leaf area index (LAI)can be calculated by collecting leaves of the selected plant and place the leaf on graph and draw the outline of the leaf and after remove the leaf and count the no.of Cm in the graph sheet that the leaves occupied. the leaf area index is expressed in cm and it can be calculated by the formula
leaf area index = total leaf area/total ground area
Leaf area index (LAI) can be directly obtained by harvesting leaves through destructive sampling methods and measuring their area by putting the leaves on a graph filter sheet. The leaf area index can be calculated by the following formula which has shown below.
Leaf area index (LAI)=Total leaf area/total ground surface area