Explanation
Most desert soils are called Aridisols (dry soil). These are porous sandy soils with low nitrogenous matter and humus.
Over irrigation is main cause of land degradation in Punjab due to waterlogging leading to increase in salinity and alkalinity in the soil. Punjab, Haryana, Uttar Pradesh are the states facing issue of land degradation.
It sounds incredible but it’s true that the world’s wettest town - Cherrapunji - is now suffering from a shortage of drinking water. The problem is that Cherrapunji lies atop a high limestone plateau. Rain falling on the town drains away immediately. Very little rain collection takes place, because the locals don’t like the taste of water running off rusty tin roofs. With a growth in the town population, water has to be carried up from the plains during the drier winter months.
Water is naturally present, as we know, whether in the form of glaciers or sea and underground water. The most effective use of water by harnessing its energy is to generate hydropower. Water is considered sustainable as well as providing the least solid waste during energy production compared to other resources that are used to generate energy and electricity.
The correct answer is A .
Strip cropping is a method or farming in which more than one variety of crops are grown in different strips.
One of the important crop that is usually grown along with other crops is gram. This is because it has good soil holding capacity and prevents soil erosion.
Soil Erosion is the action of exogenous processes that strip soil and rock from one location on the crust of the Earth and then transport it to another location where it is deposited (such as water flow or wind).
The correct answer is D .
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