a flow of goods or services from a forest that remains approximately constant in successive periods —note the sequential flow pattern specifying the percent increase or decrease in successive periods is H_j+1 ≤ (1+β) H_j where H = level of yield, j = period (year), and β = percentage increase in yield from the subsequent period (ranging between 0 and 1) —see nondeclining yield This definition last updated 10/26/2008