Estimating the curve number for conventional and soil conservation technologies using a rainfall simulator

The aim of the article was to verify curve number (CN) values given in National Engineering Handbook (NEH) methodology, whether they really correspond all wide-row crops. tested crops were maize, hops and potatoes grown using conventional soil conservation technologies. All these are classified as crops, but very different terms cultivation process. basis for calculation our CN field measurements carried out a rainfall simulator within time span from 2014 2020 on corresponding hydrological group B two repetitions: naturally dry an ARC II saturated III curve. results show that calculated are, principle, same NEH methodology. On contrary, certain difference recorded technologies with plant residues surface, case soil. Lower clearly seen no-till strip-till maize catch which confirmed by statistical tests, probably due interception surface roughness.