Agricultural Practices and Land Use

This is the correct option. Sustainable agriculture is the adoption of various farming and production management techniques to maximise agricultural yield. Integrated agriculture is a combination of agriculture with other forms of culture such as pisciculture, aquaculture, sericulture etc. Organic farming is the practice of raising crops which have not been polluted with the use of manures, biofertilisers and biopesticides.

This is the correct option as all of the above are the advantages of crop rotation. Several crops may be grown in succession with only one soil preparation. Example, land is ploughed for maize and its stubble is left on the land for wheat.

This is the correct option as none of these statements are false. In mixed cropping, the risk of total crop failure due to uncertain monsoon is reduced. Due to the complementary effect of component crops, the yield of both crops increases and in mixed cropping, the chances of pest infestation are greatly reduced. This is a wrong option as statement 'b' is correct.

This is the correct option, as it is a mechanical method to control weeds. All the lighter and finer operations carried out on the soil, between sowing and harvesting are termed as intercultural operations. This includes weeding, fertiliser application, mulching, etc.

Ploughing is the process, which prepares the soil for the growth of a crop. It helps in loosening the soil, makes it well aerated, brings nutrient rich layer to the top and mixes nutrients evenly. It does not have anything to do with uniform distribution of water. 

Irrigation is done after adding manure and fertilisers, so that along with water, minerals and fertilisers are also absorbed by the soil.

Crop rotation is done to increase the fertility of the soil. 

Ploughing does not reduce the population of pests in the soil. The other statements are correct.

Agricultural practices are the processes adopted in the field such as preparing the soil, adding nutrients for the growth of crops and cutting down the crop i.e. harvesting, whereas selling grains in a market does not involve any field process and is thus not an agricultural practice. 

Slash and burn is a forestry technique, which involves cutting down trees and shrubs, on a large swath of land, allowing them to dry, and then setting a fire. It is a rapid and effective method for clearing a chunk of land, typically with the intention of converting it, for agricultural use. It does not characterize green revolution.

Synthetic fertilizers are chemical which are prepared in factories. They are rich in specific nutrients like nitrogen, potassium and phosphorus. They are not used in organic farming.

 Agricultural practices are practised in a stepwise manner to optimize the growth of crops. First, the soil is prepared by loosening and turning to sow the seeds and then nutrients are added for good growth of seeds. Then appropriate amount of water is supplied by irrigation after which the unwanted plants are removed. This process is known as weeding. 

Farmer prepares the soil by using different implements. Earthworms during their activity in the soil help in loosening and turning the soil to optimize its efficiency and are thus known as farmer's friend.

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This is the correct answer choice as none of the statements given is incorrect.