3.2. lettuce growth rate in sandy soil, coconut coir soil and aquaponic system overall, lettuce growth in sandy soil and coconut coir soil was significantly than that in aquaponics as shown in figure 5. however, there is a drastic increase in mean height increment of lettuce in aquaponics than soils as shown in figure 3.. The great lettuce experiment - aquapanaponics this theory also fits with observed higher growth rates (and greener color) of the soil based lettuce which have a translucent plastic cover. it is possible that this is the reason or a side effect of the slow growth that the aquaponics lettuce have experienced..
