Following the increased interest in environment protection and increasing of the soil fertility, as well as the possibility of additional employment of the inhabitants in the rural area, a research into the possibilities to produce animal feeding stuffs was conducted on the experimental field of the College of Agriculture at Križevci. The experiment was set in a randomized block scheme with four repetitions. The size of the plot for each fertilization treatment was 70 sq m. The treatments were the following: I-control (no fertilization), II- mineral fertilizers (200 kg ha-1 N, 150 kg ha-1 P2O5 and 300 kg ha-1 K2O), III – 10 t ha-1 cow manure compost, VI - 10 t ha-1 horse manure compost; V - 10 t ha-1 composted pig slurry, VI – 6 t ha-1 composted poultry manure. The experiment was conducted in 2008 using the maize hybrid Pioneer PR38A24 FAO group 380. The highest yield (14.95 t ha-1) and the highest raw protein content (98.28 g kg-1) were determined for treatment II (mineral fertilizers), while the yield with the treatments III-VI, in which organic fertilizers were used, was 23 to 32% lower, and the protein content was 13-36% lower. Contrary to that, the content of crude fats, ME and NEL per kg of the dry matter were lowest for the treatment II (mineral fertilization) and significantly higher in treatments where variations of organic fertilizers were used. The analysis of the variance showed statistically significant differences between all average analytical parameters at the level of 5 per cent (P<0.05), while the differences at the level of 1 percent (P<0.01) were determined for the yield, crude protein content and NEL. It can be concluded that the ecological production and fertilization with only organic fertilizers, regardless of their origin, produce lower yield per surface area. However, due to the positive effect of the organic matter in the soil, the benefits are much higher.