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Project Summary
The use of fertilisers now constitutes one
of the largest variable inputs into modern grain production systems, especially
in southern Australia. Nutrient management involves the interplay of input,
loss and transfer processes, and we propose that by understanding the
dynamics of nutrients in modern cropping systems more efficient and
effective strategies can be developed.
We will quantify the size and flux rates of
selected nutrients across a broad range of management systems, using long
term experiments in association with simulation models. Detailed studies on
the placement of nutrients relative to root growth will be done to develop
and test field strategies to match N and P supply with plant demand.
This will improve our knowledge of spatial
and temporal nutrient balance in modern cropping systems and develop
benchmarks for efficient nutrient use.
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