In the international market of domestic corn consolidation and corn prices high domestic corn production cost of planting, hind has dramatically higher price.

With the cost of food, fuel and fertiliser at historic heights, poor Swazi farmers could be back where they were last year before the planting season: unable to afford the basics to sow their land.

Using increment analysis, the law of changing economic factors, such as cost, price, discount rate, etc, to influence the model optimization could be studied under different planting measures.