. Soils and plant life as related to agriculture . Agriculture; Soils; Plants. 28 SOILS AND PLANT LIFE 17. How we may get More Air into the Soil. — From the western limit of the Corn Belt to the Atlantic Ocean and in all the land subject to irrigation, there is need of plenty of air in the soil. This does not mean that large air spaces, such as are caused by clods or small piles of weeds or straw, are necessary ; it means rather that much. Fic. 9. — Farmer plo^ving. of the air which finds its way into the small spaces in mellow, well-tilled land is needed. The amount of air in the soil is infl
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. Soils and plant life as related to agriculture . Agriculture; Soils; Plants. 28 SOILS AND PLANT LIFE 17. How we may get More Air into the Soil. — From the western limit of the Corn Belt to the Atlantic Ocean and in all the land subject to irrigation, there is need of plenty of air in the soil. This does not mean that large air spaces, such as are caused by clods or small piles of weeds or straw, are necessary ; it means rather that much. Fic. 9. — Farmer plo^ving. of the air which finds its way into the small spaces in mellow, well-tilled land is needed. The amount of air in the soil is influenced first by cul- tivation or tillage; second, by manuring; third, by drainage; fourth, by rotation of crops. The plow turns up particles of soil which may have been shut off from a supply of air. Then, too, the bottom of the furrow is in direct contact with the air until it is covered on the next round.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Cunningham, Jules Cool, 1879-; Lancelot, William Henry, 1874-. New York : Macmillan