Table 13: Integrating field sensitive/physical and management (nutrient, tillage and pest) factors into a single WQIag Ranking WQI WQI WQI Description Ranking Ranking Ranking Factors (WR) (WR) (WR) Field Sensitivity Factors (WQI-fs) (For field slope range between 2-5%) Hydrologic Soil B- moderately low runoff 8 0.25 2.0 potential K-Factor 0.30 (0.21- 0.32 moderate 8 0.25 2.0 erodibility) OM Content 5% (4-6% range) 7 0.25 1.75 Rainfall/Vegetation Annual mean average for the 5 0.25 1.25 example case WQI-fs (Aggregated value of slope, K-factor, OM Content, and Rainfall /vegetation 1.00 7.0 rankings) Nutrient Management (WQI-nu) LGU/NBP Application Rate 5 0.30 1.5 Recommendation Single Application of N-Source Application Timing Synthetic Fertilizer during 6 0.30 1.8 pre-growing season Single Application synthetic P-Source and Application Timing Fertilizer during pre-growing 2 0.15 0.3 season Non-hydrous Fertilizer into Application method & Soil Condition 8 0.25 2.0 moist soils WQI-nu (Aggregated of Application rate, N-Source Application & timing, 1.0 5.6 Application & Timing, and Application methods & Soil Condition) Tillage Management (WQI-tm) Conventional Till with STIR Value between 60-100 5.0 Pest Management (WQI-pm) Follow IPM with suppression using Low Risk Chemicals 7.5 WQI WQI -nm -pm WQI Ranking (WR) 7.0 5.6 5.0 7.5 Weight Factor (WF) 0.25 0.25 0.25 0.25 Weighted Value (WR*WF) 1.75 1.40 1.25 1.88 WQIag (Weighted mean value of WQI-fs, WQI-nm, WQI-tm, & WQI-pm) 6.28 Irrigation Method and Adjustment Trickle / Drip Irrigation (-2.5%) 6.10 Additional Conservation Practice(s) and Grass Waterway (+35%) 7.46 adjustment
Table 13: Integrating field sensitive/physical and management (nutrient, tillage and pest) factors into a single WQIag Factors Description Ranking WQI Ranking (WR) WQI Ranking (WR) WQI Ranking (WR) Field Sensitivity Factors (WQI-fs) (For field slope range between 2-5%) Hydrologic Soil B- moderately low runoff potential 8 0.25 2.0 K-Factor 0.30 (0.21- 0.32 moderate erodibility) 8 0.25 2.0 OM Content 5% (4-6% range) 7 0.25 1.75 Rainfall/Vegetation Annual mean average for the example case 5 0.25 1.25 WQI-fs (Aggregated value of slope, K-factor, OM Content, and Rainfall /vegetation rankings) 1.00 7.0 Nutrient Management (WQI-nu) Application Rate LGU/NBP Recommendation 5 0.30 1.5 N-Source Application Timing Single Application of Synthetic Fertilizer during pre-growing season 6 0.30 1.8 P-Source and Application Timing Single Application synthetic Fertilizer during pre-growing season 2 0.15 0.3 Application method & Soil Condition Non-hydrous Fertilizer into moist soils 8 0.25 2.0 WQI-nu (Aggregated of Application rate, N-Source Application & timing, Application & Timing, and Application methods & Soil Condition) 1.0 5.6 Tillage Management (WQI-tm) Conventional Till with STIR Value between 60-100 5.0 Pest Management (WQI-pm) Follow IPM with suppression using Low Risk Chemicals 7.5 WQI -nm WQI -pm WQI Ranking (WR) 7.0 5.6 5.0 7.5 Weight Factor (WF) 0.25 0.25 0.25 0.25 Weighted Value (WR*WF) 1.75 1.40 1.25 1.88 WQIag (Weighted mean value of WQI-fs, WQI-nm, WQI-tm, & WQI-pm) 6.28 Irrigation Method and Adjustment Trickle / Drip Irrigation (-2.5%) 6.10 Additional Conservation Practice(s) and adjustment Grass Waterway (+35%) 7.46