Výsledky vyhledávání - "Roelof Westerhof"

Aggregation studied by laser diffraction in relation to plowing and liming in the Cerrado region in Brazil

Autor: C van Griethuysen, Miguel A. Ayarza, P Buurman, Lourival Vilela, Wolfgang Zech, Roelof Westerhof

Publikováno v: Geoderma, 90, 277-290
Geoderma 90 (1999)

In the Cerrado savanna region in Brazil, the effects of different land use on axisol aggregation were studied using laser diffraction grain size analyses. The topsoil of plowed systems had significantly lower amount of macroaggregates (2000-194 μm)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7c5122104edca0ed183fad5c2ce2236
https://doi.org/10.1016/s0016-7061(98)00133-5

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Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil

Autor: Wolfgang Zech, Lourival Vilela, Roelof Westerhof, Miguel Angel Ayarza

Publikováno v: Biology and Fertility of Soils. 27:353-357

The effect of land use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the meth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da634c31d8e28cb4c0db14f23bb2815c
https://doi.org/10.1007/s003740050443

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