agri-environmental thresholds using mehlich iii soil phosphorus saturation index for vegetables in histosols.the p concentration in norton creek which drains cultivated histosols in quebec showed median concentration exceeding up to 14 times the environmental guideline of 0.03 mg total p l(-1). the aim of this study was to develop environmental and agronomic thresholds using soil tests to provide a tool for p management in histosols. soil samples were collected from histosols across quebec (82) and in fertilizer trials (66) to calibrate soil test methods against the degree of p saturation (dps(ox)) usi ...201717526876
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