write the procedure to measure area of leaf
Answers
Direct measurements: This involves taking the length and width of a leaf and using weighted regression equations for each species to get the leaf area. ...
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Answer: There are destructive and non-destructive methods of measuring leaf area. Some of the common methods are :
Direct measurements: This involves taking the length and width of a leaf and using weighted regression equations for each species to get the leaf area. The equation used is
= × ×
where l is the length, w is the width of the leaf at its widest point, b is the leaf shape coefficient that varies from species to species, and A is the leaf area.
Millimeter graph paper method: Here a leaf is taken and traced over graph paper, and the grids covered by the leaf are counted to give the area. This method can be both inaccurate and time consuming, and it is also impractical when many measurements are necessary.
Planimeter: This is the simplest tool that is used, but it is destructive. A leaf is plucked and its boundary traced. The planimeter measures the dimensions, and the area is calculated.
Image processing: Images of multiple leaves using a taut bounding area are taken from the top, the side, and obliquely. Average values for each view are calculated using leaf region segmentation, region filling, and area calculation. Imaging can be non-destructive and done in many ways.
Digital scanners: Digital scanners and their accompanying software use a pixel counting method to measure leaf area. This method is fast and non-destructive.
It is best to take measurements of leaves around sunrise or sunset when the leaf is under the least stress from light and heat. The leaves chosen for measurements must be from plant parts exposed to sunlight. Measure two randomly selected leaves from each plant. Take measurements from at least ten plants in a field.
Explanation: hope it helps
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