Question

ch 2 NCERT CLASS 8 Q2, 3, 4D​

Answer 1

ans 2) The biggest issue facing the use of chemical fertilizers is groundwater contamination. Nitorgen fertilizers break down into nitrates and travel easily through the soil. Because it is water-soluble and can remain in groundwater for decades, the addition of more nitrogen over the years has an accumulative effect.

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ans 3) Benefits of earthworms. By their activity in the soil, earthworms offer many benefits: increased nutrient availability, better drainage, and a more stable soil structure, all of which help improve farm productivity. Worms feed on plant debris (dead roots, leaves, grasses, manure) and soil.

ans 4) viral infection.. ( I m not sure about this one)

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