Germination Synchronization Index, from Ranal, M. A., & Santana, D. G. D. (2006)
Source:R/decimal_germinaR.R
f_syn.Rd= 1 when germination of all the seeds occurs at the same time and = 0 when at least two seeds can germinate one each time. Thus, the value of synchrony assessments is the grade of overlap between seed germination.