A Simple, Cost-Effective Method for Leaf Area Estimation

Table 2

Regression equations and coefficients of determination (𝑅²) between leaf area measured by leaf area meter (𝑦, cm²) and that estimated by millimeter graph paper method (𝑥, cm²) for five plant species, (𝑛=10 for each species). Observations were made on attached leaves.

S. no.	Species	Month of sampling	Regression equation	𝑅^2
1	Crescentia cujete	August	𝑌=0.953𝑋−1.247	0.998
2	Hibiscus rosa-sinensis	October	𝑌=0.984𝑋−2.436	0.996
3	Morus alba	September	𝑌=0.979𝑋−1.580	0.998
4	Populus alba	August	𝑌=0.967𝑋−1.537	0.998
5	Psidium guajava	September	𝑌=1.030𝑋−2.483	0.997

All 𝑅² values are significant at 𝑃<0.0001.