Humics are organic matter containing a range of acids known as humic acids. This organic matter has been shown to improve plant growth and health and the health of beneficial soil micro-organisms.
Low soil organic matter is known to be bad for soil condition and plant growth and health. Humics are a group of humic acids that are broken down by soil micro-organisms slowly releasing nutrients that plants can uptake. There is also some evidence that plants maybe able to utilise the larger molecules directly and this may have benefits to the plants.
See more on organic matter, humus, humic-substances and humates.
The macro nutrients that plants need in relatively large quantities are nitrogen (N), sulphur (S), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). But plants also need trace elements in small quantities for healthy growth. Trace elements include; iron (Fe), manganese (Mn), boron (B), copper (Cu), zinc (Zn), molybdenum (Mo) and humic acids.
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