The First Book of Farming by Charles Landon Goodrich
page 62 of 307 (20%)
page 62 of 307 (20%)
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is one of the greatest factors if not the greatest in the growth of
the crop. The power to absorb or soak up moisture from any source is greatest in those soils whose particles are smaller and fit closer together. It is for this reason that strong loams and clay soils absorb and hold three times as much water as sandy soils do, while peaty or humus soils absorb a still larger proportion. The reason why crops burn up so quickly on sandy soils during dry seasons is because of their weak power to hold water. The clay and humus soils carry crops through dry weather better because of their power to hold moisture and to absorb or soak up moisture from below. It is for this reason also that clay and peaty soils more often need draining than sandy soils. When rain falls on a sandy soil it enters readily, but it is apt to pass rapidly down and be, to a great extent, lost in the subsoil, for the sand has not sufficient power to hold much of it. When rain falls on a clay soil it enters less readily because of the closeness of the particles, and during long rains or heavy showers some of the water may run off the surface. If the surface has been recently broken and softened with the plow or cultivator the rain enters more readily. What does enter is held and is not allowed to run through as in the case of the sand. Humus soil absorbs the rain as readily as the sand and holds it with a |
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