Plz plz help geography question?

Question

how is excessive irrigation harmful to the soil?

why is it necessary to know landuse patterns?

Answer 1

1)Excessive irrigation would lead to soil Erosion

2)It leads to infertility as the top soil is leached along with the key nutrients like Mg,S,K,Na etc..

3)It leads to the loosening of the soil particles and sometimes water floods a certain area..

Landuse patterns must be known as it helps us in growing different types of crops also following different types of farming system and to revolutionize.