Yield of winter wheat depending on precursors, fertilizers and liming

The research was aimed at comparing the characteristics of winter wheat precursors on leached heavy loam chernozem in conditions Republic Mordovia. object study Mironovskaya 808 variety, grown grain-grass-fallow-row (1996-1997) and grain-grass-row (2008-2009) crop rotations, where were pure fallow lucerne grass 3d year use. In control variant (without lime mineral fertilizers), yield after 3.27 t/ha, perennial grasses it 3.72 t/ha. Liming soil introduced 1989-1990 1999-2000 did not make significant changes yield, but combined action with fertilizers rotation against background liming by 1.0 h. a. contributed to a greater increase (0.43 t/ha) than 0.5 (0.28 t/ha). rotation, contrary, a, more grain obtained (0.74 t/ha), (0.51 effect without estimated less ‒ 0.36 0.78 respectively rotations. Taking into account payback 1 kg a.i. an additional income, following doses can be recommended addition phosphorus-potassium: use nitrogen fertilizer top-dressing doses: grain-fallow-grass-row 30 i., 30-60