western-queensland-gardening-guide.pdf - South West NRM

Sulphur can also be a very useful way to reduce pH. Wettable sulphur (flowers of
sulphur) is the best form to use because its relative solubility make it more readily
available to the plants. Sulphur is the cheapest form of acidification available at the
moment.
When adding nitrogen fertiliser always use sulphate of ammonia, because it has a
more acidifying effect than urea.
A problem with the use of excess chemical fertilisers in clay soils is the lack of drainage
which will increase salt levels in the soil. The salts from the fertiliser together with
the bore water salts will reduce the ability of the plant to extract water from the soil.
Because of this, where there is a high content of salt in the soil, it sometimes does more
harm than good to add a lot of chemicals. en trying chemical treatment, start with,
a small amount, and be very careful. It may be better to supply nutrients as manure
under these conditions.
Organic matter
Organic matter is a very important component of any soil as it helps hold moisture in
sandy soil, improves the structure and dr ge of clay soil, helps in chemical
reactions and makes available plant nutrients. Leaf mould and animal manures are a
good source of organic matter. These are more suitable for use if they have been
composted first.
Figure 2. Three solid bales of hay arranged in a triangle around a tree provide mulch and a windbreak for
the seedling
!
of fresh leaf mould and animal manure can be dangerous because the
down effect by microscopic bugs can cause nitrogen deficiency.
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