PSI/UM-PMT. New Info Needs, New Aids, Transitioning & Software Tools. Trish Steinhilber University of Maryland
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1 PSI/UM-PMT New Info Needs, New Aids, Transitioning & Software Tools Trish Steinhilber University of Maryland
2 Key Topics new and modified components learning aids for new components process for providing PSI and UM-PMT info for 2014 brief look at software
3 Foundational Data: Soil many counties soils have been reclassified and remapped all counties soils information has been updated published hard-copy soils surveys are out of date Web Soil Survey is now source of upto-date soils info
4 Essential Info Tied to Soil soil erodibility permeability class drainage class hydrologic soil group (HSG)
5 Dominant Map Unit soil map unit with the greatest percentage area in a field exception multiple phases of the same type? combine areas of same types GgA 30%; GgB 30%, MaB 40% choose GgB for dominant map unit copy of map and map unit summary should be in client s file
6
7 New! Degree of Phosphorus Saturation (DPS) relationship between P and Al & Fe in an oxalate extraction amorphous oxides believed to contain the reactive surfaces responsible for adsorption estimated via Mehlich-3 P, Al and Fe transformed back to oxalate basis DPS M3 = [P /(Al_+ Fe)]
8 MDA will allow the estimation of DPS/PSR for an interim period
9
10 Laboratory DPS Saturation Al M-3 & Fe M-3 U Del AgroLab Spectrum Brookside Other labs will provide information when requested and for an additional charge
11 Significantly Updated: Distance to Water (D2W) and Buffers determined separately 3 buffer choices D2W of interest has expanded to 500 combined to form Distance-Buffer Factor (DBF)
12 DBFs (Table 1) Distance to Surface Water Buffer Width & Type <35 >35 >50 NRCS < >
13
14 NuMan Pro 4 (particulate)
15 Significantly Updated: Application Method and Timing (AM) separate considerations for runoff (AM r ) and subsurface drainage (AM sub ) more extensive information needed on tillage utilized conventional or conservation tillage? soil mixing or no soil mixing when incorporated?
16 AM sub (Table 3) AM r (Table 4) no P applied incorporated within 5 days, w/soil mixing, Mar Nov incorporated within 5 days, w/soil mixing, Dec Feb surface-applied or subsurface app., no mixing, Mar Nov surface-applied or subsurface app, no mixing, Dec Feb no P applied subsurface placement or immediate full incorporation 1 (>90% residue) incorporated 2 w/in 5 days and 50% residue surface applied Mar Nov OR incorp. 3 > 5 days OR <50% residue surface applied or incorporation > 5 days, Dec-Feb 1 = injection; 2 = conservation tillage, 3 = conventional tillage
17 Documenting P Risk Data
18 PMT Paradigm Management Runoff + + Management Management Transport Source Transport Source Transport Source Particulate Subsurface Drainage Particulate + Runoff + Subsubsurface Drainage
19 NuMan Pro 4 (particulate)
20 NuManPro 4 (runoff)
21 NuManPro 4 (subsurface)
22 UM-PMT Interpretation (Table 9) Score low (0-50) medium (51-100) high (>100) Interpretation P applications shall not exceed P removal over the three-year period; can t exceed N rec of crop to which it is applied P removal the year of application No P can be applied
23 Beware Circularity! a P loss rating does not necessarily allow you to make the application used in the calculation check to assure that rate is consistent with restriction if medium, P-removal is max rate if pre-set and N-based rate exceeds 3-yr P- removal rate, recalculate with a lower rate
24 Dual P Risk Assessments PSI regulatory tool for 2014 plans UM-PMT instructional anticipated regulatory tool for 2015 plans
25 Most Efficient Route Use NuMan Pro 3 choose conditions for 2014 plans print PSIs for impacted fields & save import file into NuMan Pro 4 check crop codes for accuracy print remaining output, including UM-PMT complete comparison table
26 P Risk Assessment Comparisons
27 The PSI Software Story independent software application 2001 integrated into NuManPro in 2004 NuMan MD PSI simplified RUSLE v.1
28 PSI and UM-PMT (stand-alone) demand for UM-PMT separate from NuMan Pro need to provide stand-alone PSI for 2014 current soil files Phosphorus Source Coefficient PSC (2005) simplified RUSLE v.1
29
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31 extension.umd.edu/anmp Check it out!
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