Plant Nutrition and Soil Fertility Past Papers

[OBJECTIVE]

Subject: Plant Nutrition and Soil Fertility

Time Allowed: 15 Min

Total Marks: 10

NOTE: ATTEMPT THIS PAPER ON THIS QUESTION SHEET ONLY. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.

Part-I Encircle the correct option, each question carries equal marks. (10)

1. Nitrogen fixation by micro-organisms is called
(a) Industrial Nitrogen Fixation
(b) Biological Nitrogen Fixation
(c) Atmospheric Nitrogen Fixation
(d) Both b and c
2. Water is a medium and matrix of living things because of its
(a) Great Heat Capacity
(b) High Surface Tension
(c) Best Solvent
(d) All a, b and c
3. Proportion of Nitrogen in plant protein is approximately
(a) 18%
(b) 15%
(c) 20%
(d) 25%
4. Bacteria involved in symbiotic nitrogen fixation in root nodules of legumes is
(a) Rhizobium
(b) Clostridium
(c) Azobacter
(d) Actinomycetes
5. General chlorosis and etiolated habit are characteristic deficiency symptoms of
(a) Nitrogen
(b) Sulpher
(c) Iron
(d) all a, b and c
6. Nitrogen fixation in the nitrogen cycle is brought about by
(a) Lightening
(b) Symbiosis
(c) Free Fixing organism
(d) All a, b and c
7. Which of the following is a micronutrient?
(a) Co
(b) Cd
(c) P
(d) Zn
8. Gravel has particle size
(a) 0.2 mm – 2 mm
(b) 0.02 mm – 0.2 mm
(c) > 2 mm
(d) 0.002 mm – 0.02 mm
9. What is percentage proportion of Nitrogen fixed by Microorganisms?
(a) 50%
(b) 20%
(c) 40%
(d) 90%
10. Which nutrient is considered as constituent of Nucleic Acid, Nucleotides and Co-enzymes?
(a) P
(b) Si
(c) N
(d) S