Pineapple Experiment in Zanzibar

Abstract

Manurial and spacing experiments with pineapples, which have been carried out for four years, indicate that, under Zanzibar conditions, dressings of sulphate of ammonia cause increases in the number and size of fruits produced. The effect of sulphate of ammonia on the number of fruits produced became negative for the second ratoon crop, but positive again· after partial re-planting. Dressings of sulphate of potash which caused decreases in yield in the first year became of positive value and caused yield increases by the fourth year. These are greatest when nitrogen is also present.