SOIL AND PLANT ANALYSIS (1+1)

FAQ's

1. Indicate two important field conditions of poor aeration.
Answer: a. High moisture content, b. Slow exchange of gases between soil and atmosphere.

2. Name the two important processes of gaseous exchange between the soil and the atmosphere.
Answer: A. Maas flow b. Diffusion

3. Give the equation to dtermine ODR of a soil.
Answer: ODR = Mi/ nFA
Where M is molecular wt of O2
N is the number of electrons involved in reduction of one molecule of O2
F is Faraday constant
i is current in amperes
A is exposed surface (m2) of electrode

4. Insufficient aeration leads to development of _____________ of gram and _____________ of citrus.
Answer:
Wilt of gram
Dieback of citrus

5. What is meant by ODR?
Answer: ODR (oxygen diffusion rate) is the rate at which O2 in soil air is replenished.