Increasing Weight per Boll

The cotton fibers elongate for the first three weeks after anthesis, in what is called The Boll Enlargement Phase.

The fibers are single celled, and elongate thousand fold in length in this phase. Good supplies of water and potassium are required.

The fibers are single celled, and elongate thousand fold in length in this phase. Good supplies of water and potassium are required.Potassium plays an important role in fiber growth and deficiency can have an adversely effect on the weight of the boll due to bad development of fiber. Insufficient supply of potassium will result in low quality fiber, knotty bolls and poor yield.

Water is also essential in the boll enlargement phase. Extremes in temperature in this period will have a negative effect on boll weight.