5.4 Law of Constant Final Yield

Vince describes the Law of Constant Final Yield which says that the amount of plant biomass (ie leaves, stems, seeds) which can be produced on a piece of land is determined by the least available input, or resource. Examples of limiting resources could be water or nutrients, among others.   Keep in mind the total amount of plant biomass produced on a field is the sum of BOTH the crop and weed plant biomass.