This study presents a way of working to improve corn cultivation technology (KWS Kashmir hybrid) under differentiated fertilization conditions. The study was conducted within the ATU Cenai, Timis County, during 2023 - 2024. Two fertilized variants were created, with complexes 20/20/20+SO3+Zn (235 kg ha-1, fertilized – F /0 kg ha-1 unfertilized – UF). On the two created variants, a common fertilization fund with urea (250 kg ha-1) and foliar products (Albit, 40 ml ha-1; Solar verde, 3 L ha-1) was ensured. For the differentiated evaluation, the following parameters and indices were determined: agronomic parameters (plant height – PH, number of leaves per plant – LN), physiological indices (chlorophyll content – Chl, carotenoid content – Car), productivity elements (number of ears per plant – EP, ear diameter – ED, ear length – EL, ear weight – EW, grain weight – GW, rachis weight – RW). Hectoliter weight (HW, kg hl-1) was determined for grain samples. In both fertilization variants, high variability was recorded for the EP parameter. In the fertilized variant, higher values were recorded with significant differences compared to the unfertilized one for PH (p<0.05), for Chl (p<0.01) and for Car (p<0.001). In the case of productivity elements, in the unfertilized variant, negative differences were recorded compared to the fertilized variant, with statistical certainty, for EW and GW (p<0.05), and in the case of ED (p<0.001). Quadratic polynomial models described the variation of the EW parameter in relation to the ED and EL elements, with statistical certainty (R2 = 0.883 in the fertilized variant; R2 = 0.965 in the unfertilized variant). Convergent action of the ED and EL elements was recorded in the formation of EW in the fertilized variant, and divergent action in the case of the unfertilized variant.
MARICHICI et al. (Wed,) studied this question.