Water movement through Panoche clay loam soil

Abstract

with tensiometers. Some experiments have involved measurements of tension only, while others have included corresponding changes in soil water content. Investigations by Israelsen [1918] ,8 Israelsen and West [1922], Scofield and Wright [1928], and Edlefsen and Bodman [1941] typify early endeavors to ascertain the water-storage capacity of soils. Soil water was measured gravimetrically in field plots before and after heavy irrigations. In addition to the quantity of water stored, the amount of water passing through soil profiles during extended periods of drainage was measured. In the case of the latter investigation it was found that the average rate of water lost from a 5-foot profile over a period of 2 days after irrigation to 30 days after irrigation was approximately 0.1 inch per day. Using a neutron meter to measure soil water repeatedly at the same depths within several field profiles, Burrows and Kirkham [1958] studied the redistribution of applied water under the action of gravity to define field capacity. The field capacity of each 6-inch layer to a depth of 5 feet was defined on the basis of the shape of the drainage curves.

Effect of high frequency surface and subsurface drip irrigation on root distribution of sweet corn

“…Water retention properties are relatively uniform with depth. Detailed descriptions of the physical properties of this soil have been discussed by Nielsen et al (1964).…”

Alfalfa (Medicago sativa L.) water use efficiency as affected by harvest traffic and soil compaction in a sandy loam soil

“…The procedure used was similar to that of Nielsen et al (1964), which has been labeled by some as the "instantaneous profile method" (Watson 1966;Baker 1974). Soil moisture and tension, used to develop moisture-retention curves.…”

A software to calculate soil hydraulic conductivity in internal drainage experiments (SHC, Version 2.00)

“…After this, Nielsen et al (1964), Rose et al (1965) and Watson (1966) made pioneer contributions. This latter named the procedure for calculating hydraulic conductivity "the instantaneous profile method".…”