Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria
Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria
- A
$N_{2}$-fixer microbes
- B
Prokaryotic organism
- C
Both $(a)$ and $(b)$
- D
Eukaryotic organism
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Why are blue green algae not popular as biofertilisers ?
Why are blue green algae not popular as biofertilisers ?
Aquatic fern which is an excellent biofertilizer
Aquatic fern which is an excellent biofertilizer
- [AIPMT 2001]
Consider the following statements about organic farming
$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships
$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm
$III.$ Organic farming protects the environment, minimize soil degradation and erosion and decrease pollution
Which of the statements given above are correct?
Consider the following statements about organic farming
$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships
$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm
$III.$ Organic farming protects the environment, minimize soil degradation and erosion and decrease pollution
Which of the statements given above are correct?
The symbiotic association of fungi with plants is known as ____which is formed by many members of the fungal genus_____.
The symbiotic association of fungi with plants is known as ____which is formed by many members of the fungal genus_____.
A water fern, which is used as a green manure in rice fields is
A water fern, which is used as a green manure in rice fields is