HORTICULTURE

Detailed explanation-1: -The double cropping of winter wheat and corn in the North China Plain helped make China the world’s leading grain producer. Winter wheat grown there yields close to 4 tons per hectare. Corn averages 5 tons. Together these two crops, grown in rotation, can yield 9 tons of grain per hectare per year.

Detailed explanation-2: -The use of green manure and farmyard manure will increase the growth and production of Rice. Nitrogen increases plant height, panicle number, leaf size, spikelet number, and some filled spikelets, which largely determine the productivity of a Rice plant.

Detailed explanation-3: -This means two crops a year instead of only one, doubling production from the same bit of land. It all begins with rice that ripens early. The new system depends on varieties of rice that ripen early.