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The economics of subsoil manuring - the numbers are out

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The first objective of this project was to determine whether subsoil manuring would deliver grain yield increases at a range of sites across the Victorian high rainfall zone (HRZ)... The per ha estimated cost associated with the 20 t/ha subsoil manuring intervention in 2009, at the Penshurst and Derrinallum sites, were higher than we had previously estimated (Table 1)... Using the results in Table 4, we estimated that the average annual increase in wealth (the annual annuity) for this lower rate of subsoil manuring at 10 t/ha, was lower than that from the higher rate of litter incorporation, but was still in excess of $300 / ha / year (Table 5)...
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