.15
.16
.17
.18
.19
.20
.21
وو

23.
24.
25.
26.
27.
28.
29.
30.

31.
32.

33.

2 C 80922-B

What is the aim of soil fertility test ?
Describe endoparasites with an example.
What is the use of Bordaux mixture ?
Write on Nod factors.
What are endophytes ?
What is protoco-operation ?
Write on red rot of sugarcane.
Differentiate clay and sandy soil.

(10 x 2 = 20 marks)

Section C
Write short notes on any six questions.
1 Each question carries 5 marks.
Soil microflora.
Carbon cycle.
Microbial interactions between populations.
Ruminant microflora in animals and its significance.
Papaya ring rot disease.
Azolla-Anabaena interaction.
Effect of pesticides on soil microflora.
Role of micro-organisms in biogeochemical cycles.
(6 x 5 = 30 marks)
Section D
Write essay on any two questions.
Each question carries 12 marks.

Write a note on rhizosphere effect.

Write a note on biopesticides. Discuss the advantages and disadvantages of biopesticides over
chemical pesticides.

Write a etiology, symptoms and management of early blight of potato and bacterial blight of rice.
(2 x 12 = 24 marks)