Growing food

Topic: Growing food
Subtopic: Caring for soil
Age: 7 - 12
Holistic Planning: Hand
Details: Do a scientific experiment comparing different ways of making compost: e.g. under water vs air, with all 'greens' together vs with 'greens' and 'browns' in layers, in sun vs shade, with added worms vs without, adding effective micro-organisms, small vs large container, hot composting, wormery etc. Survey experiment weekly for 2+ months. Compare smell, colour, flies, decomposition rate etc.