M.sc (ag) postgraduate entrance test (PET) question papers

1. The active factor of soil formation is :
(I) Parent material
(3) Relief
(2) Climate
(4) Time

2. Black soils (Vertisols) are formed mainly from the weathering of:

(I) Feldspars (2) Amphiboles (3) Granite (4) Basalts

3. Which soils have the highest cation exchange capacity ?

(I) Alluvial soils (2) Red soils
(3) Black soils (4) Laterite soils
4. Plants wilt when soil water content goes below:

(I) 0.1 bar (2) 1/3 bar (3) 5 bar (4) IS bar

5. Available phosphorus in fertilizer is the fraction:
(1) Water soluble P (2) Water soluble + Citrate soluble P
(3) Na HCO, extractable P (4) NH,F extractable P

6. The main reservoir of available Sulphur in soil is :
(1) Organic sulphur
(3) Sulphite S
(2) Sulphate S
(4) Sulphide S

7. The element that gets depleted progressively in the plough layer 01 submerged
rice soil is :
(1) Oxygen (2) Hydrogen (3) Carbon (4) Iron

8. The average nitrogen content of vermi-compost is of the order:
(1) 0.2 - 0.6% (2) 0.6 - 1.2%
(3) 1.2 -1.8% (4) 1.8 - 2.4%

9. Which one is a microorganism in a soil ?
(1) Protozoa (2) Termites (3) Fungi (4) Nematodes

10. The major component of biogas generated from cow-dung is :
(1) H, (2) CO, (3) N, (4) CH,

11. Soil enzyme that has been widely used as a measure of soil quality is :
(1) Deaminases (2) Dehydrogenases
(3) Proteases (4) Amylase

12. Which one is a herbicide?
(1) Simazine (2) Parathion (3) Phorate (4) Malathion

13. In a cell, sites of protein synthesis are:
(1) Chioroplast (2) Ribosomes (3) Plastids (4) Leucoplast

14. Brassica triangle for the development of tetraploid species of mustard was
proposed by :
(1) Kihara (2) Sears (3) Nagaharu U (4) Blakeslee
15. Due to apomictic nature of crop Mendel could not prove his findings on :
(1) Plum (2) Peach (3) Garden Pea (4) Hawk-weed
16. Who first of all gave the cytological proof of crossing over in Drosophila?
(1) Bateson (2) Bridges (3) Muller (4) Curt Stern
'7. Criss-cross inheritance was first reported by :
(1) Morgan (2) Bridges (3) Muller (4) Wilson
18. The intra-allelic interaction resulted:
(1) Epistasis (2) Dominance
(3) Additive (4) Environmental variance
19. The triplet code for cadons represented as:
(1) (4)' (2) (4)' (3) (4)3 (4) (4)'
20. National Research Centre for groundnut is located at :
(1) Bharatpur (2) Kanpur (3) Junagarh (4) Akola
21. The basic idea of multiple factor hypothesis was originally given by :
(1) Nilsson-Ehle (2) Yule (3) Johanssen (4) Galton
22. Colchicine disturbs:
(1) Formation of spindle fibre (2) DNA replication
(3) Cytokinesis (4) Formation of cell plate