Agronomy - Study Mode
[#551] Mat type nursery is related to
Correct Answer
(B) Paddy crop
Explanation
Solution: The mat type nursery is related to paddy cultivation, in this type seedlings are established in a layer of soil mix, arranged on a firm surface. From this nursery, the seedlings are ready for planting in fields within 14 - 20 days after seeding.
[#552] Deep ploughing of soil in groundnut is avoided as it
Correct Answer
(A) Makes harvesting difficult
Explanation
Solution: Deep ploughing of soil in groundnut is avoided as it makes harvesting difficult. Timely field preparation facilitates timely sowing which ensures higher yield. Initial ploughing should be carried out at optimum moisture range to get better tilth. After an initial ploughing wait for 4 - 5 days to reduce the moisture content of the cold and subsequent ploughing and harrowing better physical condition of soil could be obtained with fewer operations.
[#553] Which form of nitrogen is available in urea
Correct Answer
(B) Amide
Explanation
Solution: Urea is the chemical fertilizer used in plants as a source of nitrogen in the form of amide, which is an essential nutrient crucial for plants' growth and development. Urea is the most used and important nitrogenous fertilizer in the country because of its high nitrogen content (46%). The amide form of nitrogen is converted into ammonical form and then to nitrates in the presence of soil microorganisms.
[#554] Crop rotation is defined as a
Correct Answer
(B) System of growing different crops in succession on the same land
Explanation
Solution: Crop rotation or intercropping is defined as a system of growing different crops in succession on the same land. It maintains the fertility of the soil with the rotation of absorption of a set of nutrients. It also reduces reliance on one set of nutrients, pest and weed pressure and the probability of developing resistant pests and weeds.
[#555] Canola has Erucic Acid in the tune of
Correct Answer
(B) < 2%
Explanation
Solution: Canola has Erucic Acid in the tune of less than 2%. Erucic acid is a monosaturated omega-y fatty acid present in oil-rich seeds of the Brassicaceae family of plants. Erucic acid is not harmful to use in small doses, but at higher levels may be a risk to the human body.