Corn biomass was collected by measuring a 3m row in two different random locations, counting the number of plants in 3m, and subsampling a certain number of plants from the 3m row.  

Soybean biomass was collected by measuring a 1m row in two different random locations, counting the number of plants in 1m, and subsampling a certain number of plants from the 1m row.

Rows in the cropped systems are 30 inches wide.  


Prairie biomass was collected by placing a 0.61 m2 sampling ring at 5 random locations and hand cutting the prairie grass inside the ring.  

Prairie sampling ring diameter
88 cm =	0.61 m2