Cotton is one of the most important fibers and cash crops. It is playing a dominant role in the industrial and agricultural economy of the country. Cotton is growing chiefly for its fiber which is used in the manufacture of cloth for mankind. It is also used for several other purposes such as making threads for mixing with other fibers and for extraction of oil from cottonseed. All these uses give a high industrial value to this crop, and as such a handsome remuneration to the growers. Cotton is a soft, staple fiber that grows in a farm known as a boll around the seeds of the cotton plant (Gossypium sp.), a shrub native to tropical and subtropical regions around the world. Successful cultivation of cotton requires a long frost-free period, plenty of sunshine.
Cotton crop is one of the most important field crops .It is an important export manufacturing crops and cotton crop was affected by potassium deficiency and the most important roles of potassium on cotton crop: -
One of the most important functions of phosphorus on cotton crop as following:
The role of calcium in cotton crop:
Initial symptoms of potassium deficiency appear in the form of yellowish white spots between the veins on the lower leaves and the affected tissues die at the centers of the spots. At the same time burns appear at the tops of the leaves and around the edges between the veins and breaks the peaks and edges also show symptoms of shortages also in:-
Phosphorus deficiency Symptoms on cotton crop shows on old leaves in the form of scarlet or purple- color: