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All three crops of India mentioned in the question, namely cowpea, green gram, and pigeon pea, can be used as pulse, fodder, and green manure.
Pulse refers to the edible seeds of leguminous plants that are rich in protein and provide essential nutrients to the human diet. Cowpea, green gram, and pigeon pea are all pulses that are commonly consumed in India and are used in various traditional dishes.
Fodder refers to food that is given to domesticated animals, especially livestock, to provide them with essential nutrients. All three crops are used as fodder, as they are rich in protein and provide good nutrition to the animals.
Green manure refers to the practice of using plants to improve the fertility of the soil. The plants are grown and then plowed back into the soil to add organic matter and nutrients. All three crops can be used as green manure as they are leguminous and fix nitrogen in the soil.
Therefore, all three crops - cowpea, green gram, and pigeon pea - can be used as pulse, fodder, and green manure in India.