Which of the following increase the fertility of soil ?

A. Lactobacillus bacteria B. Rhizobium bacteria C. Spirogyra algae D. Blue-green algae

(a) A and B (b) B and C (c) A and D (d) B and D

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Solution

(d) B and D
Rhizobium bacteria lives in root nodules of legumes ,it fix atmospheric nitrogen and also converts it in to ammonia which helps in increasing of fertility of soil and growth of plants
Blue green Algae fix nitrogen directly from atmosphere ,and increase the fertility of soil.

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Which of the following increase the fertility of soil ? A. Lactobacillus bacteria B. Rhizobium bacteria C. Spirogyra algae D. Blue-green algae (a) A and B (b) B and C (c) A and D (d) B and D

(d) B and DRhizobium bacteria lives in root nodules of legumes ,it fix atmospheric nitrogen and also converts it in to ammonia which helps in increasing of fertility of soil and growth of plantsBlue green Algae fix nitrogen directly from atmosphere ,and increase the fertility of soil.

Which of the following increase the fertility of soil ?

A. Lactobacillus bacteria B. Rhizobium bacteria C. Spirogyra algae D. Blue-green algae

(a) A and B (b) B and C (c) A and D (d) B and D

(d) B and D
Rhizobium bacteria lives in root nodules of legumes ,it fix atmospheric nitrogen and also converts it in to ammonia which helps in increasing of fertility of soil and growth of plants
Blue green Algae fix nitrogen directly from atmosphere ,and increase the fertility of soil.