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When using a soil testing lab outside of the Pacific Northwest, select a soil testing package that uses methods calibrated for Oregon soils. Soil test interpretation for Oregon soils may be difficult or impossible for soil tests not included in Tables 1 and 2; select a test package that contains OSU-recommended soil testing methods when possible.
) extraction method is used for soils east of the Cascade Mountain Range. Soil testing laboratories also use several other extraction methods. For interpretation of results from other extraction methods, contact the laboratory that performed the analysis. Soil test P extraction methods other than Bray P1 and Olsen often have little
OSU-recommended soil test methods. Soil pH: 1:2 soil pH. Buffer phH for lime requirement: Sikora or SMP method. Extractable phosophorous: Olsen extraction (for alkaline soils, primarily in Eastern Oregon or Bray P1 extraction (for acidic soils, primarily in Western Oregon) Extractable potassium, magnesium, sodium and calcium: ammonium acetate ...
Soil Testing. **2024 PAP Accredited Lab for Soil Testing (Performance Assessment Program) New pricing effective as of April 1, 2022. Please read the Fees Per Analysis PDF below or contact the lab (Soil.Lab@oregonstate.edu) if you have questions about fees. Basic and advanced nutrient analyses of garden and grower-scale submission size are ...
plant-available phosphorus. Soil testing laboratories also use several other extraction methods. For interpre-tation of results from other extraction methods, contact the laboratory that performed the analysis. Phosphorus soil tests are an index of P availability. The test values cannot be used to calculate available lb P 2 O 5 /acre.
Soil Testing. Soil testing is an important management practice on all farms, whether growing vegetables for fresh market or pasture for livestock. It’s nearly impossible to determine what a soil needs to be productive, without a soil analysis. There are many types of soil analyses available depending on what information you are seeking.
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How to take a soil sample... and why In Oregon, soil tests such as those conducted in the OSU soil testing laboratory will help you to develop and maintain a more productive soil and to increase net returns per acre by providing information on the available nutrient content and fertility status of the soil. This helps you to select the correct kind and amount of fertilizer and liming material ...
