Agronomy - Study Mode
[#946] Alley cropping' means
Correct Answer
(B) Growing of field crops in between two widely spaced rows of fast growing trees
Explanation
Solution: Alley cropping is a specific technique of growing field crops in between two widely spaced rows or alleys of fast-growing trees. For better yield in this practice, it is required to prune the trees regularly to limit the shading of the agricultural crop. It helps in nutrient cycling and at the same time control, soil erosion as big trees have a good hold on the soil.
[#947] Topping consists in removal of the terminal bud with or without some of the small leaves practiced in
Correct Answer
(D) Tobacco
Explanation
Solution: Topping is one of the practices to remove the terminal bud of the plant with or without the small leaves just before or after the emergence of the flower head to make it bushier. Topping is used to stopping plants to produce seeds. Topping is done in the tobacco plant to improve its physical appearance, quality and quantity of tobacco yield.
[#948] Out of the vegetable oils, highest B.V. is of
Correct Answer
(B) Groundnut
Explanation
Solution: Vegetable oils are used for cooking or as food additives, for medical purposes, for cosmetics, or as fuel. Out of these vegetable oils, groundnut oil has the highest B.V. Due to its high smoke point or boiling point value, peanut oil is the clear oil and it is predominantly used for frying.
[#949] Which of the following strain is used for biological nitrogen fixation in soybean
Correct Answer
(C) Rhizobium japonicum
Explanation
Solution: Soybean is a legume crop, that forms symbiotic association with rhizobium bacteria in the root area to form nodules for fixing atmospheric nitrogen. Soybean is mostly inoculated with Rhizobium japonicum .
[#950] If an acid soil is limed to the pH level it enhances nitrification
Correct Answer
(C) 5.5 - 6.5
Explanation
Solution: If lime is added to acidic soil, it increases soil pH by up to 5.5 - 6.5. It also adds calcium and magnesium and reduces the solubility of aluminum and manganese in the soil. When soil pH reaches its optimum value, its fertility increases. Hence, it has a positive impact on soil fertility and nitrification.