Set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The capability of nitrogen use efficiency can be increased in crop production by

a) Using the slow release of nitrogen fertilizer

b) Use of split application

c) Use of nitrogen inhibitors

d) All of the above

Question : 2

Azolla is

a) Aquatic bacteria

b) Aquatic Fern

c) Aquatic algae

d) None of the above

Question : 3

Blue-green algae are chiefly used as biofertilizer in the crop of

a) Paddy

b) Wheat

c) Gram

d) Mustard

Question : 4

Which bacteria is responsible for nitrogen fixation in soyabean?

a) Rhizobium fajioleai

b) Rhizobium leguminosarum

c) Rhizobium japonicum

d) Rhizobium traitolai

Question : 5

Which one of the following is not correctly matched? Nitrogen fixing Crop agent

a) Azotobacter - Wheat

b) Blue-green algae - Paddy

c) Rhizobium - Pea Leguminisarum

d) Azolla – Maize

Question : 6

2, 4-D is

a) A fungicide

b) An insecticide

c) An explosive

d) A herbicide