Generally, a nutrient deficiency occurs as a result of low soil nutrient levels. However, prevailing environmental conditions, soil properties, and growth conditions may restrict nutrient uptake and induce deficiencies in crops even if soil nutrient levels are deemed sufficient for optimum yield. For example, low or high soil pH, soil compaction, and excessively wet or dry soil may prevent nutrient uptake. A handy diagnostic tool to identify nutrient deficiency in crops is via visual symptoms. In some instances, this tool may not provide a definite diagnosis of the nutrient status of the plant. Keep in mind that there are other conditions that are cable of inducing symptoms that closely resemble those of nutrient deficiencies. Visual symptoms should be corroborated with tissue and/or soil testing. Adequate knowledge of visual symptoms and tissue testing may help guide corrective actions in-season or preventive action in the following season to avoid yield loss.
Adverse conditions experienced during or after cotton planting can negatively impact cotton seedlings and result in seedling death. If severe, stresses can reduce stands to unprofitable yield potentials. Unfortunately, cool nights, excessive rainfall and marginal seed quality from some seed lots have increased reports of failed stands. Determining whether to accept or replant a marginal stand of cotton is a particularly challenging decision since many factors must be considered. The purpose of this post is to highlight a few factors to consider while making the replant decision.