Efficiency of using organic and mineral fertilizers in fodder crop rotation on northern soddy podzols

This article presents a stationary field test on light clay loam conducted to study the influence of organic and mineral fertilizers and their combinations on the fertility and productivity of this soil. The efficiency of using organic (PMC of 80 t/ha) and mineral (NPK) fertilizers in combination is shown for a sixfield crop rotation. The average crop yield of potato, annual grass, and perennial grass for two crop rotation phases was 3.9, 4.4, and 6.6 t/ha of dry matter, respectively. The fertilizers, especially organic-mineral ones, contributed to the increase in starch content in potato to 13–13.6% (11.6% in the reference sample) as well as the increase in crude protein content in annual and perennial grass to 14.4 and 15.2%, respectively (10.3 and 11.6% in the control sample). It has been noted that organic and organic-mineral fertilizer systems produce a positive effect on the organic matter content in soil.