The paper is based on the research carried out in the second cycle of the experiment placed in Oradea in 1999. The use of lupine mixed with oat determined the improvement of the macrostructural stability compared to lupine pure crop. The use of the mixture also determined the improvement of other physical parameters, slightly improvements of the chemical parameters of fertility of the soil, the improvement of the enzymatic activity; as a result, the soil quality enzymatic index improved, a value of 455 compared to one of 441.49. The green manure pure crop ensures a 100% rate of success; the start second crop takes risks when made after 10 th of July. In average, during 2004 to 2006, the lupine + oat variant assured statistically yield gain in the maize crop, compared to the lupine pure crop variant; these yield gains were registered both in the wheat-maize crop rotation and  the crop rotation which included clover; the yield gains were also registered in the backgrounds studied (N 0 P 0 K 0 ; N 90 P 90 K 60 ). The maize’ water use efficiency had higher values in the variant fertilized with lupine + oat in both crop rotations and both background. The results obtained reveal that the use of lupine mixed with oat improves the soil’s characteristics. They also lead to maize yield gains statistically assured, compared to lupine pure crop and the improvement of the maize’ water use efficiency.

green manure; lupine; oat; mixture; technology

Presentation: oral