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प्रश्न
Give reasons.
Soil is turned over during tilling.
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उत्तर
Soil is turned over during tilling to bring the nutrient-rich lower layers of soil to the surface and to loosen the soil so that air and water can easily reach the roots of plants.
संबंधित प्रश्न
Explain the uses of micro-organisms.
Nowadays, ___________ are used for treatment of diarrhoea and treatment of poultry also.
Biodegradable plastic used for storing the garbage.
Microbes have the natural ability of decomposing the man-made chemicals.
Antibiotics cannot be obtained from a variety of bacteria and fungi.
Why does the process of dirt removal occur in detergents even at low temperature?
Write a short note.
Bioinsecticides
Complete the paragraph by selecting the appropriate option in parentheses.
(energy, microbial, erosion-proof, reused, purification, environmentally friendly)
Nowadays, instead of chemical catalysts, _______ enzymes are used in the chemical industry. These enzymes are active at low temperature, pH and pressure; due to which _______ is saved and _______ instruments are also not necessary. Enzymes carry out specific processes; hence unnecessary by-products are not formed due to which expenses on _______ are minimised. In case of microbial enzymatic reactions elimination and decomposition of waste material is avoided and enzymes can be _______ Hence, such enzymes are _______.
State whether true or false. If false, correct the statement.
Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.
Baker’s yeast is ______.
