Agronomy - Study Mode

[#211] The scientific study of relationship between soil and living things are termed as
Correct Answer

(A) Edhaphology

Explanation

Solution: Edaphology is the science or study of soil, especially concerning plant growth. It deals with the relationship between soil and living things. Pedology is a disciple within soil science which focuses on understanding and characterizing soil formation, evolution, and the theoretical frameworks for modeling soil bodies. Mineralogy is concerned with all aspects of minerals, including their physical properties and chemical composition.

[#212] Hydraulic conductivity of soils varies directly with
Correct Answer

(C) Total porosity

Explanation

Solution: Hydraulic conductivity defines the proportional relationship between flux and hydraulic gradient, or in this case, of unidirectional flow of water in saturated soil. Saturated hydraulic conductivity is a quantitative expression of the soil’s ability to transmit water under a given hydraulic gradient. Hydraulic conductivity of soils varies directly with the total porosity of the soil.

[#213] For ecological balance, the area under forests in India should be about
Correct Answer

(D) 33%

Explanation

Solution: As per The National Forest Policy, it has been proposed that the area under forests in India should be about 33% for ecological balance. At present, the total forest and tree cover of the country is 80.9 million hectares which are 24.62% of the geographical area of the country.

[#214] Match column I (instruments) with column II (uses) and select correct answer: Column I Column II a. Leaf area meter 1. Soil moisture b. Psychometer 2. Crop canopy c. Pressure plate 3. Atmospheric tension d. Irrometer 4. Relative humidity
Correct Answer

(A) a-2, b-4, c-1, d-3

Explanation

Solution: A leaf area meter is a lightweight instrument to get leaf area measurements. It is widely used to measure crop canopy. A psychrometer is an instrument that measures relative humidity in the atmosphere by taking two thermometers i.e. both a wet bulb and a dry bulb to take a temperature reading. The pressure plate is the device that is used to determine soil moisture, water retention and suctions greater than 0.4 bar. Irrometer is the instrument use to measure Atmospheric tension. An Irrometer will measure the actual soil water tension, true measurement of soil water potential also.

[#215] Which of the following does not belong to family-Gramineae?
Correct Answer

(C) Okra

Explanation

Solution: Gramineae or Poaceae is a large family of grasses, it includes cereal grasses like oats, Barley, Maize, etc. Whereas Okra is a flowering plant known for its edible seed pods. It is cultivated in warm and tropical climates. Raw okra is 90% water, 2% protein, 7% carbohydrates and contains negligible fats.