Leaves of which plant can sharpen the memory?
Asparagus
Adhatoda
Aloe vera
Ocimum
Leaves of Ocimum(tulsi) can sharpen the memory and are also used as nerve tonic.
Composited manure is formed from
What gases are produced in anaerobic sludge digesters?
Green manuring enhances crop yield by
Disadvantages of chemical agents are
$I.$ chemicals are toxic and harmful to human beings and animals
$II.$ chemicals pollute the environment and plants
$III.$ weedicides used to remove weeds also pollute the soil
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