In field experiment with onion and carrot cultivation on lessive soil derived from silly medium loam the effect of soil mulching and no-tillage cultivation on emergence, growth and yield was investigated. Weather conditions had a significant influence on the onion and carrot emergence. Application of cover crop mulches inconsiderable limited emergence of onion. Emergence and growth of both cultivated plants were higher under no-tillage cultivation. Soil mulching with Sinapis alba L., Phacelia tanacetifolia B. and Vicia saliva L. created favourable conditions for plants growing. Significant influence of weather conditions on total and marketable yield of onion and carrot roots was observed. No-tillage cultivation with Vicia saliva L. and Phacelia tanacetifolia B. mulches had a profitable effect on the yield of onion. The highest total and marketable yield of carrot roots was harvested from the plots with conventional soil cultivation. Cover crop mulches inconsiderable limited the yield of carrot roots. Among investigated cover crop mulches Avena saliva L. and Phacelia tanacetifolia B. had the greatest influence on the yield of carrot roots.