Impact of rainfed and irrigated agriculture systems on soil carbon stock under different climate scenarios in the semi-arid region of Brazil

André L CARVALHO, Renato A ARAÚJO-NETO, Guilherme B LYRA, Carlos E P CERRI, Stoécio M F MAIA

Table 1 Adopted land management systems in different period of Delmiro Gouveia, Pariconha, and Inhapi districts

District Site Adopted management systems in differnet period Native vegetation Cultivation Pasture Fallow Delmiro Gouveia EqNV 1900-2014 - - - EqCC15 1900-1999 2000-2003, 2005-2009, and 2011-2014 - 2004 and 2010 EqCC4 1900-2010 2011-2014 - - Pariconha EpNV 1900-2014 - - - EpPa10 1900-1973 1974-1975, 1978-1982, 1985-1989, 1992-1996, and 1999-2003 2005-2014 1976-1977, 1983-1984, 1990-1991, 1997-1998, and 2004 EpCC4 1900-2010 2011-2014 - - Inhapi U1NV 1900-2014 - - - U1CC30 1900-1985 1986-1990, 1992-1996, 1999-2003, 2006-2010, and 2012-2014 - 1991, 1997-1998, 2004-2005, and 2011