Factors affecting water quality; Principal cations; Principal anions; Other ions; Characteristics affecting water quality; Analysis and classification of irrigation well waters; Factors affecting salt accumulation; Factors affecting sodium accumulation; Relation of conductivity to sodium hazard; Relation to conductivity to dissolved solids; Relation of conductivity to cation content; Definitions and conversion factors; Literature citedBulletin containing the results of analyses of representative waters from the main pump-irrigated areas in New Mexico