Agronomy - Study Mode

[#861] Recommended Alley width in Alley cropping at least,
Correct Answer

(C) 3 meter

Explanation

Solution: Alley cropping is a specific practice in which trees or shrubs and crops are grown in alternate rows. And these trees are commonly pruned to limit the shading of the agricultural crop. And one more thing that needs to be supervised is the width of the alley, it should be at least 3 meter. Alley cropping helps in restoring soil fertility by nutrient cycling and erosion control.

[#862] Which nutrient mimics nitrogen deficiency
Correct Answer

(C) Molybdenum

Explanation

Solution: The deficiency of molybdenum mimics nitrogen deficiency as in the absence of sufficient molybdenum the plants accumulate nitrate in their leaves, but cannot use it to make proteins for normal growth. The plant becomes stunted and the leaves show symptoms of nitrogen deficiency and appear to be pale green or yellowish green in colour.

[#863] In arid and semi-arid regions of India the effective rainfall is assumed as
Correct Answer

(B) 70%

Explanation

Solution: Arid and Semi-arid regions are characterized by mean annual precipitation between 200 and 700 mm. Effective rainfall is equal to the difference between total rainfall and actual evapotranspiration. And effective rainfall for arid and semi-arid regions of India is assumed to be 70%.

[#864] The Photoperiodic behaviour of Maize
Correct Answer

(B) Quantitative Short Day plant

Explanation

Solution: Maize is a crop of tropical origin and adapted to short day lengths, therefore the photoperiodic behavior of maize is Quantitative short day plant. Maize show sensitivity to the photoperiod on a high scale due to high expression of cicardian rhythm responding genes improperly early in the light.

[#865] Rice grown in Indonesia belongs to
Correct Answer

(D) Oryza sativa javanica

Explanation

Solution: Javanica variety of rice is mostly grown in Indonesia. These are with broad, stiff, light green leaves. It is low-tillering and has a tall plant stature. Rice cultivation in Indonesia is well suited because of its warm climate, high amounts of rainfall and low labour costs.