Deep percolation loss from the topsoil layer
cal_DPe_for_DualKc(P, I, Dei_start, fw)
A value for deep percolation loss from the topsoil layer
Precipitation
Irrigation
Depletion in the topsoil layer
Fraction of soil surface wetted by irrigation, 0.01-1
Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. FAO Irrigation and drainage paper No. 56. Rome: Food and Agriculture Organization of the United Nations, 1998.