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Communication à un Congrès (avec Actes)
E. Luis ; R. Tárrega ; T. Zuazúa ; L. Calvo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Three shrubland zones have been studied with the aim of knowledge the regeneration of shrub vegetation community after the impact of several degenerative and drastic processes as rooting up, cutting or fire. Four control plots of about 100 m2 we[...]
Communication à un Congrès (avec Actes)
I. Santa Regina ; J.F. Gallardo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Data of the bioelement cycles from the three forest systems are shown. The ecosystems are: a climax Quercus pyrenaica forest; a paraclimax Costanea sativa grove and a disclimax Pinus sylvestris forest. The three sites are near one from each othe[...]
Communication à un Congrès (avec Actes)
A. Moyano ; J.F. Gallardo ; A. Prieto | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The carbon and nitrogen contents of the ploughed layers from Salamanca province cultivated soils have been determined. From these data is established that there are no change in organic matter contents throughout thirty years (1954-1983). The ac[...]
Communication à un Congrès (avec Actes)
L. Calvo ; E. Luis ; R. Tárrega | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989First phases of regeneration in three types of heath communities after fire, cutting and uprooting in experimental plots have been studied, devoting a particular attention to the herbaceous species. Greater rate of perennial than annual species [...]
Communication à un Congrès (avec Actes)
J.F. Gallardo ; I. Santa Regina ; C. San Miguel | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The biomass and litter mineral content of three forest ecosystems of the Sierra de Bojar are been determined. No significant differences have been found in the total chemical composition of the different litter constituents of the three forest e[...]
Communication à un Congrès (avec Actes)
E. Luis ; E. Garzón ; R. Tárrega ; L. Calvo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Soil physical and chemical characteristics of 38 shrub communities, located in Leon province, have been studied and compared with the dominant ligneous species. All the samples have been compared using a factorial analysis of principal component[...]
Communication à un Congrès (avec Actes)
M. Rico | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989A study is made of aspects related to the structure of grassland communities occupying contrasted positions on slopes. Thirty slopes were chosen in the dehesa zone of the province of Salamanca (Spain); in each, the communities occupying the most[...]Série
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