. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. Investigations at Burlington, Colorado. 67 increased but slightly. Although the soil was very hard and dry and was removed with exceedingly great difficulty, it could be plainly seen that the wonderfully developed roots thoroughly occupied every cubic inch where available water was present. Oats, Avena sativa. Oats were also examined on June 12. The crop had an average height of 10 inches, although some plants were 13 inches tall. The tillering was not heavy; 2 or 3
. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. Investigations at Burlington, Colorado. 67 increased but slightly. Although the soil was very hard and dry and was removed with exceedingly great difficulty, it could be plainly seen that the wonderfully developed roots thoroughly occupied every cubic inch where available water was present. Oats, Avena sativa. Oats were also examined on June 12. The crop had an average height of 10 inches, although some plants were 13 inches tall. The tillering was not heavy; 2 or 3 tillers was an average number, while very rarely more than 5 occurred. Young tillers were infrequent. While the crop was in fairly. Fig. 30.—Oats at maturity, Burlington, 1921. good condition, many plants were somewhat fired at the base. Some of the older leaf-tips showed effects of frost injury. As a result of the drought the leaves were more or less rolled, but scarcely to the extent of those of wheat or barley, some of which did not become turgid at night. Some of the longest roots extended to a depth of feet where very dry soil occurred. The working depth was the same as for wheat, feet. The root habit, as regards surface lateral spread, abundance of roots at all angles to the vertical, and profound branching to the very root-ends, was very similar to that of wheat, but of slightly less degree m every 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
Size: 1591px × 1571px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectcropsan, bookyear1922
