Question

why are different methods necessary for dry land areas

Answer 1

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Techniques include summer fallow rotation (in which one crop is grown on two seasons' precipitation, leaving standing stubble and crop residue to trap snow), and preventing runoff by terracing fields. ... Moisture can be conserved by eliminating weeds and leaving crop residue to shade the soil.

Answer 2

1.conserving rainfall that the areas receives is the first step.                                                                                 2.there are several ways that people can stop rain water from quickly running off. so that it can soak into the ground and recoverage the ground water 3.this is done through water shed progremmes which incluide afforestation, bunding building check dams and tanks