// This processing detemines the N P K values in lb per acre for the fertilizer select and appricatio rate/density etc.
public FertilizerNutrients GetFertilizerNutrients()
{
FertilizerNutrients fn = new FertilizerNutrients();
// get the fertilizer N P K % values from fertlizer look up
// for dry fertilizers
// N (lb/ac) = Application rate converted to lb/ac * N %
// P and K same as above
// for wet fertilizers
// N (lb/ac) = Application rate converted to lb/ac * N% * Density converted to lb / imp gallons
//
decimal applicationRateConversion = 0;
decimal densityInSelectedUnit = 0;
decimal densityUnitConversion = 0;
Fertilizer _fertilizer = _sd.GetFertilizer(FertilizerId.ToString());
if ((CustomFertilizer && FertilizerType == "dry") || (!CustomFertilizer && _fertilizer.dry_liquid == "dry"))
{
densityUnitConversion = 1;
switch (ApplicationRateUnits)
{
case 1: // application rate in lb/ac no conversion required
applicationRateConversion = 1;
break;
case 2: // application rate in kg/ha, convert to lb/ac
ConversionFactor _cf = _sd.GetConversionFactor();
applicationRateConversion = _cf.kgperha_lbperac_conversion;
break;
case 7: // application rate in lb/100 ft squared, convert to lb/ac
ConversionFactor _cf1 = _sd.GetConversionFactor();
applicationRateConversion = _cf1.lbper1000ftsquared_lbperac_conversion;
break;
}
}
else //use liquid fertilizer
{
FertilizerUnit _fU = _sd.GetFertilizerUnit(ApplicationRateUnits);
applicationRateConversion = _fU.conv_to_impgalperac;
if (CustomFertilizer)
{
densityInSelectedUnit = Density;
}
else
{
LiquidFertilizerDensity _lfd = _sd.GetLiquidFertilizerDensity(FertilizerId, DensityUnits);
densityInSelectedUnit = _lfd.value;
}
DensityUnit _du = _sd.GetDensityUnit(DensityUnits);
densityUnitConversion = _du.convfactor * densityInSelectedUnit;
}
fn.fertilizer_N = ApplicationRate * decimal.Divide(userN, 100) * applicationRateConversion * densityUnitConversion;
fn.fertilizer_P2O5 = ApplicationRate * decimal.Divide(userP2o5, 100) * applicationRateConversion * densityUnitConversion;
fn.fertilizer_K2O = ApplicationRate * decimal.Divide(userK2o, 100) * applicationRateConversion * densityUnitConversion;
return(fn);
}