ABSTRACT
LogL.:Logarithmofthelengthofleafn,thelastleaftohavepassedthereference stage
LogR:Logarithmofthereferencestage(length) LogL••,:Logarithmoflengthofleafn+1(thenextleafuptheplantfromleafn) CalculationofthePIofaplantinvolvesfoursteps:
1.Establishmentofareferencestage(R) 2.Countingthenumberofleavesthathavepassedthereferencestage(n) 3.Measurementoftwosuccessiveleaves(L.andL••,),and 4.ActualcalculationofthePIaccordingtotheformulaabove.
