harv_idx

Harvest index target specified at harvest

This variable will force the ratio of yield to total aboveground biomass to the specified value. For grain harvest, the harvest index in the plant growth database (plants.plt) is used that assumes that only the seed is being harvested (harv_idx is not used in grain harvest). If biomass is cut and removed (e.g., in hay cuttings), harv_idx must be used to specify the amount of biomass cut.