Errata

Estimativa da área de folhas de cultivares antigas e modernas de soja por método não destrutivo

“…These results indicate the possibility of using a general equation for more than one cultivar, despite the range of leaf shape among cultivars (Figure 1). This is important, because new cultivars are released every year, but as the leaf shape of these cultivars are likely to be similar to the leaf shape of the cultivars used in this study, it will not be necessary to estimate the coefficient of the general equation so often, corroborating the results found by Bakhshandeh et al (2011) and Wiersma and Bailey (1975) for soybean crops and by Aquino et al (2011) for sunflower crop.…”

“…Thus, the need to measure the three leaflets increases by three times the time to measure a leaf, compared to single leaf species, such as maize. Nevertheless, our results indicate that, as others conducted for soybean crop (Bakhshandeh et al, 2011;Wiersma and Bailey, 1975), measuring linear dimensions of only one leaflet (the central one) is enough to achieve a good estimate of the area of the three leaflets.…”

“…Among the non-destructive methods stand out those in which the actual leaf area is estimated from linear measurements of the leaf blade taken directly on leaves of plants (Fagundes et al, 2009;Maldaner et al, 2009;Wiersma and Bailey, 1975). Fontes and Araújo (2007) observed that the use of the length and width of leaves in mathematical models to estimate leaf area is an alternative that combines accuracy and low cost, eliminating the need for sophisticated equipment or time-consuming geometric reconstruction, and no need to collect the leaves.…”

“…In soybean, previous studies have determined models to estimate leaf area from linear dimensions of the leaf (Bakhshandeh et al, 2011;Wiersma and Bailey, 1975). With the introduction of new soybean cultivars in southern Brazil, with indeterminate growth habit, early maturity (Meotti et al, 2012;Vernutti and Vernutti Junior, 2009), maturity groups ranging between 4.5 and 7.5 and a lower leaf area index (Guedes et al, 2010) compared with cultivars of determinate growth habit and medium and long cycles (Tian et al, 2010), there is a need to revisit the nondestructive models available in the literature to estimate leaf area in soybean.…”