Olivet, Yosvel E., Victor Sanchez-Giron, and Jose Luis Hernanz. 2014. “Reduced Tillage for Tobacco (Nicotiana Tabacum L.) Production in East Cuba. Soil Physical Properties and Crop Yield”. Spanish Journal of Agricultural Research 12 (3), 611-22. https://doi.org/10.5424/sjar/2014123-5625.