biology Benefits from biofertilizers 12 std botany study materials & notes
12th botany neet school

Benefits from biofertilizers

Benefits from biofertilizers

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1. Biofertilizers are easy to produce in abundance and are available
at low cost to the marginal farmers.

2. It increases soil fertility without causing any damage to the soil.

3. Application of biofertilizers increases yield upto 45 per cent and
the left over biofertilizers in the soil increases yield as long as the
biofertilizer remains in the soil up to 3 to 4 years.

4. Azolla, which is a biofertilizer amends the soil with organic matter.
Cyanobacteria in particular secrete growth promoting hormones
like indole 3-acetic acid, indole butyric acid, naphthalene acetic
acid, aminoacids, protein and vitamins to soil.

5. Cyanobacteria grow well both in acidic as well as in alkaline soils.
Since, cyanobacteria are potent neutralizers, they help in the
neutralization of soil. The process of converting untenable, fallow
land to cultivable soil is termed as soil reclamation. Blue green
algae play a vital role in this conversion.

6. Symbiotic nitrogen fixing Rhizobium is a biofertilizer. It adds 50
to 150 Kg of nitrogen to soil per hectare. Azatobacter and
Azospirillum secrete antibiotics which act as biopesticides.

7. Ectotrophic mycorrhiza, which acts as a biofertilizer, increases
the surface area of the roots of host plants, so that more absorption
of nutrients by the roots is made possible.

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Other links 

Plant physiology – photosynthesis and its significance


BIOLOGY IN HUMAN WELFARE Introduction & Food production


Aims of plant breeding


Aspects of plant breeding and Types


Hybridization in plant breeding


Polyploid breeding, Mutation breeding, Breeding for disease resistance


Genetic engineering, Improved varieties, Role of biofertilizers


Green manuring, Mycorrhiza as biofertilizer


Crop diseases and their control, Rice – Oryza sativa


Groundnut or peanut – Arachis hypogea


Citrus canker, Tungro disease of rice


Biocontrol of insect pests Bacterial pesticides


Genetically modified food


Bio war, Genetically Modified Organisms (GMO) in biological warfare


Biopiracy, Bioresources, Biomolecules, Biopatent, Biotechnology


Sustainable agriculture


Medicinal plants including microbes


Commonly Available Medicinal Plants


Microbes in medicine


Economic importance of Food plant Rice


Oil plant Groundnut Economic importance


Fibre plant – Cotton Economic importance


Timber yielding plant Teak Economic importance


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