It increases the warmth of the soil

It increases the warmth of the soil

It increases the warmth of the soil

6. It increases the warmth of the soil.

7. It permits earlier working in spring and after rains.

Fig. 9. Laying a Tile Drain

8. It favors the growth of germs which change the unavailable nitrogen of the soil into nitrates; that is, into the form of nitrogen most useful to plants.