[Some outlined principles in Romanian agronomy concerning soil and plants fertilization]
1997
Gavriluta, I. | Alexandrescu, Ariadna | Borlan, Z. (Institutul de Cercetari pentru Pedologie si Agrochimie, Bucuresti (Romania)) | Budoi, Gh. (Universitatea de Stiinte Agricole si Medicina Veterinara, Bucuresti (Romania))
The paper contains some principles used in soil and plants fertilization in Romania. The principles are established on scientifical base of differentiated application of organic and mineral fertilization in correlation with pedoclimatic conditions. These principles refer firstly to the natural sources of nutrients. For actual productivity levels of crops from Romania the soil provides 60 percent of nutrients total efficient for plants and the natural fertilizers provide 7.5 percent from nutrients total efficient for plants. By biological fixation (under leguminous plants - annual and perennial) are supplied 2.5 percent of the nitrogen total efficient for plants. Researchers conclude that the yields of the last years are achieved in proportion of 70 percent based on natural sources of nutrients and only 30 percent of yields are achieved by chemical fertilization.
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