Late season deficiency may be characterized, on plants with a moderate boll load, by foliar symptoms appearing as reddening in the middle of the canopy with few bolls retained at late fruiting sites. Nitrogen deficiency can actually delay flowering by an increase in the time to first bloom and by increasing the time interval between flowering on the same fruiting branch. After nitrogen deficiency symptoms are detected the problem can be addressed by applying additional nitrogen as a soil application or foliar feed. Making mid and late season applications of nitrogen requires a thorough understanding of the cotton crop and the situation at hand. Before an application is made, or a sequence of applications are begun, be sure you have professional advice.
Mistakes dealing with nitrogen can have serious consequences.
Be sure the situation is evaluated properly and the proper course of action taken. A shortage of nitrogen can reduce yields. The best way to manage nitrogen is through a sound soil fertility program. Recommendations on this web site do not endorse any commercial products or trade names.