The authors unintentionally missed the citation of the chapter by Hofstee J. W., Speelman L., Scheufler B. “1.4-Fertilizer Distributors” in the “CIGR Handbook of Agricultural Engineering—Volume III, Plant Production Engineering” edited by “The International Commission of Agricultural Engineering, Stout B.A. Texas A&M University U.S.A., Cheze B. Ministry of Agriculture Fisheries and Food France” and published by “American Society of Agricultural Engineers: St. Joseph MI, U.S.A.” in 1999, and thus they wish to apologize to the authors of the uncited work and to make the following corrections:...