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+

+

+//example 3.6

+//calculate

+//storage capcity of soil

+//Water depth required to be applied

+clc;

+//Given

+Fc=0.22;                                             //Field Capacity

+wc=0.1;                                             //wilting coefficient

+gammad=15;                                          //dry unit weigth of soil

+gammaw=9.81;                                        //unit wiegth of water

+d=0.7;                                              //root zone depth

+w=0.14;                                            //falled moisture content

+E=0.75;                                           //water application efficiency

+SC=gammad*d*(Fc-wc)*100/gammaw;

+D=gammad*d*(Fc-w)*1000/gammaw;

+FIR=D/E;                                         //Field irrigation requirement

+SC=round(SC*10)/10;

+D=round(D);

+FIR=round(FIR)+1;

+mprintf("Maximum storage capacity of soil=%f cm.",SC);

+mprintf("\nWater depth required to be applied=%f mm",D);

+mprintf("\nField Irrigation Requirement=%f mm",FIR);