(a) List any two benefits of using fertilizers. What will happen when they are used continuously and excessively ? (b) What materials are used in organic farming instead of chemical fertilizers ?
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Benifits-
*Crops grow faster
*It also shades out weeds more effectively, reducing the need for herbicides.
If used continuously, they degrade the soil and cause water pollution
If used excessively they cause The excessive use of nitrogen-containing fertilizers (be they synthetic or natural) is particularly damaging, as much of the nitrogen that is not taken up by plants is transformed into nitrate which is easily leached.
Dead plants and organic matter is used to make organic manure.
*Crops grow faster
*It also shades out weeds more effectively, reducing the need for herbicides.
If used continuously, they degrade the soil and cause water pollution
If used excessively they cause The excessive use of nitrogen-containing fertilizers (be they synthetic or natural) is particularly damaging, as much of the nitrogen that is not taken up by plants is transformed into nitrate which is easily leached.
Dead plants and organic matter is used to make organic manure.
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