Meat and Bone Meal and the Energy Balance of Winter Oilseed Rape—A Case Study in North-Eastern Poland

A two-year field experiment was conducted in Poland to determine energy efficiency (EE) the production of winter oilseed rape (WOR) different fertilization: (i) zero-fertilization; (ii) 158 kg N ha−1, 45 P ha−1 and 145 K as mineral fertilizer (NPK); (iii) 1.0 Mg meat bone meal (MBM), 79 fertilizer; (iv) 1.5 MBM, 40 (v) 2.0 MBM fertilizer. The replacement NPK with decreased inputs WOR by 20−55%. had a greater (16–21%) effect on seed yield formation than MBM. output seeds (14–21%) total biomass (12–20). (6–13%) gain from production. application improved EE ratio (10–81%) (11–85%) relative NPK. increased rise doses.