02428naa a2200385 a 450000100080000000500110000800800410001910000220006024501180008226000090020052013750020965000130158465000150159765000140161265000090162665000160163565000090165165000170166065300230167765300160170065300150171665300250173165300150175670000280177170000150179970000220181470000200183670000320185670000250188870000210191370000200193470000220195470000170197677300490199321062352024-07-16       2019    bl uuuu     u00u1 u    #d1 aSANTANA, M. da S.  aCarbon and nitrogen stocks of soils under different land uses in Pernambuco state, Brazil.h[electronic resource]  c2019  aAcrisols, Ferralsols, Leptosols and Planosols were sampled in layers down to 1 m under dense caatinga, open caatinga, pasture and agriculture. Agricultural Leptosols and Planosols had the lowest C and N concentrations among the land uses, although in some cases differences were not statistically significant. On average, conversion of dense caatinga to agriculture reduced C stocks from63 to 47 Mg ha?1. Acrisols had the highest concentrations of C and N, and Planosols had the lowest concentrations and stocks. Conversion to pasture did not reduce stocks, but open caatinga also had lower C stocks (50 Mg ha?1) than dense caatinga. Nitrogen stocks did not differ among land uses, implying that losses are greater for C than for N. Despite the fact that the western portion of Pernambuco state covers 3% of the Brazilian semi-arid area, it stocks about 0.20 Pg of C (and 0.019 Pg of N), which represents 2% of the total estimated soil C stock in the semiarid region (8.9 Pg). Therefore, the stock per hectare in the west portion of Pernambuco is about one-third smaller than the stock per hectare in the whole Brazilian semiarid region, probably a consequence of the lower average C concentration in the 20 cm superficial layer, a higher proportion of agricultural fields and shallower depths of some soil classes inwestern Pernambuco than in the whole semiarid region.  aAcrisols  aFerralsols  aPlanosols  aSoil  aNitrogênio  aSolo  aUso da Terra  aEstoque de carbono  aLeptossolos  aPernambuco  aProfundidade do solo  aSemiárido1 aSAMPAIO, E. V. de S. B.1 aGIONGO, V.1 aMENEZES, R. S. C.1 aJESUS, K. N. de1 aALBUQUERQUE, E. R. G. M. de1 aNASCIMENTO, D. M. do1 aPAREYN, F. G. C.1 aCUNHA, T. J. F.1 aSAMPAIO, R. M. B.1 aPRIMO, D. C.  tGeoderma Regionalgv. 16, e00205, Mar. 2019.