Nitrogen 6-24-16 We are often finishing up nitrogen right before the 4th of July although this year, it is more like mid-June based on crop development. In our region, we have two philosophies of applying the top-dress nitrogen on cotton. One system focuses on keeping it simple and just applying around 30 pounds or so at planting and the rest when the cotton is 4 to 6 weeks old. This method works well often, but many have noticed on lighter soils we benefit from a split applied approach which focuses on getting an early shot soon after emergence and delaying the final application closer to bloom on more developed cotton. At this point, we are about 2 weeks away from blooming on the earliest planted cotton so all of the nitrogen needs to be going on pretty quickly on this small percentage. However, we are 3 to 4 weeks away from bloom on cotton planted during the second half of May so we have some options and time on this later cotton. One obvious question is material selection as well sense we have a significant cost savings using liquid materials. Liquid 24S is a good choice except when dribbling on light soils in the middles. Cotton roots don’t grow as wide on light soil compared to a better grade of land and have a hard time picking up a dribbled stream 18” away. The knifing rigs overcome this issue, as well as broadcasting at least part of the nitrogen as ammonium sulfate either as a split early, or as a blend with urea, or as a total package. If you are using 30%, be sure you have gotten a good 15 to 25 pounds of sulfur out earlier.
DISCLAIMER: The data contained herein is for informational, conversational, and philosophical thinking and is for general purposes only. Ideas expressed apply to the Upper Southeast growing region. Although the information was obtained from various sources, which we believe to be reliable, we do not in any way guarantee its accuracy or completeness. Comments are influenced by past experiences, personal bias and hypothetical speculation by the writer and are not always accurate predictors of future events. Specific references to Agricultural Products and Rates are used for examples and do not reflect specific endorsement or recommendations for use. Always read and follow all label directions and precautions for use. We disclaim any responsibility for any errors or omissions contained herein. FULL DISCLOSURE: There is no compensation received by Johnny to promote any product referenced with in this blog. Johnny is a paid employee of Commonwealth Gin