Agronomy - Study Mode
[#411] Last discovered essential nutrient for plant is
Correct Answer
(B) Nickel
Explanation
Solution: As per the Botanists, there is a total of 17 essential nutrients required by the plants for proper growth and development. These are Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Potassium, Sulphur, Calcium, Magnesium, Boron, Chlorine, Copper, Iron, Manganese, Molybdenum, Zinc and the last one is Nickel .
[#412] The crown roots in wheat appear
Correct Answer
(B) Below soil surface but above seed
Explanation
Solution: Crown roots in wheat are those roots that emerge below the soil surface but above the seed that is at nodes above the coleoptile node. Crown roots are the secondary roots, which began with the appearance of tillers.
[#413] In wet bed method of nursery raising of rice, seedling would be ready for transplanting at an age of
Correct Answer
(C) 20 - 25 days
Explanation
Solution: The wet bed nursery is an area for germinating seeds of rice where there is enough water for irrigation. The soil in the field should be thoroughly puddled and leveled with proper drainage canals. Here, seedlings are ready for transplantation at an age of 20 - 25 days.
[#414] Phosphatase enzymes play a major role in . . . . . . . . of organic phosphates.
Correct Answer
(A) Mineralization
Explanation
Solution: Phosphatase enzymes play a major role in the Mineralization of Organic Phosphates. It also removes a phosphate group from a protein. These enzymes are produced by microorganisms in the soil and serve to remove a phosphate group from its substrate and transform the unavailable organic P into assimilable phosphate for the plants.
[#415] Maximum amount of fertilisers is used in
Correct Answer
(A) Potato
Explanation
Solution: Potato needs fertilizers in optimum amounts to increase the tuber size, weight and quality and also to reduce the number of non- marketable tubers. It requires Nitrogen, Phosphorus and Potassium in their external nutrition.