Solution:
Wheat and rice in China are cultivated in Lower Yangtse Basin. Paddy rice is the major grain crop in China, grown mainly in the Yangtze River valley and southern China, and on the Yunnan-Guizhou Plateau. The output of wheat accounts for slightly more than one fifth of the total output of grain; it is planted throughout China but mainly on the North China Plain.

Solution:
Petroleum is generally found in folded marine sedimentary rocks. Sedimentary rocks Petroleum may occur in any porous rock, but it is usually found in sedimentary rocks such as sandstone or limestone. Sandstones, because of the inherent porosity between their grains, often become excellent reservoirs for oil or natural gas.

Solution:
Prairies are enormous stretches of flat grassland with moderate temperatures, moderate rainfall, and few trees. When people talk about the prairie, they are usually referring to the golden, wheat-covered land in the middle of North America.

Solution:
It is actually ‘a sea of grasses’. The prairies cover parts of the United States of America and parts of Canada. The Rocky Mountains bound them in the West. The Great Lakes cover them in the east. The tributaries of Mississippi drain the prairies in the USA. On the other hand, the tributaries of the Saskatchewan Rivers drain the prairies of Canada.

Solution:
The most effective farming method for returning minerals to the soil is Crop rotation. Crop rotation can be defined as the practice of growing several dissimilar or different crop types in the same area in sequential seasons. Crop rotation is beneficial both to the environment and to the farmer.

Solution:
The country which leads in the production of rubber is Indonesia. Since the 1980s, the Indonesian rubber industry has been experiencing steady production growth. Indonesia is one of the leading rubber producing country in the world, it is second largest natural rubber exporter after Thailand.

Solution:
Convectional rainfall occurs in the Equatorial region throughout the year.