Comparisons of Leaf Area Estimation from Linear Measurements of Red Cabbage

Abstract

Accurate and nondestructive methods to determine individual leaf areas of plants can be useful in physiological and agronomic research. The red cabbage (Brassica oleracea var. capitata L. f. Rubra), cvs. Red Dynasty, Red Rookie, and Schwarzkopf 2, was used. Several characteristics were measured to assess cabbage for their suitability for production in northern Iran. Determination of individual leaf area (LA) of red cabbage was based on predictive equations constructed from measurement of leaf length (L) and width (W) and their combination. Regression analysis of LA vs. L and W revealed several equations that could be used for estimating the area of individual red cabbage leaves. A linear equation having W as the independent variable provided the most accurate estimate of LA. The linear equation (LA = −338.88 + 3.2859W ²) exhibited a high degree of accuracy and precision in estimating LA.

Keywords:

• Cultivar
• Correlation
• Linear regression
• Planimeter
• Red Dynasty
• Red Rookie
• Schwarzkopf 2