. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. 74 Development and Activities of Roots of Crop Plants. On July 1 no water was available in the surface 6 inches of soil, a week later only 1 or 2 per cent was available from 1 to 3 feet, while by the latter part of the month a deficit occurred to 2 feet and less than 1 per cent was available to 4 feet. Somewhat similar conditions prevailed late in August. Water relations at Burlington were even less favorable for plant growth than those TMR50AY FRIDAY. SATURDAY. SUND
. Development and activities of roots of crop plants; a study in crop ecology. Roots (Botany); Plant ecology; Crops and climate. 74 Development and Activities of Roots of Crop Plants. On July 1 no water was available in the surface 6 inches of soil, a week later only 1 or 2 per cent was available from 1 to 3 feet, while by the latter part of the month a deficit occurred to 2 feet and less than 1 per cent was available to 4 feet. Somewhat similar conditions prevailed late in August. Water relations at Burlington were even less favorable for plant growth than those TMR50AY FRIDAY. SATURDAY. Fig. 35.—Hygrothermograph records from Lincoln (upper) and Burlington, June, 1921; light lines temperature, heavy lines humidity. at Phillipsburg. While the surface foot was well moist during April, May, and early in June, only a small available supply (0 to 5 per cent) occurred in the second and third foot, while at no time during the season was the soil moist below the hardpan layer (about feet deep). An available supply of only 1 to 6 per cent was found at all levels above the hardpan throughout. 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
