GROWTH POTENTIAL OF HYBRID BLACK POPLAR(POPULUS x CANADENSIS Moench) IN ROMANIA'S EAST PLAIN

The realized investigations intended to evaluate the stand volume and current annual increment for the hybrid black poplar. The research was realized on the surface of 375 parcels, between 2010 and 2015. The following elements were evaluated: consistency, density, volume stand and current annual increment. Statistical analysis methods were used together with many numeric analysis methods. The approximation methods based on using neural networks are not very efficient. Furthermore, the interpolation method through analytical polynomial function with mixed terms used successfully in the systems characterized by significant changes in regard with certain state parameters, was used successfully in this case.