Soil tilth refers to select one:
a. ratio of bulk density to particle density
b. the moisture content at which a soil is best suited for tillage
c. the physical suitability of a soil for plant growth
d. the bearing strength of a soil under a given downward force
e. micro-aggregates produced as a by-product of tillage

Option (C)

Explanation:

The soil tilth is defined as one of the physical property that determines the necessary condition for the better growth of plants and crops.

This property depends upon various factors such as-

These are the main features that characterize the soil tilth, and fulfilling the above required necessary condition, a plant grows in a much better way.

Thus, the correct answer is option (C).

it takes about 30 days for it to break down