertility issue worldwide due to a decrease in S depositions from cleaner, less polluted air and an increase in crop removal. Continuous use of high-analysis nitrogen/phosphorus (NP) fertilizers lacking in S can further exacerbate the problem.
Several granular NP fertilizers that contain micronized elemental sulfur (ES) with/without ammonium sulfate (AS) are being marketed to farmers. It is claimed that ES oxidation during the growing season provides the available S that crops need during the late vegetative period within the season of application.
In this webinar, Dr. Chien will examine the merits of these claims via a review of available data, showing how ES oxidation of granular bentonite (ES ± AS) and NP (ES ± AS) fertilizers, in most cases, confer little or limited benefit in providing season-long available S within the year of application. A more effective way to meet late-season S needs of modern corn hybrids and soybean varieties will be discussed.
Dr. S. H. (Norman) Chien
Former Principal Scientist – Soil Chemistry, IFDC
Custom Content Editor
Meister Media Worldwide
** CCA Board-Approved for 1 CEU
in Nutrient Management **
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