Probabilidade de rendimento, de quatro cultivares de soja cultivados na época antecipada e tardia.

Abstract

This study was carried out at the region of Palotina, state of Paraná (latitude of 24º17’S, longitude of 53º50’30” and altitude of 333 meters), where the growth and development of the soy crop simulation model was used (Glycine Max (L) Merrill), CROPGRO-SOYBEAN, which was calibrated to the soy crops CD 202, CD 204, CD 206 and CD 210, cultivated in the region of Palotina, state of Paraná. After the calibration, the simulation of the soy productivity for two different sowing dates and in twenty-five harvest period, from 1974 to 1999, was carried out. From the two dates of simulated sowing, the one that presented the highest productivities was October 1st, but in this date we also found the lowest productivity. The analysis of the probability of incomes demonstrates to be a great tool in the aid the socket of decision as for the time of sowing of the culture of the soybean.