Fall Soil Phosphorus Levels Remain Steady In Manitoba
Manitoba fall 1990 soil tests show average phosphorus at 21 kg per hectare with little year to year change. Only 30 percent of applied phosphorus moves into crops. residual phosphorus is unreliable. Regional variations exist with certain districts showing very low or very high levels and distinct fertilizer recommendations for cereals, canola, and other crops. Individual fields should be soil tested in spring for precise guidance.