The current research is based on the production results obtained on wheat crops (Dumbrava Variety), cultivated following corn and following soy, in long term experiments conducted on an argyle chernozem as a representative soil for the north-western region of Romania, especially Cluj County. The production data are obtained from these experiments, which hold objectives that target both the effect of differentiated fertilizations on wheat yields and the quantity of the productions obtained.The goal of this research is to exhibit the differentiated fertilization systems involved in obtaining high productions for wheat (grown following soy, respectively following corn) in the reference area. In this study it was tracked the effect of the nitrogen-phosphorous interaction and the effect of the thermal regime during three experimental years (2011, 2012, 2013) in achieving the wheat productions.
PORUTIU et al. (Sat,) studied this question.