Abstract
Field research in 2003 and 2004 evaluated soybean injury, weed control, yield response, and cost-effectiveness of foliar-applied, commercially-available K fertilizers with glyphosate. Fertilizer sources were applied at the highest soluble rate for dry formulations or were used as the carrier with glyphosate. All K-fertilizer sources had less than 10% injury 7 and 14 days after treatment (DAT) except 0-0-30-0 (%N-%P2O5-%K2O-%S). Tank mixtures of 0-0-62-0, 14-0-46-0, 0-0-50-17, and 3-18-18-0 with glyphosate controlled common ragweed, common lambsquarters, common waterhemp, and giant foxtail greater than 85% and had grain yields similar to glyphosate plus diammonium sulfate (DAS). Gross margins when glyphosate was tank-mixed with 0-0-62-0, 14-0-46-0, and 0-0-50-17 ranged from $290 to 300/acrewhich were similar to glyphosate plus DAS. This research demonstrated that several K fertilizer sources may be combined with glyphosate for cost-effective foliar fertilizer applications while minimizing crop injury and maintaining weed control.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.