Published in Agron J 98:94-99 (2006)
DOI: 10.2134/agronj2005.0111
© 2006 American Society of Agronomy
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Effect of Genotype, Nitrogen, Plant Density, and Row Spacing on the Area-per-Leaf Profile in Maize
Oscar R. Valentinuza and
Matthijs Tollenaarb,*
a Instituto Nacional de Tecnología Agropecuaria, EEA Paraná Ruta 11 km 12.5 (3101) Oro Verde, Entre Ríos, Argentina, and Universidad Nacional de Entre Ríos, Facultad de Ciencias Agropecuarias, CC 24 (3100) Paraná, Entre Ríos, Argentina
b Dep. of Plant Agriculture, Univ. of Guelph, Guelph, ON, Canada N1G 2W1

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Fig. 1. Observed values of individual leaf area compared with those estimated from the bell-shaped function. For each individual leaf, its area (LAn) was estimated as LAn = LAo x exp[0.04019 x (xn 12)2 + 0.00015 x (xn 12)]3, where LAo was the area of the largest leaf and xn was the leaf position of the nth leaf.
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Fig. 2. Normalized leaf area profile for (A) two maize hybrids, and (B) for maize plants grown at either two plant densities or (C) two levels of N application.
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Fig. 3. Relationship between (A) the b coefficient and mean daily incident solar radiation and (B) between the xo coefficient and mean temperature during a period of 30 d after planting. Data included 4 yr in Woodstock (squares) and 1 yr in Elora (diamonds).
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Copyright © 2006 by the American Society of Agronomy.