Consider the nonautonomous square logistic model Δx n=r nx n(1-bx n-k n -cx n-k n 2) n =0,1,2,…,where {r n} is a sequence of nonnegative real numbers; b≥0,c≥0,{k n} is a sequence of nonnegative integers; {n-k n} is nondercreasing;lim n→∞(n-k n)=∞ .We obtain the sufficient conditions that guarantees every positive solution of the equation to tend to the positive equilibrium.Our results improve some recent resul...