Soil Quality - USDA

soil QualityTest Kit GuideUnited StatesDepartment ofAgricultureAgriculturalResearch ServiceNatural ResourcesConservation ServiceSoil Quality InstituteJuly 2001 Trade names are used solely to provide specific information. Mention of a trade name does not consti-tute a guarantee of the product by the Department of Agriculture nor does it imply endorsementby the Department or the Natural Resources Conservation Service over comparable products that arenot Department of Agriculture ( usda ) prohibits discrimination in all its programs and activities onthe basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orienta-tion, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabili-ties who require alternative means for communication of program information (Braille, large print,audiotape, etc.) should contact usda s TARGET Center at (202) 720-2600 (voice and TDD).

Sampling Guidelines Important: When, where, and how deep to sample and how many samples to take is primarily dependent on the questions being asked or problems being addressed by the farm or land manager. When to sample? Timing of sampling is important, because soil properties vary within a season and with manage-ment operations, such as tillage.

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