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dc:title "HTML Summary of #10012 \n\nSequestering soil carbon in the low input farming systems of the semi-arid tropics – does litter quality matter?\n\n";
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bibo:abstract "Maintaining soil organic matter (SOM) in low input smallholder rice cropping systems worldwide is of\r\nparamount importance to maintaining livelihoods and food security. A long term rainfed lowland rice\r\nexperiment tested the hypothesis that applying small (1.5 t/ha dry matter) annual additions of slowly\r\ndecomposable plant materials which were grown offsite and applied prior to land preparation, could result in\r\nincreased soil organic carbon, crop yield and improve the recovery of nutrients compared with plant materials\r\nof higher quality or straw retention alone. Annual leaf litter applications over 9 seasons resulted in significant\r\nincreases in SOC of 39% (from 3.5 to 4.9 mg/g) in the leaf litter treatments compared to only 13 % in the noleaf\r\nlitter control. In terms of rice grain production and nutrient use efficiency, leaf litter quality was an\r\nimportant driver. Apparent nutrient recovery of nitrogen and sulfur reflected the decomposition rate of the\r\nadded residues. Sustainable farming systems will require that crop yields are stable through the maintenance\r\nof soil fertility and the balanced use of nutrients in the system. The results of this study are therefore highly\r\nsignificant and provide evidence that low rate, long term residue management can have profound effects."^^xsd:string;
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skos:prefLabel "Semi-Arid Tropics"@en .
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skos:prefLabel "Farming Systems"@en .
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skos:prefLabel "Soil Science"@en .
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skos:prefLabel "Drylands Agriculture"@en .
dct:title "Global Symposium on Soil Organic Carbon"^^xsd:string;
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