The chemical minerals which plants require in small amounts are called trace elements or minerals, or micro-nutrients.
In all, there are 96 elements known to be essential for plants to grow and reproduce.
The major trace elements are carbon, hydrogen, oxygen, sulphur, calcium, magnesium, boron, manganese, iron, copper, molybdenum, zinc and chlorine.
These can be supplied by using ground mineral rock, also by foliar fertilising with seaweed/fish extracts.
To test soil take several samples from different areas in the garden, mix them together in a plastic bag, and then test.
To correct low pH (acid) soil, apply ground agricultural limestone or dolomite annually at a rate of 2 kilos per 30 square metres of garden area.
Increasing the organic matter in the soil will also help to correct acid soil.
Testing samples of soil
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