Practice MCQs Questions on Management of Problematic Soils and Water for Agronomy NET+ARS(P)+STO Exam

Practice MCQs Questions on Management of Problematic Soils and Water for Agronomy NET+ARS(P)+STO Exam 2021-22

MCQ 1.

Sodium adsorption ratio (SAR) can be calculated by using of formula

1. SAR = Na⁺ / ⇃Ca²⁺  + Mg ²⁺
2. SAR = Na⁺ / ⇃(Ca²⁺  + Mg²⁺ )/2
3. SAR = Ca²⁺ + Mg²⁺ /  ⇃Na⁺
4. SAR = Na⁺ /  ⇃Ca²⁺ + K/2

MCQ 2.

The exchangeable sodium ratio (ESR) can be calculated as

1. ESR = Exchangeable (Ca²⁺  + Mg²⁺)/Exchangeable Na⁺
2. ESR = Exchangeable Na⁺ / ⇃Exchangeable (Ca²⁺  + Mg²⁺)
3. ESR = Exchangeable Na ⁺ / Exchangeable (Ca²⁺  + K⁺ )
4. ESR = Exchangeable Na ⁺ / Exchangeable (Ca²⁺  + Mg²⁺)

MCQ 3.

Leaching requirement can be estimated by formula

1. LR = EC_iw/EC_dw
2. LR = EC_dw / EC_iw x 100
3. LR = D_iw/D_dw
4. None of the above

MCQ 4.

_________is the ratio of the increase in osmotic pressure produced by the fertilizer to that produced by the same weight of sodium nitrate (NaNO3).

1. Osmotic pressure
2. Nutrient index
3. Sodium index
4. Salt index

MCQ 5.

The liming of acid soils will usually increase the availability of :

1. Fe
2. Zn
3. Cu 
4. Mo

Answer Key is

Practice Compete Test Series (1200+MCQs) in AgriCoachingOnline App.

Answer Keys:  

ANS.: 1. b. SAR = Na+ / ⇃(Ca2+  + Mg2+ )/2

ANS.: 2. d. ESR = Exchangeable Na + / Exchangeable (Ca2+  + Mg2+)

ANS.: 3. a. LR = ECiw/ECdw

ANS.: 4. d. Salt index

ANS.: 5. d. Mo