DENDROLOGY

Detailed explanation-1: -Rice crop needs a hot and humid climate. It is best suited to regions which have high humidity, prolonged sunshine and an assured supply of water. The average temperature required throughout the life period of the crop ranges from 21 to 37º C. Maximum temp which the crop can tolerate 400C to 42 0C.

Detailed explanation-2: -In the temperature range of 22–31 °C, the growth rate increases linearly. But, higher temperature adversely affects growth and productivity (Yoshida, 1981). Typically, a rice crop requires about 2000–4000 degree days, which corresponds to 80–160 days, depending on the cultivar and location.

Detailed explanation-3: -Rice planting happens in the spring, cultivation in the summer, and harvest in the fall. The Japanese style of rice-growing adjusts its repertoire of operations according to the flux of the seasons. Because Japan has an abundant amount of rain, most rice is grown through the process of wet cultivation.