soilchemistry (version 0.1.0)

SP: Supply parameter of phosphorus in soil

Description

This function generates the supply parameter (SP) of phosphorus in soil as described by Khasawneh and Copeland (1973).

Usage

SP(W = W, V = V, Ci = Ci, Cf = Cf,...)

Value

SP - Supply parameter (mg^0.5)/(kg L)^0.25

Arguments

W

Mass of soil sample (g)

V

Volume of extractant solution (mL)

Ci

Initial concentration (mg/L) of the added element, e.g., phosphorus

Cf

Final or equilibrium concentration (mg/L) after adsorption of the same element

...

Any other argument that can be passed to base plot

References

Khasawneh, F.E., 1971. Solution ion activity and plant growth. Soil Science Society of America Proceedings 35, 426–436. Khasawneh, F.E., Copeland, J.P., 1973. Cotton root growth and uptake of nutrients: relation of phosphorus uptake to quantity, intensity, and buffering capacity. Soil Science Society of America Proceedings 37, 250–254.

Examples

with(data = df_sordes, SP(W = 2, V = 20, Ci = Initial_conc, Cf = Equilibrium_conc,
col = rgb(red = 1, green = 0, blue = 0, alpha = 0.5), pch = 16, cex = 1))