Cotton Varieties Planted in the World

摘要

There are very few regions or states in the world where only one variety is allowed or recommended for cultivation by all farmers. Growers always demand more varieties, and in many countries of the world, the varieties legally approved and allowed forcultivation make up a long list. It is highly unlikely that all varieties will have the same agronomic features and requirements, and these differences can have an impact on fiber quality. It is not possible to keep production segregated by variety, certainly not under small-scale production systems where each farmer cultivates one hectare of cotton or less. Mixing lint from many varieties definitely increases variability and lowers the uniformity ratio of the fiber. And yet, many varieties are recommended for commercial cultivation within a given region or area.