Soil Sampling

SOILS:

A representative sample will consist of a composite of several sub-samples taken from the area under investigation. Equipment for sampling may consist of spade and bucket, auger, or a soil sampling tube.

The quantity of each soil sample submitted must be sufficient for appropriate analysis selected. Most analyses can be carried out on one pint ( 500 cc) of soil. Exceptions include A05 (one liter), A06 (2 liters) and M04 (three gallons). Accuracy REQUIRES adequate sample size.

If a soil tube is used, place a series of cores in a plastic bag. If a spade or a trowel is used, collect the sample in a plastic bucket, mix and then place a representative sample in a plastic bag. The best method of identifying the sample is to place the closed plastic bag in a paper bag and write the identification on the pager bag. NEVER, write information on paper and place in contact with moist soil.

Typical sampling depths:

In all cases, it is desirable to discard the surface inch of soil in order to avoid possible debris which is not part of the actual root zone. Where drip irrigation is used, take the sample directly beneath the emitter. Discard the upper 1 inches of surface soil.

PACKAGING SOIL SAMPLES

1. Place soil sample in a plastic bag. The place the plastic bag inside a pager bag.


2. Label the sample on the paper bag with an indelible marker. DO NOT place labels or notes inside the plastic bag in contact with humid soil.


3. Fill out the Sample Submittal Form. Consult with us if you need assistance with selection of appropriate analytical codes. Include the sample designation, block No., Lot No. or other designation, etc.).


4. Pack in a sturdy carton (cardboard box) with the samples closely packed. Loose packaging can result in soil spillage and/or box rupture. Enclose the Sample Submittal Form along with a copy of our U.S.D.A Soil Permit. Close securely.


5. Place our Shipping Label along with USDA PPQ-550 Permit on the exterior of the box and dispatch via Courier Service such as UPS, DHL, FED EX or similar to:
   SOIL AND PLANT LABORATORY, INC.
   352 MATHEW STREET
   INTERNATIONAL DIVISION – DEPT. 56-1
   SANTA CLARA, CALIFORNIA 95050
   U.S.A.
   Attn: Otto Lund
   Tel: 408-727-0330


6. Always include a Phytosanitary Certificate from your Ministry of Agriculture designating the country of origin. Attach a copy of the Phytosanitary Certificate to your Airway Bill and place another copy inside the box with the samples. The Phytosanitary Certificate should specify that the samples are destined for chemical analysis only and that the remains of such samples will be disposed of according to the regulations established by USDA.


7. Always send a confirming email, to:
   William Duran Jones
   International Division – Dept. 56-1
   soillaboakhurst@sierratel.com
   verifying the date of the shipment, the name of the courier, and especially the Tracking Number.

Please include a copy of the Sample Submittal Form with your email communication.