Rice plants (50) from each treatment (chosen at random after all
physically damaged or deformed plants were discarded) were measured
for root (root-hypocotyl junction to the root tip) and shoot
length. The biomass yield of rice roots and shoots was determined
on a dry weight basis, using ten replicates of five independent series
(S.E. was equal or lower than 5 %). Dry weight was determined
using dried samples at 100·C for 10 days.