Pedological Drought Influence on Some Parameters of Soybean Crops from Crisurilor Plain

The paper is based on the research conducted at the Agricultural Research and Development Station Oradea. Decadal determination of soil moisture, calculus of the water reserve and its dynamic graphs allowed the determination of the number of days with pedological drought, respectively of strong pedological drought. Pedological drought as well as strong pedological drought were present every year during the period 2007-2015 with the only difference that the strong pedological drought in fewer days. The optimum irrigation rate was 2800 m3 /ha. The irrigation determined the increase of the daily water consumption values and total water consumption. Finally, due to drought, an average yield loss of 65% was recorded, as well as a decrease in protein content up to 24% and in gross protein up to 31%. An inverse correlation between the number of days with pedological drought and water consumption of the soybean yield, as well as with the protein content of the grains and the gross protein content was established. These correlations emphasized the necessity of irrigation in the soybean crop in Crisurilor Plain.