A biomass harvesting system for harvesting agricultural plant growth from agricultural fields comprises a power source for providing mechanical and electric power to the system, a biomass accumulator for producing discrete units of accumulated biomass, a windrower for feeding biomass to the accumulator, a biomass quality analyzer for sensing and transmitting a set of quality characteristics of the biomass, a soil chemical analyzer for sensing and transmitting in real time soil chemical characteristics of the agricultural field soil, an active tracking system for identifying individual ones of the discrete units of accumulated biomass, and a central processing unit including a memory module storing an executable instruction set therein. The central processing unit executes the instruction set and integrates the sensed biomass quality characteristics and the sensed optimal quantity of biomass residue to remain on the field to determine a biomass quality index of the discrete units of accumulated biomass.
