LIBROS DEL AUTOR: helena barros

7 resultados para LIBROS DEL AUTOR: helena barros

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  • Stocks de carbone et d’azote dans différentes pratiques de gestion des sols
    José Deomar de Souza Barros / Lúcia Helena Garófalo Chaves
    La transformation des écosystèmes naturels en systèmes agricoles entraîne le remplacement de systèmes biologiques complexes et stables par des systèmes simples et instables, provoquant ainsi une modification des stocks de composants organiques du sol, en modifiant les taux d’ajout et de décomposition de la matière organique. Cela modifie l’équilibre des cycles du carbone (C) et...
    Disponible

    93,62 €

  • Kohlenstoff- und Stickstoffvorräte bei unterschiedlicher Bodenbewirtschaftung
    José Deomar de Souza Barros / Lúcia Helena Garófalo Chaves
    Durch die Umwandlung natürlicher Ökosysteme in landwirtschaftliche Systeme werden komplexe und stabile biologische Systeme durch einfache und instabile Systeme ersetzt, was zu einer Veränderung der Bestände an organischen Bodenbestandteilen führt, da sich die Zugangs- und Abbauraten organischer Substanzen verändern. Dadurch wird das Gleichgewicht der Kohlenstoff- (C) und Sticks...
    Disponible

    93,62 €

  • Carbon and nitrogen stocks in different soil management practices
    José Deomar de Souza Barros / Lúcia Helena Garófalo Chaves
    The transformation of natural ecosystems into agricultural systems involves the replacement of complex and stable biological systems with simple and unstable systems, thus causing changes in the stocks of organic components in the soil by altering the rates of addition and decomposition of organic matter. As a result, the balance of the carbon (C) and nitrogen (N) cycles is alt...
    Disponible

    93,50 €

  • Carbon and nitrogen stocks in different soil management practices
    José Deomar de Souza Barros / Lúcia Helena Garófalo Chaves
    La trasformazione degli ecosistemi naturali in sistemi agricoli comporta la sostituzione di sistemi biologici complessi e stabili con sistemi semplici e instabili, provocando così una modifica delle riserve dei componenti organici del suolo, poiché altera i tassi di aggiunta e decomposizione della materia organica. Di conseguenza, l’equilibrio dei cicli del carbonio (C) e dell’...
    Disponible

    93,56 €

  • Zapasy węgla i azotu w różnych metodach uprawy gleby
    José Deomar de Souza Barros / Lúcia Helena Garófalo Chaves
    Przekształcenie naturalnych ekosystemów w systemy rolnicze powoduje zastąpienie złożonych i stabilnych systemów biologicznych prostymi i niestabilnymi systemami, co powoduje zmianę w zasobach składników organicznych gleby poprzez zmianę tempa dodawania i rozkładu materii organicznej. W rezultacie równowaga cyklu węglowego (C) i azotowego (N) ulega zmianie, a dopływ węgla staje ...
    Disponible

    93,56 €

  • Design of Reinforced Concrete Sections Under Bending and Axial Forces
    Carla Ferreira / Helena Barros / Joaquim Figueiras
    This book contains auxiliary calculation tools to facilitate the safety assessment of reinforced concrete sections. Essential parameters in the design to the ultimate limit state of resistance such as the percentage of reinforcement and the position of the neutral axis in concrete cross-sections, as well as the control of the maximum stresses in service limit states are provide...
    Disponible

    48,34 €

  • Design of Reinforced Concrete Sections Under Bending and Axial Forces
    Carla Ferreira / Helena Barros / Joaquim Figueiras
    This book contains auxiliary calculation tools to facilitate the safety assessment of reinforced concrete sections. Essential parameters in the design to the ultimate limit state of resistance such as the percentage of reinforcement and the position of the neutral axis in concrete cross-sections, as well as the control of the maximum stresses in service limit states are provide...
    Disponible

    99,03 €