Sample of a Soil Report!

WALLACE LABS SOILS REPORT Print Date Sep. 17, 2010 365 Coral Circle Location site El Segundo, CA 90245 Requester customer (310) 615-0116 graphic interpretation: * very low, ** low, *** moderate ammonium bicarbonate/DTPA * * * * high, * * * * * very high extractable - mg/kg soil Interpretation of data low medium high 0 - 7 8-15 over 15 0-60 60 -120 121-180 0 - 4 4 - 10 over 10 0- 0.5 0.6- 1 over 1 0 - 1 1 - 1.5 over 1.5 0- 0.2 0.3- 0.5 over 0.5 0- 0.2 0.2- 0.5 over 1 ratio of calcium to magnesium needs to be more than 2 or 3 should be less than potassium

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 well as to their interactions.

The pH optimum depends upon soil organic matter and clay contentfor clay and loam soils: under 5.2 is too acidic 6.5 to 7 is ideal over 9 is too alkaline The ECe is a measure of the soil salinity: 1-2 affects a few plants 2-4 affects some plants, > 4 affects many plants.

Sample ID Number Sample Description

elements phosphorus potassium iron manganese zinc copper boron calcium magnesium sodium sulfur molybdenum nickel aluminum arsenic barium cadmium chromium cobalt lead lithium mercury selenium silver strontium tin vanadium

10-259-22 Sample #2 Soil 9-14-10 graphic 12.78 **** 357.56 ***** 22.85 ***** 6.35 **** 10.04 ***** 9.18 ***** 0.20 *** 340.35 *** 363.25 ***** 374.10 ***** 367.09 *** 0.09 *** 1.05 ** nd * 0.03 * 0.31 * 0.11 * 0.05 * 0.14 * 3.78 ** 0.13 * nd * 0.51 ** nd * 1.47 * nd * 1.15 **

Saturation Extract pH value ECe (millimho/cm) calcium magnesium sodium potassium cation sum problems over 150 ppm chloride nitrate as N phosphorus as P toxic over 800 sulfate as S anion sum toxic over 1 for many plants boron as B increasing problems start at 6 SAR est. gypsum requirement-lbs./per 1,000 square feet infiltration rate inches/hour soil texture sand silt clay lime (calcium carbonate) Total nitrogen Total carbon carbon:nitrogen ratio organic matter based on carbon moisture content of soil half saturation percentage

ideal percentages of cations abt 5 % potassium millieq K < 3% sodium millieq Na abt 70% calcium millieq Ca 15 - 20% magnesium millieq Mg 5-10% hydrogen millieq H total millieq/100 grams

7.62 **** 2.42 **** 161.5 70.1 254.4 38.7 479 35 0.7 152.2

millieq/l 8.1 5.8 11.1 1.0 26.0 13.5 2.5 0.0 9.5 25.5

0.12 * 3.5 *** 101 2.99 clay gravel > 2 mm 16.5% 9.9% 29.6% 53.9% yes 0.092% 1.161% 12.6 2.32% 21.7% 45.0% % saturation 0.81 4% 0.85 5% 10.46 57% 4.46 24% 1.68 9% 18.26

Elements are expressed as mg/kg dry soil or mg/l for saturation extract. pH and ECe are measured in a saturation paste extract. nd means not detected. Sand, silt, clay and mineral content based on fraction passing a 2 mm screen.

Receive Date

9/16/10