<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Zucca, Claudio</style></author><author><style face="normal" font="default" size="100%">Canu, Annalisa</style></author><author><style face="normal" font="default" size="100%">Previtali, Franco</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Soil degradation by land use change in an agropastoral area in Sardinia (Italy)</style></title><secondary-title><style face="normal" font="default" size="100%">Catena</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Agropastoral practices</style></keyword><keyword><style  face="normal" font="default" size="100%">BQI (Biological Quality Index)</style></keyword><keyword><style  face="normal" font="default" size="100%">Deforestation</style></keyword><keyword><style  face="normal" font="default" size="100%">microporosity</style></keyword><keyword><style  face="normal" font="default" size="100%">soil erosion</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil organic carbon</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier B.V.</style></publisher><volume><style face="normal" font="default" size="100%">83</style></volume><pages><style face="normal" font="default" size="100%">46-54</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In recent decades the clearing of Mediterranean maquis along with the creation of new pastures has been a major factor of land degradation in Sardinia (Italy). This was due to an inadequate implementation of agricultural policies. Consequently, tillage and water erosion intensiﬁed over a wide area. The present work assesses the impacts of land use change on soil properties in a representative area of central-eastern Sardinia. Paired forest and pasture sampling sites were selected in relation to present land use, land suitability, and land use history. Different soil properties were considered: physical (sand, silt, clay, soil thickness, bulk density, and penetration resistance), chemical (pH, OC, N, C/N, Ca, Mg, Na, K, CEC, and BS), biological (BQI), and micromorphological (microporosity and microstructure). The comparison of forest and pasture soils showed a signiﬁcant soil loss (in terms of soil thickness, −22%), and a clear decrease in organic carbon storage (−64% on average). An increase in bulk density (+44%) and a change in microporosity and its vertical distribution were also observed, respectively by ﬁeld measurements and micromorphological quantiﬁcation on digital images.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Merzouki, A</style></author><author><style face="normal" font="default" size="100%">Lossaint, P</style></author><author><style face="normal" font="default" size="100%">Billes, G</style></author><author><style face="normal" font="default" size="100%">Rapp, M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">L'impact du déboisement sur l'azote minéral susceptible d'être absorbé par un taillis de chêne vert (Quercus ilex L) en reconstitution</style></title><secondary-title><style face="normal" font="default" size="100%">Ann. For. Sci.</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Deforestation</style></keyword><keyword><style  face="normal" font="default" size="100%">holm oak coppice</style></keyword><keyword><style  face="normal" font="default" size="100%">nitrate</style></keyword><keyword><style  face="normal" font="default" size="100%">nitrogen availability</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex L</style></keyword><keyword><style  face="normal" font="default" size="100%">shoots</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1990</style></year></dates><volume><style face="normal" font="default" size="100%">47</style></volume><pages><style face="normal" font="default" size="100%">633-641</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The impact of deforestation on the mineral nitrogen available during restoration of the holm oak (Quercus ilex L) coppice. The impact of deforestation on the biological activity of a mediterranean red soil was studied from January 1984 to April 1986 within a holm oak (Quercus ilex L) stand after clearcut. Part of the study involved the estimation of the amount of nitrogen available for vegetation both in the mature holm oak coppice and in the 1-2-yr-old recovery stand. The study indicates that the new shoots essentially took up nitrate nitrogen; however, the mature site used both nitrate and ammonium nitrogen as nitrogen source. The availability of mineral nitrogen, essentially nitrate, ranged from 47.4 to 118.6 kg·ha -1·yr-1 in the rebuilding site and 25.6 to 63.9 kg·ha-1·yr-1 in the mature stand. At the control site, ammonium nitrogen represented 43% of the total nitrogen available.</style></abstract></record></records></xml>