Question

Blue-green algae are mainly used as biofertilizers in the field of which crop?
A. Wheat
B. Gram
C. Paddy
D. Maize

Answer 1

Hint: Bio-fertilizer is a substance which incorporates living microorganisms which, while implemented to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promote increase by growing the supply or availability of number one vitamins to the host plant. Blue-green algae come under a vast range of microbes present in abundance in nature.

Complete answer: Biofertilizers added nutrients via the herbal techniques of nitrogen fixation, solubilizing phosphorus, and stimulating plant boom through the synthesis of growth-promoting substances. The microorganisms in biofertilizers restore the soil's natural nutrient cycle and construct soil natural count numbers. Through using biofertilizers, flowers may be grown, even improving the sustainability and the fitness of the soil. Biofertilizers can be anticipated to lessen the usage of synthetic fertilizers and pesticides, but they're no longer but capable of replacing their use. Since they play several roles, a favoured clinical term for such useful bacteria is "plant-increase selling rhizobacteria as (PGPR).
Heterocysts are non-dividing cells that have misplaced the potential of oxygenic photosynthesis and comprise the enzyme nitrogenase, which helps to fix atmospheric nitrogen. BGA which includes Anabaena, Nostoc, and Calothrix were located to be broadly dispersed throughout the rice-growing tracts besides in acidic soils of Kerala, Assam, and parts of Tamil Nadu.
The correct answer is an option (C),i.e., Paddy.

Note: Blue-green algae are famous biofertilizers because of their innumerable benefits to the agro-environment. The algal biofertilizers are environment friendly, in contrast to chemical fertilizers that damage the surroundings. They are reasonably-priced alternatives as they require low-cost inputs. Although they do not show instantaneous results they display cumulative effect after three-four years.