“…(h 2 ) there are C 0 > 0 and q ∈ (p, p * ) such that |h(x, t)| ≤ C 0 (1 + t q−p p ); (h 3 ) there l 0 > 0, s > p θ and p < µ < p * such that H(x, t) ≥ l 0 |t| s p and µH(x, t) ≤ h(x, t)t for all (x, t), where H(x, t) = t 0 h(x, s)ds. Mathematics is successfully applied in numerous technical problems, semisubsistence agriculture systems, biology, farming systems research, agricultural production planning, control theory, etc [4,5,6,21,25,26,35,41,45]. There are many methods to delta with these problems, for example: variational method, Morse theory, mathematical programming and multi-variate analysis etc.…”