Rice husk ash as corrective of soil acidity Report as inadecuate




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Ledemar Carlos Vahl ; Luís Carlos Timm ; Donald Luiz Paul ; Aline Hernandez Kath ;Revista Brasileira de Ciência do Solo 2014, 38 3

Author: Gláucia Oliveira Islabão

Source: http://www.redalyc.org/


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Revista Brasileira de Ciência do Solo ISSN: 0100-0683 revista@sbcs.org.br Sociedade Brasileira de Ciência do Solo Brasil Oliveira Islabão, Gláucia; Vahl, Ledemar Carlos; Timm, Luís Carlos; Luiz Paul, Donald; Hernandez Kath, Aline RICE HUSK ASH AS CORRECTIVE OF SOIL ACIDITY Revista Brasileira de Ciência do Solo, vol.
38, núm.
3, 2014, pp.
934-941 Sociedade Brasileira de Ciência do Solo Viçosa, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=180231349019 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative 934 Gláucia Oliveira Islabão et al. RICE HUSK ASH AS CORRECTIVE OF SOIL ACIDITY(1) Gláucia Oliveira Islabão(2), Ledemar Carlos Vahl (3), Luís Carlos Timm(4), Donald Luiz Paul(5) & Aline Hernandez Kath(6) SUMMARY Rice husk ash (RHA) is a by-product from the burning of rice husk that can have favorable effects on the soil in terms of acidity correction.
The objectives of this study were to determine the effective calcium carbonate equivalent (ECC) of RHA under field conditions, and establish technical criteria as a basis for estimating the overall ECC of RHA.
The 12 treatments of the experiment consisted of 10 RHA dosages (0, 10, 20, 30, 40, 60, 80, 100, 120, and 140 Mg ha-1) and two references, one of which was an absolute control (AC) and the other a plot limed and fertilized according to official recommendations (recommended fertilization - RF).
The soil was sampled twice (15 and 210 days after incorporating RHA), in the layers 0.00-0.10 and 0.10-0.20 m, to determine the pH(H2O) and base saturation (V%).
The ECC and neutralizing value (NV) of RHA were also determined.
The results showed that RHA neutralizes soil acidity, in a faster reaction than conventional limestone, despite a low ECC (around 3 %). Ind...





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