This book is part of my Master Dissertation in Agricultural Engineering, Federal University of Campina Grande (UFCG), whose research was developed under field conditions in the Experimental Unit of EMBRAPA Agroindústria Tropical, Pacajus, Ceará. Thus, the objective was to evaluate the effects of salinity of irrigation water on different genotypes of early dwarf cashew in the germination phase and growth of rootstocks.