Main Title |
Water Flow in Soil in Presence of Soybean Root Sinks. |
Author |
Ary, Lalit Mohan ;
|
CORP Author |
Minnesota Univ., Minnepolis. Water Resources Research Center. |
Year Published |
1973 |
Report Number |
WRRC-Bull-60; DI-14-01-0001-1916; OWRR-B-015-Minn; 14367,; B-015-Minn(7) |
Stock Number |
PB-223 505 |
Additional Subjects |
( Soil water ;
Soybean plants) ;
( Soybean plants ;
Water loss) ;
Evapotranspiration ;
Hydraulic conducitivty ;
Irrigation ;
Soil profiles ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-223 505 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
177p |
Abstract |
Water depletion patterns in the ten to 70-cm soil depth in the root zones of two soybean varieties, 79.648 and Chippewa-64, and in a bare soil were established on Waukegan loam. Soil hydraulic properties of the soil profile, suction-water content and hydraulic conductivity-suction relationships were determined in the laboratory and supported by field measurements. Following irrigation, proportional contribution of various soil layers to the total water loss showed a downward shift with the growth state of soybeans. In general, ten-cm layers in the upper horizons contributed a major portion to the total water losses. The contribution of the ten to 20-cm layer remained above 20% while that of the 50 to 60-cm layer accounted for less than 10% of the total water loss from the ten to 70-cm profile. During the early stages of growth the evapotranspiration rate was 0.64 cm/day which agrees with the pan evaporation rate of 0.66 cm/day. Soil outside the ten to 70-cm zone contributed about 0.2 cm/day towards evapotranspiration. About 55% of the soil volume showed root densities of one to two cm/cu cm. Generally, root density tended to be higher near the plant rows and between the 25 and 45-cm depths below the surface. |
PUB Date Free Form |
Jun 73, |
Category Codes |
8H; 2D; 52E; 98D |
NTIS Prices |
PC E07/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326566639 |
Origin |
NTIS |
Type |
CAT |