Secondary tillage is used to improve the seedbed by increased soil pulverization, to conserve moisture through the destruction of weeds, and to cut up crop residues. It is accomplished by use of various types of harrows, rollers, or pulverizes, and tools for mulching and fallowing.
Plough is a tool used for the initial cultivation of the soil for the preparation of the sowing. It is not a secondary tillage implement.
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Deficiency of Vitamin A causes
The formula for Ethane is
The building units of oligosaccharides and polysaccharides are
The spectral bands used in Greenness Vegetation Index are (A) Red (B) Blue (C) Green (D) NIR (E) MIR
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The consumption of water containing high levels of nitrate–N can lead to
The WHO standard of drinking water for nitrate is
Emissivity of a black body is
The common table sugar is
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