Wallace Laboratories
365 Coral Circle
El Segundo, CA 90245
We tested a sodic, saline clay from the Old Ranch Country Club
in Seal Beach, Orange County, California with TERRA4M
. The soil has a pH of 8.00 and an ECe of 3.13 millmho/cm
@25 degrees C.
The soils was dried, sieved through a 2mm screen and placed into
columns per the technique described in method 34b of the Agricultural
Handbook No. 60 of the US Department of Agriculture. The soils were
irrigated with deionized water and then dried in order to form a
crust and compact the soils.
The treatments were:
1. TERRA4M applied at
the equivalent rate of 1 gallon per 1,000 square feet. The TERRA4M
was diluted with water at the equivalent rate of
20 gallons.
2. TERRA4M applied at
the equivalent rate of 1 gallon per 5-foot by 5-foot as per the
instructions for the preparation of planting pits. The TERRA4M
was diluted with water at the equivalent rate of
20 gallons.
3. A control.
After the TERRA4M was
applied, the soil in the columns was dried and then leached with
8 inches of water. The water was pH 7.84, ECw 0.517, SAR 1.62, calcium
25.8 ppm, magnesium 11.5 ppm, and sodium 55.6 ppm. The treatment
were tested in triplicate. The statistical anova data were calculated
with Systat version 5.0.
Results
The hydraulic conductivity after eight inches of applied water
was 5.2 times higher with TERRA4M
applied in treatment 2 than in the control.
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