Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Miguel Angel Ayarza"'
Autor:
Miguel Angel Ayarza, Cristiane de Conti Medina, Maria de Fátima Guimarães, Amarildo Pasini, Lourival Vilela, Gustavo Adolfo de Freitas Fregonezi, Michel Brossard
Publikováno v:
Comptes Rendus Geoscience. 344:41-49
Ferralsols are characterized by poorly-defined horizons, weak macrostructure and strong development of a fine granular structure comprising subangular micro-aggregates. In this study, the morphological and physical modifications caused by earthworm a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abf7994d59a3034d820817e7c2a1ccfc
https://doi.org/10.1016/j.crte.2011.12.001
https://doi.org/10.1016/j.crte.2011.12.001
Publikováno v:
Biology and Fertility of Soils. 31:30-37
Differently managed oxisols from Central Brazil were studied using a sequential P fractionation procedure because the effects of land use on the distribution of P forms in these soils are barely known. Therefore levels of labile and recalcitrant P fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8606b98508cd8114e61ef307ac7a7ed6
https://doi.org/10.1007/s003740050620
https://doi.org/10.1007/s003740050620
Publikováno v:
Journal of Sustainable Agriculture. 15:95-117
This paper analyzes land use change in the Brazilian savanna and draws out policy implications about the adoption of resource management technologies. Resource management technologies are more likely to be adopted in areas experiencing a long-term de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59d6d558afd401257e07be4de5e22b68
https://doi.org/10.1300/j064v15n02_10
https://doi.org/10.1300/j064v15n02_10
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
https://doi.org/10.1007/s003740050443
Publikováno v:
Journal of Plant Nutrition. 18:2135-2155
Low supply of nutrients is a major limitation of forage adaptation and production in acid soils of the tropics. A glasshouse study was conducted to find differences in plant growth, nutrient acquisition and use, among species of tropical forage grass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fefa07c04ab7cf99b4ef5f29d040e46d
https://doi.org/10.1080/01904169509365052
https://doi.org/10.1080/01904169509365052
Publikováno v:
Plant and Soil. 162:177-182
Soil carbon distribution with depth, stable carbon isotope ratios in soil organic matter and their changes as a consequence of the presence of legume were studied in three 12-year-old tropical pastures (grass alone —Brachiaria decumbens (C4), legum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bb8ea22340adb188f781f165a93e9c5
https://doi.org/10.1007/bf01347704
https://doi.org/10.1007/bf01347704
Publikováno v:
Plant and Soil. 146:21-30
Somaclonal variation offers the possibility to obtain changes in one or a few characters of an otherwise outstanding cultivar without altering the remaining, and often unique, part of the genotype. It has been shown to be heritable for some species.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1acf7b8689da0f1f8c9a93fa43120beb
https://doi.org/10.1007/bf00011991
https://doi.org/10.1007/bf00011991
Autor:
Edmundo Barrios, Marcela Quintero, Edgar Amézquita, Idupulapati M. Rao, Y. Rubiano, Marco Antonio Rondón, Miguel Angel Ayarza
Publikováno v:
Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges and Opportunities ISBN: 9781402057595
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d11e5a5350190258152eb1ab630ff58c
https://doi.org/10.1007/978-1-4020-5760-1_19
https://doi.org/10.1007/978-1-4020-5760-1_19
Autor:
Idupulapati M. Rao, Carlos E. Lascano, Richard J. Thomas, Miguel Angel Ayarza, Raúl R. Vera, Myles J. Fisher, J. I. Sanz
Publikováno v:
Nature. 371:236-238
ESTIMATES of the global carbon dioxide balance have identified a substantial 'missing sink' of 0.4–4.3 Gt per year1. It has been suggested that much of this may reside in the terrestrial biosphere2. Here we present an analysis of the carbon stored
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f53bcb01934953eec95106c1974e8c2e
https://doi.org/10.1038/371236a0
https://doi.org/10.1038/371236a0
Publikováno v:
Repositório Institucional da UnB
Universidade de Brasília (UnB)
instacron:UNB
Pesquisa Agropecuária Brasileira, Vol 35, Iss 6, Pp 1199-1205 (2000)
Pesquisa Agropecuária Brasileira v.35 n.6 2000
Pesquisa Agropecuária Brasileira
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Universidade de Brasília (UnB)
instacron:UNB
Pesquisa Agropecuária Brasileira, Vol 35, Iss 6, Pp 1199-1205 (2000)
Pesquisa Agropecuária Brasileira v.35 n.6 2000
Pesquisa Agropecuária Brasileira
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Os objetivos deste trabalho foram verificar a adsorção de nitrato e identificar as propriedades do solo que mais influenciam este fenômeno, em um Latossolo Vermelho-Escuro, com 56% de argila, em Planaltina, DF. Em 1996 foram coletadas amostras de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cf547cf4adec2eed5c6c8fc5fe54e95
http://repositorio.unb.br/handle/10482/25597
http://repositorio.unb.br/handle/10482/25597