The present study was conducted in the years 2007- 2008. after 6-year-long experiments in the cultivation of spring barley in a crop rotation system and in monoculture. The other experimental factor was the spring barley protection method. Intensive protection involved comprehensive treatment of barley (in-crop harrowing. https://safeersappliancers.shop/product-category/bosch-serie-4-gsn29vw3vg-no-frost-161x60cm-200l-freestanding-upright-freezers/