Recent questions and answers in Microbes in Humal Welfare

Biological magnification refers to

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Which of the following elements helps in $N_2$ fixation in the roots of leguminous plants?

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Biofertilisers give better yield when added along with

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Which is the best fertilizer?

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Biological control of pest is

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A fern commonly found in rice field is

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The aquatic fern,which is an excellent biofertilizer is

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Due to which of the following organism,yield of rice is increased?

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Farmers have reported 50% higher yield of rice by using fertiliser

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Which one is a nonsymbiotic nitrogen fixer?

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Third generation pesticides are

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If wheat field is inoculated with Rhizobium

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Symbiotic nitrogen fixation in root nodules of some legumes is caused by

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Which of the following can use molecular nitrogen as nutrient?

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Yield of paddy field can be increased by application of

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Biofertilisers include

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Which of the following is free-living aerobic and nonphotosynthetic nitrogen fixing bacterium

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Crop rotation is carried out for

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The phenomenon of using a predator for controlling a pest is

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Azotobacter and Bacillus polymyxa are

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Leghaemoglobin occurs in

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Nitrogen-fixation is

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Which element plays an important role in nitrogen -fixation

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BGA is chiefly used as fertiliser in

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Mycorrhiza represents

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VAM represents

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Biological control of pests is

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Which is correct

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Root nodules for nitrogen fixation of a nonleguminous tree possess

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Nitrogen content of urea is

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What is required for nitrogen-fixation by Rhizobium

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The best fertiliser for paddy is

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Composed manure is produced from

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Green manuring enhances crop yield by

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Sporeine was developed in

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First bioinsecticide developed on commercial scale was

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Rhizosphere is the region where

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The earliest pesticide was

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Pyrethrin is extracted from

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Which one is an effective plant insecticide

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VAM is

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Azolla enriches rice fields with nitrogen due to its association with

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Ladybug is a predator of

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Most active nitrogen-fixing blue green alga of rice fields is

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Rotenone is

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Antifeedant property occurs in

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Thurioside is

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