. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. 62 FIELD CROP PRODUCTION film moisture. The breaking up of the soil into fine particles also permits the air to enter the soil more freely and thus supply the root cells with oxygen, which they require just as do those plant cells above ground. Plants obtain their food by means of root hairs which are so delicate that they cannot penetrate the soil particles, but grow around them. Thus a soil composed of many fine. Fig. 16. — Plowing with a tractor. particles provides greater feed
. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. 62 FIELD CROP PRODUCTION film moisture. The breaking up of the soil into fine particles also permits the air to enter the soil more freely and thus supply the root cells with oxygen, which they require just as do those plant cells above ground. Plants obtain their food by means of root hairs which are so delicate that they cannot penetrate the soil particles, but grow around them. Thus a soil composed of many fine. Fig. 16. — Plowing with a tractor. particles provides greater feeding area for the plant than one made up of large particles. Another purpose of plowing is to incorporate with the soil the organic matter that it has accumulated on the surface or that is applied in the form of manure or by growing a green manure crop. The organic matter when mixed with the soil not only supplies it with plant food, but improves its physical condition, permitting better aeration and increasing its. 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 Livingston, George. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
