ABSTRACT

The density of baled cotton as well as the storage climate and permeability of the protective covering on the bale all influence the rate of moisture gain and loss as well as the bale thickness. Eight bales of cotton were packaged at universal density and stored without bagging at ambient conditions for 81 days (Phase I). The bale thickness was measured periodically and the bale weights were measured before and after the storage period. The same eight bales were randomly placed in four different types of bagging and stored at 26.7° C (80° F) and 80% relative humidity (RH) for 100 days (Phase II). The bagging included two types of experimental bagging and two types of standard bagging. The experimental bagging was less permeable than the standard bagging. Then, the same bales were stored for 305 days at 21.1° C (70° F) and 50% RH (Phase III). For Phases II and III, the bales were weighed and their thickness measured about twice weekly. The bales gained moisture for Phases I and II but lost moisture (weight) for Phase III. Bale thickness increased initially after storage as climatic conditions fluctuated during Phase I. During Phase II at 80% RH, the bale thickness increased. However, during Phase III at 50% RH, the thickness decreased. The experimental bagging restricted the change in weight gain and loss more than did the standard bagging.