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Impact of alternative relative cane payment systems and harvest scheduling on growers revenues

Le Gal P.Y., Papaïconomou H., Lyne P.W.L., Meyer E.. 2005. Proceedings of the Annual Congress of the South African Sugar Technologists' Association, 79 : p. 416-427. Annual Congress of the South African Sugar Technologists' Association (SASTA). 79, 2005-07-19/2005-07-22, Durban (Afrique du Sud).

The Centre de coopération internationale en recherche agronomique pour le dévelopment, the South African Sugarcane Research Institute and the Sezela mill have since 2002 been conducting a collaborative research project into the potential benefits that could be expected from re-arranging cane supply scheduling based on the variation of quality patterns within the Sezela mill supply area. The supply area was split into three quality-based sub-areas determined by climatic conditions, and various harvest windows were allocated to each sub-area according to its specific recoverable value (RV) curve. Simulations of the mill's cane supply and the associated RV % cane showed gains ranging from 0.5 to 2.5%. A study was conducted in 2004 with the objective of investigating the relevancy of the current and alternative relative payment systems when distinctive supply sub-areas are defined within the mill supply area. Two alternatives to the current relative payment formula were designed and their impacts on growers' revenues were simulated. Alternative 1 switches the weekly RV average of the overall supply area with the weekly RV average of each sub-area. Alternative 2 considers each sub-area as a completely separate supply area. Simulations have shown that re-organising mill supply by separating subarea deliveries impacts differently on the growers' revenue, depending on the selected payment system. The current system and Alternative 1 both lead to RV transfer from Inland to Coastal, while Alternative 2 keeps RV revenue close to actual RV. (Résumé d'auteur)

Mots-clés : simulation; revenu; fonction d'offre; industrie du sucre; récolte; canne à sucre; afrique du sud

Thématique : Economie de la production

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