Question

which type of relationship did we observed to
increase soil fertility​

Answer 1

Answer:

The fertility of many soils which are not suitable for plant growth can be enhanced many times gradually by providing adequate irrigation water of suitable quality and good drainage from the soil.

Answer 2

Answer:

have a nice day mate(ʘᴗʘ✿)

Explanation:

Preserving organic matter by preventing erosion, minimizing extraction from the field (such as hay or silage harvest), and increasing the proportion of crop residues or green-manure crops in the sequence can enhance the long-term soil organic matter levels and overall soil quality.