The highest tiller in each pot was chosen to measure for plant
height. The total tillers in each pot were measured for tiller
number. Three fully expanded mature leaves of each plant in
eachpot (4e6 leavescountedfromthe topof stem)were selected
and measured for leaf area with a portable leaf area metre (LI-
3000A, South San Francisco, CA, America). The longest root of
each plant was chosen to measure for root length.