Solution:
According to figure of 2014-15, India ranks first in cotton production. India ranked behind China (6.48 million ton) with a production of 6.51 million ton. Chile ranks first in copper production, China in mica and tea.

Solution:
Gram is a cash crop in India. A cash crop or profit crop is an agricultural crop which is grown to sell for profit.

Solution:
The following that are true with regard to coal in India are Coal is found in sedimentary rocks, The best quality of coal is lignite and The Damodar river valley is popularly known as the 'Ruhr of India'.

Solution:
Mixed farming means growing two crops at the same time. Mixed farming is growing two or more crops simultaneously on the same piece of land. This reduces risk of crop failure and it gives some insurance against failure of one of the crops.

Solution:
Lime can be used to correct acidic soil. It increases the pH of acidic soil (the lower the pH the more acidic the soil); in other words, soil acidity is reduced and alkalinity increased. it provides a source of calcium and magnesium for plants. it permits improved water penetration for acidic soils.

Solution:
Wheat, barley, gram groups of crops is grown in India during the Rabi season.Rabi crops are sown in winter from October to December and harvested in summer from April to June. Some of the important rabi crops are wheat, barley, peas, gram and mustard.

Solution:
The following that are not the characteristics of red soils are they have high water retention capacity and they have high nitrogen content.