Potassium (K) is an essential nutrient for normal plant growth and development, which plays a particularly important role in fiber development. Potassium defi¬ciency results in decreased fiber quality and lowered yields. If K is limited during active fiber growth, there is a reduction in the turgor pressure of the fiber result¬ing in less cell elongation and shorter fibers at maturity.
Knowledge of potassium (K) requirements for cotton growth and development is needed for efficient production. Fertilization of cotton with K is a complex issue, because soils vary widely in terms of K-supplying capacity and K fertilizer adsorption.