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Biochar study raises sandy soils doubts
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A Western Australian study shows that applying biochar made from wheat chaff and eucalyptus wood may have some negative effects on sandy soils.. To assess the impact of biochar on nitrogen leaching in a sandy soil from Meckering, WA, Mr Dempster ran another glasshouse trial and compared the results to those achieved by adding clay - another ameliorant being used by some growers to enhance soil fertility... The results showed yield decreased significantly from 2.1t/ha to 1.7t/ha when biochar was banded into the subsoil...