At the end of 8 days, the ability of the plants to cause root zone acidification and to reduce ferric iron to ferrous iron (ferric reductase activity) was determined;
(the ability of the plants to cause root zone acidification and to reduce ferric iron to ferrous iron (ferric reductase activity); was determined; T:At the end of 8 days)
the ability of the plants to cause root zone acidification and to reduce ferric iron to ferrous iron (ferric reductase activity)
was determined
T:At the end of 8 days