Around 10 per cent of the water that has circulated through the tanks is drawn off to fertilise lettuce, bok choy, silverbeet
and herbs grown in hydroponic channels.
Vegetables and legumes (choose a variety): wsarchy vegetables: one medium potato/yam, or half a medium sweet potato, or one medium parsnip; dark green leafy vegetables: 1/2 cup of cabbage, spinach, silverbeet
, broccoli, cauliflower or brussel sprouts; legumes and other vegetables: one cup of lettuce or salad vegetables, or half a cup of broad beans, lentils, peas, green beans, zucchini, mushrooms, tomatoes, capsicum, cucumber, sweet corn, turnips, swedes, sprouts, celery, eggplant, etc
This paper presents results for a field-based silverbeet crop (also known as swiss chard--Beta vulgaris L.
One silverbeet seedling was planted into each pot at the same time as the silverbeet was planted in the field (November 1995).
Analysis of the metal uptake data showed that of the metals added with the biosolids, the concentrations of Cr and Pb in silverbeet leaves were not significantly different from the control treatment (data not shown).
Table 4 gives the Cd and Zn concentrations in silverbeet leaf tissue from plants grown 22 months after biosolids application for the interaction between both p[H.
6 unit increase in soil pH reduced silverbeet Cd concentrations by up to 83% for the 100 dry t/ha biosolids treatment, and by up to 53% for the control treatments.
Increasing the rate of biosolids application to the soil increased the concentration of Cd and Zn in silverbeet leaves.
In captivity, possums consume a wide variety of foods including lucerne, clover, dock, swede, silverbeet
, grain, maize, apples, dried peas, cabbage, carrots and bread, rabbit pellets and meat (Cowan, 1990).