Agronomy Technical Note 26 Appendix 1 PHOSPHORUS INDEX WORKSHEET WESTERN OREGON June 2013

Agronomy Technical Note 26 – Appendix 1 June 2013 PHOSPHORUS INDEX WORKSHEET – WESTERN OREGON

Producer: ______County: ______Tract No. ______Field No(s). ______Date: ______

Soil Map Unit(s): ______Soil Test P: ______ppm Lab. Method: ______Sample Depth: ______

Crop Rotation: ______Nutrient Application Method(s) ______

Planner: ______Notes: ______

Weighted Rating PHOSPHORUS LOSS RATING Value

TRANSPORT Factor None Low Medium High Very High FACTORS Weight (0) (1) (2) (4) (8) Current Planned

Annual Soil Erosion – (T/ac/yr) for the 1.50 < 1 1 – 3 4 – 6 7 – 15 > 15 year(s) of the nutrient ______application. (0) (1.5) (3.0) (6.0) (12.0) Application rate = infiltration rate OR Application rate Soil Erosion from Application rate < Little to no > infiltration rate 0.75 Sprinkler Irrigation infiltration rate OR visible OR Application rate > infiltration rate No sprinkler irrigation No visible runoff at runoff at Visible runoff at OR field borders field borders field borders Excessive runoff visible at field borders. Rills and gullies present. (0) (0.75) (1.5) (3.0) (6.0) ______

Runoff Class 1.00 Negligible Very low or low Medium High Very High (0) (1.0) (2.0) (4.0) (8.0) ______

Flooding Frequency 0.75 None or very rare Rare Occasional Frequent Very Frequent Class (0) (0.75) (1.5) (3.0) (6.0) ______200 – 299 feet > 500 feet OR OR 300 – 500 feet buffer 10 100 – 199 feet Distance to Perennial < 100 feet buffer > 30 ft. wide OR -19 ft. wide AND Surface Waters / 0.75 AND (or meets NRCS buffer 20 - 30 ft. wide next to buffer < 10 ft. Buffer Widths standards) next to next to surface surface wide next to No buffer next to surface waters surface waters waters waters surface waters (0) (0.75) (1.5) (3.0) (6.0) ______Subsurface Drainage 0.50 Tile drains present Tile drains Tile drains Tile drains present ______No Tile Drains Soil Test P (Bray P1) present present Soil Test P (Bray P1) > 190 ppm < 60 ppm Soil Test P Soil Test P (Bray (4.0) (0) (0.5) (Bray P1) 61 P1) 141- 190 - 140 ppm ppm Agronomy Technical Note 26 – Appendix 1 PHOSPHORUS INDEX WORKSHEET – WESTERN OREGON June 2013

(1.0) (2.0)

Transport Factors Subtotal (TFS) PHOSPHORUS Tract LOSS RATING Fields SOURCE None Low Medium High Very High Factor Weight Weighted Rating Value Current Planned FACTORS (0) (1) (2) (4) (8) (Soil Test P – 40) x 0.10 ( ______- Soil Test P – 40) x 0.10 = ppm 1.00 ______(Bray P1) Assign 0 points if Soil Test P < 40 ppm

Soil Test P ______

Commercial P ______x Fertilizer 1.00 Application Rate 0.02 = ______lbs/ac ______P2O5

Injected / banded Incorporated deeper than 2 within 5 days of inches application from Incorporated Commercial P OR October through more than 5 days Fertilizer Incorporated February after application Surface applied 1.00 Application within 5 days of OR OR November Method None Applied application from Surface applied Surface applied through February March through March through September September August through October

(0) (1.0) (2.0) (4.0) (8.0) ______Agronomy Technical Note 26 – Appendix 1 PHOSPHORUS INDEX WORKSHEET – WESTERN OREGON June 2013

Organic P Source ______x 1.00 Application Rate 0.02 = ______lbs/ac ______P2O5 Incorporated Injected deeper within 5 days of than 2 inches application from Incorporated OR October through more than 5 days Surface applied Organic P Source November Incorporated February after application Application 1.00 None Applied through February within 5 days of OR OR Method application from Surface applied Surface applied March through March through September September August through October (0) (1.0) (2.0) (4.0) (8.0) ______

Current Planned

Total Rating Transport Factors Subtotal (TFS) Value Site Vulnerability Class TFS + SFS Source Factors Subtotal (SFS) <= 25.0 Low Total Rating Value (TFS + SFS) 25.1 – 50.0 Medium 50.1 - 75.0 High Site Vulnerability Class > 75.0 Zero Out