Satellite‐Based Detection of Salinity and Sodicity Impacts on Wheat Production in the Mexicali Valley

摘要: Sodicity and salinity are known constraints on wheat (Triticum aestivum L.) yields in many agricultural areas, especially for irrigated wheat. Objective estimates of the effects these soil properties across broad scales often difficult due to climate, management regimes, diseases. This study used a satellite-derived, 9-yr yield data set combined with 8561 samples estimate sodicity area under production northwestern Mexico's Mexicali Valley. The results showed some reductions but were largely inconclusive. Sodicity, however, appears account an average loss 1.2% each year by harming fields sown wheat, negative seen at least 32% land set. We that additional valley is forgone farmers avoiding sowing sodic soils. Yields appear be negatively affected exchangeable Na percentage (ESP) 6, much lower than commonly accepted threshold 15. this indicate tend planted less have Total impacts order few points, which small relative total gap between maximum on-farm yields.