Estimations of Soil-Plant-Climate Relation in the Conditions of the Transylvania Fields.

Determining the relation of plant - soil - climate and determining of each parameters, means to establish and develop a rational exploitation and sustainable agriculture system, having in the end of the vegetative periods a positive ratio between inputs and outputs, without high losses. The cultivable land and production registered a significant extension in the last years, but compared with the European Union benefits from agriculture exploitations, the Romanian agriculture systems, need to be improved and develop more rational. Soil moisture is important for forecasting both temperature and precipitation. As the temperature rises the evaporation rate of soil moisture increases. The increased soil moisture evaporation helps cool the ground. The researches were performed on a cultivable land from Plaiuri Field, Cluj-Napoca County in a bi-factorial experiment. Three graduals at the A factor - irrigation regime and five graduals for B factor - variety were followed. The soil offers the most stable variables, plant needs could be estimated and stabilized, and climate offers the most important elements for a normal evolution of the plant, typically for the variety. [ABSTRACT FROM AUTHOR]