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Catalogue: GRDC Updates
When left to grow, summer weeds tie up significant amounts of nitrogen... Grain yield was measured with a plot harvester and grain quality analysed (oil content and moisture)... Soil sampling in December 2010 showed that the differences in PAW measured in March between weedy and non-weedy treatments (Table 1) were still present at the clay site (Table 5), but no longer existed at the sand site due to the lower PAWC filling up during the growing season...
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Catalogue: GRDC Updates
The rotational benefits of canola were usually restricted to just the first subsequent wheat crop, whereas additional wheat yields can occur for 2 years after a legume... Gross margins achieved on-farm for wheat in 2011 may have been lower than shown in Table 2... The gross margin calculations depicted in Figure 5 assumed that canola yielded 50 % of wheat at that site in that year...
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