Soil Science MCQ – 33

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Q.1: Enzyme responsible for breaking down of the N ≡ N?

1. Nitrogenase
2. Nitrate reductase
3. Nitrite reductase
4. None of the above

Q.2: In DTA (Differential Thermal Analysis), which are used as inert material?

1. Al2 O3
2. Silica
3. Charcoal
4. All of the above

Q.3: What is the connotation of ‘Fol’ formative?

1. Flood plain
2. Mass of leaves
3. Mixed horizon
4. Excess wetness

Q.4: Rhizobia is what type of organism?

1. Autotrophic
2. Heterotrophic
3. Both A and B
4. None of the above

Q.5: Earth worm excreta generally having _% Ca?

1. 10%
2. 25%
3. 15%
4. 20%

Q.6: Endopedon having high bulk density is?

1. Fragipan
2. duripan
3. sombric
4. petrocalcic

Q.7: Plasticity Index is given by?

1. Birmingham
2. Yoder
3. Russel
4. Atterburg

Q.8: Principle factors governing K fixation in clay lattice are?

1. Ionic radii
2. Hydration energy
3. both A and B
4. Lattice morphology

Q.9: Which type of fertilization enhances manuring properties of Green Manures?

1. Nitrogenous
2. Phosphatic
3. potassic
4. FYM

Q.10: Relative purity or strength of the spectral color of soil is?

1. Hue
2. Value
3. Chroma
4. None of the above

Soil Science MCQ – 33

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