Agronomy - Study Mode

[#236] The downward movement of surface soil water is known as
Correct Answer

(B) Percolation

Explanation

Solution: Percolation is the movement of water in a downward direction within the soil. It is also termed permeability or hydraulic conductivity. It is the slow process of the movement of water through pores or free spaces in the soil. The water flows to recharge the groundwater in the water table and aquifers.

[#237] The main objective of growing a catch crop is to
Correct Answer

(D) Get an additional income without further investment

Explanation

Solution: A catch crop is a fast-growing crop that is grown between successive planting of the main crop. It makes more efficient use of growing space. These catch crops are sown to prevent minerals from being flushed away from the soil and at the same time, it helps to get an additional income without further investment.

[#238] How much nitrogen will be supplied by 500 kg of Ammonium Sulphate?
Correct Answer

(C) 100 kg

Explanation

Solution: Ammonium sulphate is an inorganic salt and is most commonly used as a soil fertilizer. It contains 21% of nitrogen and 24% of sulphate. Hence, 21% of 500 is 105 therefore, approximately 100 kg of nitrogen is supplied by 500 kg of Ammonium sulphate.

[#239] Phalaris minor is mainly associated with
Correct Answer

(A) Dwarf wheat

Explanation

Solution: Phalaris minor is a pernicious weed, which infests several crops during the winter season, particularly the Dwarf wheat in rice - wheat intercropping sequence. It grows as a tufted annual bunchgrass with a spike like a panicle and grows up to 1.8 meters in height. It is used as fodder or forage for livestock and birdseed.

[#240] Chiseling depth is generally referred to
Correct Answer

(D) 50 - 60 cm

Explanation

Solution: A chisel is a tool with a cutting edge blade on its end, for carving or cutting a hard material such as wood, stone or metal by hand or mechanical power. It is a popular farming tool used for deep tillage, to loosen and aerate the soil while leaving crop residue at the surface of the soil. It generally ploughs to the depth of 50 - 60cm.