Agronomy - Study Mode

[#486] Glyphosate inhibits
Correct Answer

(D) EPSPS

Explanation

Solution: Glyphosate is a broad spectrum systemic herbicide and crop desiccant. it is used to kill weeds, especially annual broadleaf weeds and grasses. It is an organophosphorus compound, specifically a phosphonate, which acts by inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthetase (EPSPS) .

[#487] For each unit increase in pH, the concentration of Mn 2- decreases by . . . . . . . . folds.
Correct Answer

(B) 100

Explanation

Solution: Microbial respiration and activity decide the availability of manganese ions in the soil and it is mostly low at neutral to alkaline pH, acidification of the rhizosphere has an important role in mobilizing soil Manganese ions. The pH change in the soil depends on the buffering capacity of soils, bulk soil pH, nitrogen sources and other factors. For each unit increase in pH, the concentration of Mn 2- decreases by 100 folds.

[#488] Sugarcane crop is a
Correct Answer

(A) Short day plant

Explanation

Solution: Sugarcane is a species of tall perennial grasses, with 2 - 6 m tall, stout, jointed and fibrous stalks that are rich in sucrose. It belongs to the family Poaceae and is native to the warm temperate and tropical climates. Sugarcane is a short day plant, it requires a maximum of 8 - 10 hours of daylight for a good yield, which is why it usually blooms in winter when days are shorter.

[#489] Central Plantation Crop Research Institute is located at
Correct Answer

(B) Kasargod

Explanation

Solution: CPCRI is Central Plantation Crops Research Institute was established in 1970 under the Indian Council of Agricultural Research at Kudlu, Kasaragod, Kerela. It serves as a national forum for improving the genetic potential of plantation crops and conducting basic and applied research on various aspects of these crops to produce genetically superior planting materials for coconut, Arecanut, cashew nut and spices.

[#490] Which one of the following can be suitably grown as a mixed crop with wheat?
Correct Answer

(D) Mustard

Explanation

Solution: Mixed cropping is growing two or more crops in the same field at the same time. Mustard a leguminous crop is best to be grown with wheat in the same field. This mixture consists of broadcasting mustard seed after sowing of wheat in the field, followed by planting.