Weight of Developing sapota fruit is shown to be double logistic form with

Y=               K₁                                    K₂ 

            ________           +         _________  

             1+3^a₁^+b₁^t                       1+3^a₂^+b21

the parameters k₁ k₂, a₁ b₁ a₂ and b₂ of the model being estimated by literative technique.