Find out how the climate influences one of Brazil's most strategic crops.Soy is more than just an agricultural product - it's a force that drives the national economy. In Paraná, Brazil's second largest soybean producer, the West region stands out with an impressive 21% of the state's production. But how do global climatic events impact this productivity?This book offers an in-depth analysis of the influence of climate variability and water availability on soybean production in western Paraná, revealing how phenomena such as the El Niño-Southern Oscillation (ENOS) and the Pacific Decadal Oscillation (PDO) shape the region's rainfall regime.Based on historical rainfall series (1977-2015) from ten municipalities and microclimate data collected in the municipality of Guaíra (2010-2014), the book presents a rigorous and up-to-date scientific investigation into the correlation between climate and agricultural productivity.