Most crop plants suffer a decline in growth when exposed to saline conditions although cotton is classified as a salt-tolerant crop. Although there has been extensive study of the effect of salinity on cotton at germination and during seedling growth there is less information on the effects of salt on the overall growth of the cotton plant. The effect of salinity on yield has been considered but there is limited information on the effect on fibre quality. Several cultivars are being studied to examine the effects of different salts on various stages of development of the cotton plant.