1.
The C : N ratio of saw dust is

2.
The nutrient with a key role in biological N-fixation is

3.
Which of the following elements is not major nutrient element?

4.
Which photosynthetic bacteria possess both PS I and PS II?

5.
The most striking symptom of false smut of rice (Claviceps oryzae-sativae) is/are

6.
Margosa is a highly effective product in reducing root-knot population belongs to

7.
Richest source of nitrogen is

8.
A photosynthetic organism which does not release oxygen is

9.
Match the following columns:
Column I (Rhizobium sp.) Column II (Crops)
a. R. lupini 1. Lupine group
b. R. trifoli 2. Clover group
c. R. japonicum 3. Soybean
d. R. mcliloti 4. Alfa-alfa

10.
Interveinal chlorosis occurs due to deficiency of