<?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%">Francaviglia, Rosa</style></author><author><style face="normal" font="default" size="100%">Benedetti, Anna</style></author><author><style face="normal" font="default" size="100%">Doro, Luca</style></author><author><style face="normal" font="default" size="100%">Madrau, Salvatore</style></author><author><style face="normal" font="default" size="100%">Ledda, Luigi</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Influence of land use on soil quality and stratification ratios under agro-silvo-pastoral Mediterranean management systems</style></title><secondary-title><style face="normal" font="default" size="100%">Agriculture, Ecosystems &amp; Environment</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">C:N</style></keyword><keyword><style  face="normal" font="default" size="100%">mediterranean systems</style></keyword><keyword><style  face="normal" font="default" size="100%">Microbial biomass</style></keyword><keyword><style  face="normal" font="default" size="100%">Microbial quotient</style></keyword><keyword><style  face="normal" font="default" size="100%">Soil organic carbon</style></keyword><keyword><style  face="normal" font="default" size="100%">Stratification ratio</style></keyword><keyword><style  face="normal" font="default" size="100%">Total N</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><publisher><style face="normal" font="default" size="100%">Elsevier B.V.</style></publisher><volume><style face="normal" font="default" size="100%">183</style></volume><pages><style face="normal" font="default" size="100%">86-92</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">a b s t r a c t A case study from north-eastern Sardinia (Italy) in semiarid conditions is presented. Agriculture is mainly extensive and markedly agro-silvo-pastoral, and is typical of similar areas of the Mediterranean basin. The following land uses at different levels of crop intensification were considered: tilled vineyard (TV), no-tilled grassed vineyard (GV), hay crop and pasture with sparse cork oaks (HC and PA), semi-natural systems (SN, former vineyards set-aside about 30 years ago), cork oak forest (Quercus suber L.) established in the past century (CO). Some soil quality parameters were considered: soil organic carbon (SOC) and total N (TN) concentrations, stocks and their stratification ratios with depth (SRs), microbial biomass carbon (MBC) and its quotient to SOC (qmic), and C:N ratios. Both in terms of concentrations and stocks, SOC and TN were generally higher in HC, PA, CO and SN: in these land uses SOC in the topsoil were in the range 17.0–24.3 g kg−1 and 48.9–65.4 t ha−1; TN values were 1.07–2.08 g kg−1 and 3.1–6.0 t ha−1. SOC and TN SRs under the CO land use were higher than 4, quite above the proposed threshold (?2), &gt;2 in GV, and ≥2.0 in PA. MBC in mg kg−1 and qmic in ?g g−1 were higher under CO (194 and 0.89) and GV (156 and 0.97). C:N ratios had optimum or nearly optimum (9–12) values in CO, PA and the GV, in agreement with the SRs, MBC and qmic. A positive and significant correlation was found between SOC and TN concentrations in all the land uses. ©</style></abstract></record></records></xml>