Work out soil nutrient deficit instantly with clear inputs, formula shown and shareable results.
Converts a soil test deficit in parts per million into kilograms per hectare using the mass of soil in the sampled layer.
Soil nutrient mass
Soil mass (kg/ha) = bulk density x depth (cm) x 100,000; nutrient deficit (kg/ha) = deficit ppm / 1,000,000 x soil mass
The soil test only represents the sampled layer, and mass scales directly with depth.
No. Buffering, fixation and leaching mean more must be applied than the calculated deficit, especially for phosphate.