Historic development of winter-wheat yields in five irrigation districts in the Sonora desert, Mexico

摘要: SUMMARY The history of development winter wheat cultivation in five irrigation districts northwestern Mexico is analyzed. accelerated growth yields can be described by adjustment the parameters logistic model. A common variation analyzed series exists, which determined positive tendency series, a product Green Revolution. This event explains 80% observed variation. Nevertheless, social and economic conditions, regional geography, suggest differential development. Four agricultural developments are defined: Borders (Mexicali-San Luis-Rio Colorado), Indigenous Agriculture (Ejidales Colonias Yaquis), Private (Valle del Yaqui Mayo), Pioneers de Santo Domingo Baja California Sur). each group compared with national efficiency curve. purpose to compare main irrigated valleys during Revolution following stabilization, based on historic events. possibility increasing productivity as function maximum reached at levels discussed.