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Soil and manure testing

Soil and manure testing. Amber Moore, Ph.D. University of Idaho. Managing nutrients… Soil testing. Collected to represent Conservation Management Unit Time allowed between sampling and planting (Code 590) Within 3 months for NO3-N and NH4-N Within 9 months for P, pH, OM, free lime, and EC.

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Soil and manure testing

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  1. Soil and manure testing Amber Moore, Ph.D. University of Idaho

  2. Managing nutrients…Soil testing • Collected to represent Conservation Management Unit • Time allowed between sampling and planting (Code 590) • Within 3 months for NO3-N and NH4-N • Within 9 months for P, pH, OM, free lime, and EC

  3. Conservation Management unit

  4. Soil sampling – How many?

  5. Soil sampling - Depth • For all parameters • One foot depth • Greatest abundance of plant roots • Largest concentration of nutrients • For mobile nutrients (Nitrogen, Sulfur, and Boron) • One foot increments to rooting depth

  6. Soil testing - lab analysis • Double/triple check results at multiple labs, both government and private • Stay in your region • Soil test methods change depending on general soil characteristics • Example – Soil test P • Mehlich III method for acid soils, Olsen method for alkaline soils • Calcareous soils in our region • Utilize labs in Idaho, Nevada, Utah, Montana, Wyoming, Eastern Washington, Eastern Oregon

  7. Managing nutrients…Manure testing • Manure testing is crucial – variability too great • Test before every growing season

  8. Labs that test manure • Must be NAPT-MAP or NAPT-CAP approved • http://ghex.colostate.edu/map/ • Stuckenholtz laboratory – Twin Falls, ID • USU Analytical Lab. – Logan UT

  9. Taking a representative manure sample • Manure and Wastewater Sampling • Sheffield and Norell • Lagoon, compost, stockpile sampling • http://info.ag.uidaho.edu/pdf/CIS/CIS1139.pdf

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