Lettuce in works under controlled conditions is widely used in experiments with a direct focus on the species itself, or as an indicator species used in allelopathy works. But despite its frequent use, there is no support in the literature for using a single plot size and, therefore, there are works from the use of 5 to 100 seeds per experimental plot. It is understood that the works have been developed using different experimental precisions. The low experimental precision caused by a smaller-than-optimal plot size can lead to a high residual value in the analysis of variance and consequent difficulties in detecting statistical difference between treatments. On the other hand, the use of a high number of seeds per plot can lead to unnecessary expenditure and does not contribute to improving experimental precision. The objective of this work was to determine the optimal plot size in seed germination experiments under controlled conditions. The modified maximum curvature method according to Meier and Lessman was used. After the subsequent analysis, the high variations between different sizes and the factors that can be interfered because of this were observed, and the optimal plot size was defined as six seeds for the biogerminative test of lettuce by petri dishes of 10 cm in diameter.
The modeling of fruit growth is important mainly in physiological and plant growth studies, allowing the monitoring of fruit growth and the follow-up of their development in a non-destructive way. Since no studies were found in the literature to model the growth of 'Isabel' vine fruits, the objective of this work is to adjust a growth curve for the fruits, verifying if the same equation can be applied to two production seasons. year in the north of the state of Espírito Santo. To adjust the growth curves, simple linear, quadratic, cubic, power and exponential models were used, with the weight of the berries as a function of the diameter and length of the berries. The validation of the equations was carried out using the same berries as the estimates of the equations through Pearson's linear correlation, root mean square error, Willmott's agreement index and required sample size to estimate the equation. The power model using the diameter as an independent variable is the equation that best explains the weight of the fruit of the 'Isabel' grape.
The expansion of the papaya crop depends on cultivars with superior characteristics and human acceptance of the product. Thus, the objective was to study the sensory aspect and the main chemical characteristics of the fruit in 23 papaya genotypes cultivated in the north of the state of Espírito Santo and to evaluate if any chemical characteristic can be used to replace the evaluation by the hedonic scale. At 12 months after planting, fruit samples were evaluated for soluble solids content, titratable acidity, SS/TA ratio and a nine-point structured hedonic scale. The samples submitted to the hedonic scale were represented in codes and evaluated according to the experimental design in randomized blocks, totaling 12 treatments with 15 replications in the first experiment and 11 treatments and 21 replications in the second experiment. The data obtained were submitted to analysis of variance and Tukey's test at 5% probability. The means of the four characteristics, in the two experiments, were submitted to Pearson's linear correlation analysis. There was marked variability between the genotypes by the hedonic scale in the two experiments, highlighting the hybrids CR1 x São Mateus and JS12 x SSAM as the most accepted by the consumer.
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