Respuesta de la yuca a la aplicacion de fosforo

Cassava is among the food crops that tolerate soil acidity well; therefore, it is often planted on highly acid, unfertile soils without fertilization or liming. Nevertheless, cassava needs large quantities of P for maximum productivity. In fertilization trials at Carimagua (Llanos Orientales, Colombia), cassava responded positively to P2O5 applications (400 kg/ha). Rock phosphates are a good P source for cassava. The best time to apply P was at planting. Maximum yield and highest net income were obtained with 140 kg P2O5/ha and 180 kg K2O. At 2 sites in the state of Valle del Cauca, there was no response to P except when combined with a large amount of K. A highly promising alternative to the application of high quantities of P is the identification of cassava varieties tolerant to low P levels. CIAT germplasm material is now being evaluated for tolerance to P deficiency and Al toxicity. (AS-CIAT

An account of food and drink in Tasmania, 1800-1900

The consumption of food in Tasmania is traced from historical accounts between 1800 and 1900. The consumption patterns were apparently greatly influenced by the historical and economic development of the Colony. The differences between the diet of the free settlers and the captive part of the population are described