a. What kind of areas are ideal for shifting cultivation?
b. What are the requirements of extensive cultivation?
c. Who was Dr. Norman Borlaug? How did he help to improve agriculo
Answers
Answer:
a. Shifting cultivation is a mode of farming long followed in the humid tropics of Sub-Saharan Africa, Southeast Asia, and South America. In the practice of “slash and burn”, farmers would cut the native vegetation and burn it, then plant crops in the exposed, ash-fertilized soil for two or three seasons in succession.
b. Extensive agriculture, in agricultural economics, system of crop cultivation using small amounts of labour and capital in relation to area of land being farmed. The crop yield in extensive agriculture depends primarily on the natural fertility of the soil, the terrain, the climate, and the availability of water.
c. He obtained a PhD in plant protection at the age of 27, and worked in Mexico in the 1940s and 1950s to make the country self-sufficient in grain. Borlaug recommended improved methods of cultivation, and developed a robust strain of wheat - dwarf wheat - that was adapted to Mexican conditions.
Answer:
a.In shifting agriculture, after two or three years of producing vegetable and grain crops on cleared land, the migrants abandon it for another plot. Land is often cleared by slash-and-burn methods—trees, bushes and forests are cleared by slashing, and the remaining vegetation is burnt. The ashes add potash to the soil.
b.Extensive agriculture, in agricultural economics, system of crop cultivation using small amounts of labour and capital in relation to area of land being farmed. The crop yield in extensive agriculture depends primarily on the natural fertility of the soil, the terrain, the climate, and the availability of water.