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Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil by Westerhof, R, Vilela, Lourival, Ayarza, Miguel Angel, Zech, W.

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Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados by Westerhof, R, Buurman, P, Griethuysen, C. van, Ayarza, Miguel Angel, Vilela, Lourival, Zech, W.

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Short-term variation in aggregation and particulate organic matter under crops and pastures by Freibauer, A., Westerhof, R, Ayarza, Miguel Angel, Silva, J.E. da, Zech, W.

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Soil organic carbon, carbohydrates, amino sugars, and potentially mineralizable nitrogen under different land-use systems in oxisols of the Brazilian cerrados by Fuhrmann, S, Neudelft, H, Westerhof, R, Ayarza, Miguel Angel, Silva, J.E. da, Zech, W.

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Carbon fractions as sensitive indicators of quality of soil organic matter by Westerhof, R, Vilela, Lourival, Ayarza, Miguel Angel, Zech, W.

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Labile N and the nitrogen management index of oxisols in the Brazilian cerrados by Westerhof, R, Vilela, Lourival, Ayarza, Miguel Angel, Zech, W.

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Characterization labile and stable nitrogen by Westerhof, R, Vilela, Lourival, Ayarza, Miguel Angel, Zech, W.

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Phosphorus fractions under different land-use systems in oxisols of the Brazilian cerrados by Westerhof, R, Silva, J.E. da, Ayarza, Miguel Angel, Zech, W.

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