HomeMy WebLinkAbout6020; MARBELLA WALL BEAUTIFICATION; SOILS REPORT; 2010-07-0107/01/2010 14:01 FAX 310 840 8863 WALLACE LABS CO CO
WALLACE LABORATORIES, LLC
365 Coral Circle
El Segundo, CA 90245
phone (310) 615-0116 fax (310) 640-6863
)uly 1, 2010
Fax 619/291-0482
Palm Engineering
3770 Hancock Street, Suite H
San Diego, CA 92110
RE: Marbella Wall Project
Dear Veronica,
The soil is highly alkaline with a pH of 9.37. Limestone is present which induces iron
deficiency in acid-loving plants. The salinity is low at 0.79 millimho/cm. Nitrogen,
phosphorus and potassium are all low. The sodium absorption ratio (SAR) is slightly
elevated at 4.6.
Recommendations
For toil preparation on a square foot basis, homogeneously broadcast the following at the
indicated rates. Rates are per 1,000 square feet. Incorporate them 6 inches deep:
Potassium sulfate (0-0-50) .- 8 pounds
Triple superphosphate (0-45-0) —4 pounds
agricultural gypsum - 20 pounds
good quality soil amendment - as needed to condition the soil,
For the preparation on a volume basis, homogeneously blend the following materials into
the soil. Rates are expressed per cubic yard:
Potassium sulfate (0-0-50) - 1/3 pound
Triple superphosphate (0-45-0) - 1/4 pound
agricultural gypsum - 1 pound
good quality soil amendment - as needed to condition the soil
Preleach prior to planting and lower the pH of the soil to less than 8. Lower the SAR to
less than 4. After leaching, apply ammonium sulfate (21-0-0) at 5 pounds per 1,000
square feet. Normally irrigate deeply but not ftequently.
For site maintenance, apply 12-12-12 at 8 pounds per 1,000 square feet about quarterly.
Monitor the site with periodic soil testing. Adjust the maintenance program as needed.
Apply gypsum if needed. Correct iron deficiency if it develops with Becker Underwood
Sprint 138 Fe or other FeEDDHA chelated iron.
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Soil Arialyses Plant Analyses Water Analyses
J001/00D,O
4,02o
The ECe is a measure of (milli- IP I 0.79 4'4'
the soil salinity:
11-2 affects a few plants calcium 33.1
12-4 affects some plants, magnesium . 6.9
[>4 affects many plants. sodium 112.3
potassium 6,8 - cation sum
problems over 150 ppm chloride . 32
good 20- 30 ppm nitrate as N 2
phosphorus as P 0.1
toxic over 800 sulfate as 75.1 - - anion sum
toxic over I for many plants boron as B 0.16 4'
increasing problems start at SAR I 4.6
est. gypsum requirement-lbs./1000 sq. ft. 14
fair/slow relative Infiltration rate
estimated soil texture sandy loam
lime (calcium carbonate) . high
organic matter low/fair
moisture content of soil 10.6%
half saturation percentage 13.8%
millicq/l
1.7
0.6
4.9
0.2
7,3
0.9
0.1
0,0
4.7
5.7
07/01/2010 14:01 FAX 310 640 6863 WALLACE LABS CO Co 11002/00D,
WALLACE LABS
365 Coral Circle Locati
El Segundo, CA 90245 Rcquc
(310) 615-0116 raph:c
ammonium bivarbonate/DTPA
extractable - mg/kg soil
Interpretation of data .
J.
S REPORT liPrint Date June 30, 2010
Marbella Wall Project
'ter Veronica, Palm Engineering
intcrprctation. 'very low, 4'4' low, 4' moderate
0 **hhe 1s**vcryhi&
Sample ID Number 10-181-15
Sample Deseriptior Soil Sample Reccived 6/20/2010
Receive Date 6/30/10
low medium high elements _j graphic
0-7 8-15 over 15 phosphorus 3.97 4'4'
0-60 60-120 121-180 potassium 56.53 4'4'
0-4 4- 10 over 10 Iron 19.54
0-0.5 0.6-1 over I manganese 2.31
0-1 1 - 1.5 over 1.5 zinc 1.36 4'4"
0-0.2 0.3-0.5 over 0.5 copper 1.12
0-0.2 0.2- 0.5 over I boron 0.26 4'4'
364.93 ratio of calcium to magnesium calcium
needs to be more than 2 or 3 magnesium 79.59
82.30 4'4' should be less than ootassium sodium
sulfur - 59.70 4'4'
molybdenum n d 4'
nickel 0,04 4'
aluminum 0.20 4'
arsenic 0.11 '
barium 0.66 *
cadmium 0.02 4'
chromium 0.08 4'
cobalt 0.05 4'
lead 0,41 '
lithium 0.22 *
mercury ' n d 4'
selenium n d *
silver n d
strontium 1.61 4'
tin n
vanadium 0.39 *
The following trace
elements may be toxic
The degree of toxicity
depends upon the pH of
the soil. Soil texture,
organic matter, and the
concentrations of the
individual elements as wail
as to their interactions.
The pH optimum depends
upon soil organic
matter and clay content.
for clay and loam soils:
under 5,2 Is too acidic
6.5 to 7 is ideal
over 8.0 Is too alkaline
Elements are expressed as niglkg dry soil or mgil for saturation extract.
pH and ECe are measured In a saturation paste extract. nd means not detected.
Analytical data determined on Soil fraction passing a 2 mm slave.