... resulting model was: yjf x j, β()εj+=∂f X, β()∂β Z β()∂f x 1, β()∂β1 … ∂f x 1, β()∂βk ... . . . ...∂f x n, β()∂β1 … ∂f x n, β()∂βk =′′s2b() ... growth and yield models, in: Amaro A., Reed D., Soares P.(Eds.), Modelling Forest Systems, CAB International, Wallingford,Oxfordshire, UK, 2003, pp. 271–293.[23] Judge G.G., Carter R., Griffiths ... criterion for both), G = basal area, = average height, and S = site index, defined as the dominant height (expressed inmeters) that a stand reaches at 20 years, and determined from the site index curves...