Question

Why are the different methods necessary for dryland areas​

Answer 1

Answer:

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.

Explanation:

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Answer 2

Answer:

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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.