Agronomy - Study Mode
[#126] The aim of topping and desuckering in tobacco is
Correct Answer
(B) Divert the energy and nutrients to leaves
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 stop plants to produce seeds and divert the energy and nutrients from seeds to leaves. Topping is done in the tobacco plant to improve its physical appearance, quality, and quantity of tobacco yield.
[#127] Dapog seedlings are ready to transplant at
Correct Answer
(A) 6 - 8 day
Explanation
Solution: Dapog is a rice cultivation method that involves growing seeds in a nursery. It was first used in the Philippines. In this, seeds are germinated and grown without soil. The seedlings are thus raised and can be rolled like a carpet with roots facing outside and carried to the field for transplantation. The seedlings are ready to transplant within 6 - 8 days.
[#128] The intensity of following one year crop rotation 'maize-potato-onion' is
Correct Answer
(D) 300%
Explanation
Solution: The rotation intensity of any cropping pattern means a growing combination of crops that matches climatic conditions, water availability, and nutrient storage of soil in that particular field. This is calculated by counting the number of crops grown in a rotation and is multiplied by 100 and then divided by the duration of the rotation. Therefore here the intensity is 300%.
[#129] Mechanical analysis of soil makes use of
Correct Answer
(B) Stoke's law
Explanation
Solution: Mechanical analysis is the determination of the size range of particles present in the soil and it is expressed as a percentage of the total dry weight. And its analysis is based on Stroke's law, which states that the terminal velocity of settling of spherical particles in suspension varies with the square of the diameter of the sphere, the density and viscosity of the field and the density of the sphere (soil particles are considered as spheres).
[#130] Lucerne (Medicago sativa) is a native of
Correct Answer
(A) Persia
Explanation
Solution: Lucerne, also known as Alfalfa, whose scientific name is Medicago sativa, is a perennial flowering plant in the legume family. It is native to Persia but is now grown worldwide as an important forage crop. It is used for grazing, hay and silage, as well as green manure and cover crops.