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Auteur V.R. Vallejo |
Documents disponibles écrits par cet auteur (4)
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Communication à un Congrès (avec Actes)
Hydrolisable nitrogen in forest soils: the case of a cork oak forest at Les Gavarres (Gerona, Spain)
R. Pons ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Three methods of soil nitrogen availability assessment have been compared in Mediterranean forest soils: successive hydrolysis, autoclaving and short-term aerobic incubation. The results of autoclaving were similar to those obtained in the first[...]Communication à un Congrès (avec Actes)
F. Carceller ; M.A. Santacecilia ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Three plots have been selected in different forest ecosystems in the Moncayo Natural Park (Zaragoza): two deciduous oak forests (Quercus petraea and Quercus pyrenaica) located at an altitude of 1050 m, and a beech forest at 1300 m. Litter produc[...]Communication à un Congrès (avec Actes)
I. Serrasolsas ; A. Ferran ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Litter evolution is studied in plots of increasing age after fire: from 2 months to 30 years. During the first year, the L horizon decomposed quickly. The process was described by the decreasing of the L/F ratio during this period. From second y[...]Communication à un Congrès (avec Actes)
D. Rosich ; A. Castelló ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The input and decomposition of litter, and the C/N ratio evolution was studied for 2 years in evergreen oak forests in the Catalonian Central Basin. The decay constant, k, obtained was 0.365. The C/N ratio had a sharp decrease in the initial 7 m[...]