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Nutrient Management

Learn how to estimate land requirements for optimal manure usage and nutrient management in agricultural cropping systems. Understand the impact of waste treatment systems on available nutrients. Make informed decisions based on crop types, tillage systems, and manure decomposition periods.

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Nutrient Management

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  1. Nutrient Management Adapted CNMP Core Curriculum Section 5.3 – Estimating Land Requirement Presented by: Roberto Maisonnave, Ag Engineer & M. Sc. International Environmental Consultant robermaison@hotmail.com www.ambientagro.com

  2. Objectives • Relation between number of pigs with crop land needed for the agronomic usage of manure. • Impact of your waste treatment system in the annual volume of available manure and nutrients. • Relevance of the agricultural cropping system in your manure management plan.

  3. Manure Nutrients Production • These values are only a function of animal type, live weight and diet • Relatively uniform within a reasonable range

  4. Treatment & Storage N & P

  5. Land Application SystemAL vs ST

  6. Available Nutrients Summary • AL: Anaerobic Lagoon • SI: Sprinkler Irrigation • UI: Underground Injection PAN*: Plant Available Nitrogen

  7. Cropping System • Crops / year: Corn, Wheat/Soybean, garden crops • Tillage system • Fallow period • Decay time for manure decomposition (direct human consumption crops)

  8. Land Requirement Example #1 • 10.000 kg/ha Corn @ 22 kg N/ton grain • N-based application

  9. Land Requirement Example # 2 • 10.000 kg/ha Corn, 4.500 kg/ha Soybeans

  10. Unbalance Manure N/P ratio • Generally, • Manure: 5N / 1P • Crop Uptake: 3N / 1P • N based application: P over application • P based application: N shortage

  11. Summary • 5.000 Finishing Site will produce a fairly constant amount of manure, nitrogen and phosphorus. • Select a Treatment & Storage and Land Application System that not only comply with Environmental Regulations but also fit in your agricultural production scenario.

  12. Summary • Cropping system is flexible but SOIL AG POTENTIAL is not. • Be realistic about crops and yields. • Different crops and rotations for different soil nutrient scenarios.

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