Panel - PRS® Technology: A “time-tested” Improvement to the Traditional Soil Testing Program •

Nitrate supply rate ( µg cm-2) NO3 Pea NO3 Wheat Length of No-till Indian Head Nitrate Supply in Long-Term and Short-Term No-Till with 0 lbs P2O5 Fertilizer per Acre 15.91 9.3 21.96 14.05 STLT 0P PRS NH4 Short-Term Short-Term 0.005 0.005 0.009 0.009 Long-Term Long-Term 0.036 0.036 0 0 Pea Stubble LSD(0.05) = 0.05 Wheat Stubble LSD(0.05) = 0.01 Error bars = ± Std. [...] Ammonium supply rate ( µg cm-2) NH4 Pea NH4 Wheat Length of No-till Indian Head Ammonium Supply in Long-Term and Short-Term No-Till with 0 lbs P2O5 Fertilizer per Acre 0.102 0.0975 0.165 0.12 STLT 0P PRS P Short-Term Short-Term 0.0129 0.0129 0.0262 0.0262 Long-Term Long-Term 0.0141 0.0141 0.0298 0.0298 Pea Stubble LSD(0.05) = 0.01 Wheat Stubble LSD(0.05) = 0.08 Error bars = ± Std. [...] Phosphorus supply rate ( µg cm-2) P Pea P Wheat Length of No-Till Indian Head Phosphorus Supply in Long-Term and Short-Term No-Till with 0 lbs P2O5 Fertilizer per Acre 0.025 0.0625 0.05 0.0625 STLT 20P PRS NO3 Short-Term Short-Term 2.61 2.61 1.54 1.54 Long-Term Long-Term 2.08 2.08 1.61 1.61 Pea Stubble LSD(0.05) = 7.2 Wheat Stubble LSD(0.05) = 2.1 Error bars = ± Std. [...] Nitrate supply rate ( µg cm-2) NO3 Pea NO3 Wheat Length of No-till Indian Head Nitrate Supply Rate in Long-Term and Short-Term No-Till with 20 lbs P2O5 Fertilizer per Acre 17.3 10.34 21.85 13.65 STLT 20P PRS NH4 Short-Term Short-Term 0.015 0.015 0.005 0.005 Long-Term Long-Term 0.219 0.219 0.047 0.047 Ammonium supply rate ( µg cm-2) Pea Stubble LSD(0.05) = 0.36 Wheat Stubble LSD(0.05) = 0.08 Error. [...] P Pea P Wheat Length of No-till Indian Head Phosphorus Supply in Long-Term and Short-Term No-Till with 20 lbs P2O5 Fertilizer per Acre 0.09 0.0375 0.05 0.1225 STLT 40P PRS NO3 Short-Term Short-Term 3.96 3.96 1.72 1.72 Long-Term Long-Term 2.61 2.61 2.65 2.65 Nitrate supply rate ( µg cm-2) Pea Stubble LSD(0.05) = 3.6 Wheat Stubble LSD(0.05) = 2.7 Error bars = ± Std.