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Published byDarleen Jade George Modified over 9 years ago
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Conesus Lake – Agricultural Implications
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Mandatory on all CAFO sized farms, over 1000 animal units Voluntary on dairy/livestock farms with 300 - 999 animal units Will be required (voluntary compliance) on all farms with animals by 2009 AEM Planning
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Key Elements of Plan Nutrient Management – soil fertility, fertilizers, manure, bio-solids, legume or cover crop generated nutrients Farmstead water management – roof water, open barnyards, silage storage Soil management/erosion control
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P application using inorganic P and/or manure shall be consistent with either: P index - risk determination. P threshold - if soil test P (STP) > saturation, no P. Agronomic soil test - if soil test says no P needed, then no P is to be added. The P index gives the greatest flexibility. The P index is a better risk indicator than STP and threshold. P Index NRCS Code 590:
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P indices are being developed in many states. NY, MD, PA, DE and VT all have draft P indices. A regional group is working on unification of the P index for the NE. Sharpley and Beegle, 1999. P Index
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Soil test P (Morgan in lbs P/acre) Distribution (% of total sample size) New York State (72669 samples) 50.5% P Index
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Just because soil P is high, does not mean it reaches ground and/or surface water. 90% of soluble P comes from 10-20% of a watershed (Gburek, USDA-ARS). The P index allows for the identification (and subsequent management) of these high risk fields. P Index
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Source/Transport Concept High P Source Level High Transport Risk Critical Source Area P Index
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Sharpley and Beegle, 1999. Soil test as “source” indicator. Stream proximity as “transport” indicator. P Index
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Soil Test Results Phosphorus levels – low to very high Soil pH Organic matter Calcium – Magnesium; buffer capacity Other elements
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Manure Systems Daily spread vs. storage Manure Systems Daily spread vs. storage
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