||Characteristics of the Soil Matrix That Affect Water Storage and Movement.
Blak, George R. ;
||Minnesota Univ., Minneapolis. Water Resources Research Center.
||DI-14-01-0001-1916; OWRR-B-015-Minn; 14467,; B-015-Minn(8)
( Soil structure ;
Soil aggregates ;
Soil water ;
Hydraulic conductivity ;
Soil chemistry ;
Research projects ;
Soybean plants ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||The objectives of the research project were to investigate: Water storage and release from the soil as related to the matrix characteristics; and reactions occurring between water, clay and quartz during initiation, growth and stabilization of domains in the soil matrix that affect the storage and movement of water. It was shown in careful laboratory measurements that soil matric suction increased with time in pulverized, moistened, pressed soil sealed to prevent water loss. Water stability also increased with time for simulated aggregates formed by extrusion under pressure. Time-dependent suction and stability increases suggest spontaneous shift from face-face to edgeface orientation of clay in the matrix. An interesting field application that increased the soil moisture storage reservoir was established on two sandy soil types where moisture deficiency is the principal yield-limiting factor. Treatment consisted of plowing in a nearly continuous, hot sprayed asphalt barrier 55 cm deep in two replicated experiments. Various vegetable crops were grown.
||Describes several related research projects dealing with the interactions of soil properties with soil moisture content and movement.
|NTIS Title Notes
||Project completion rept. 1 Jan 69-30 Jun 73.
|PUB Date Free Form
||2C; 8M; 48E#; 98C; 52J
||PC A03/MF A01