Soil Science and Plant Nutrition in Ecuador

The author was able to dedicate himself to the investigation of the physical and chemical properties of soils in representative sites in the region of Costa, Sierra and Oriente, Ecuador since 2014.As a first step, the author investigated the soil in the Sierra region, he was able to know what the Olsen-Modified method was performed to determine not only N, P, micros but also the three bases (K, Ca and Mg) as the conventional method and the determination of the Cation Exchange Capacity (CEC) was not performed. Taking into account the previous experience in Colombia, the author was concerned about soil salinity in the Sierra region under dry conditions. As a second step, the author investigated the investigation of the chemical property of soils in the Costa, Oriente and Sierra region, and introduced the Colombian method with the evaluation of CEC in addition to the physical investigation.By the introduction of the Colombian method, the author was able to manifest the soil salinity in the Costa and Sierra region. In the Costa region, agricultural production was carried out in the rainy season, depending on rain and in the dry season with irrigation. This is the first edition for the country.