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During the 1950s and Nineteen Sixties, scientists developed new strains of high-yield wheat and rice. This daring experiment in agriculture has been called the "Green Revolution." Traditionally, farmers have used a selection of methods to protect their crops from pests and ailments. They have put herb-based poisons on crops, handpicked insects off crops, bred strong kinds of crops, and rotated crops to control bugs. Now, nearly all farmers, particularly in developed countries, depend on chemical compounds to manage pests. South American average wheat yields are round 2 t/ha, African underneath 1 t/ha, and Egypt and Arabia as a lot as three.5 to 4 t/ha with irrigation. In distinction, the common wheat yield in international locations similar to France is over 8 t/ha. Variations in yields are due mainly to variation in climate, genetics, and the extent of intensive farming techniques . Following the three-sector theory, the number of folks employed in agriculture and differe