. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. 54 Development and Activities of Roots of Crop Plants. ditions also prevailed throughout July. Well-distributed rains furnished abundant soil-moisture (table 10); soil and air temperatures and humidity were favorable (fig. 20), and evaporation was not excessive (table 11). The roots on the upland had penetrated to a maximum depth of feet and were fairly abundant to the level. Those on the lowland were slightly deeper. The greatest depth of penetration wa
. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. 54 Development and Activities of Roots of Crop Plants. ditions also prevailed throughout July. Well-distributed rains furnished abundant soil-moisture (table 10); soil and air temperatures and humidity were favorable (fig. 20), and evaporation was not excessive (table 11). The roots on the upland had penetrated to a maximum depth of feet and were fairly abundant to the level. Those on the lowland were slightly deeper. The greatest depth of penetration was feet and several occurred at the 5-foot level. In both areas the tap-root was the prominent. A Ei Fig. 25.—A. Alfalfa 132 days old. B. Sweet clover 115 days old. feature, varying from 3 to 5 mm. in diameter. Laterals were not abundant below the surface foot of soil. The longest did not exceed 6 or 8 inches. The roots penetrated nearly vertically downward and were furnished at irreg- ular intervals with short, mostly poorly branched or unbranched rootlets. These occurred at intervals of an inch or less, becoming smaller near the. 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 Weaver, John E. (John Ernest), 1884-1966; Jean, Frank Covert, 1880- joint author; Crist, John W. , joint author. Washington, Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcropsan, bookyear1922
