2009
DOI: 10.1590/s0103-90162009000200013 View full text |Buy / Rent full text
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Abstract: Land use change and land management practices can modify soil carbon (C) dynamics and soil fertility. This study evaluated the effect of tillage systems (no-tillage -NT and conventional tillage -CT) on soil C and nutrient stocks in an Oxisol from an Amazonian cerrado following land use change. The study also identified relationships between these stocks and other soil attributes. Carbon, P, K, Ca and Mg stocks, adjusted to the equivalent soil mass in the cerrado (CE), were higher under NT. After adoption of al… Show more

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“…Cerrado soils are very nutrient poor because this area is dominated by dystrophic deeply weathered soils characterised by a pseudo-sand structure (Goedert, 1983;Lopes et al, 2004). Thus, to produce high biomass yields, enormous lime application and fertilisation is needed (Carvalho et al, 2009;Yamada, 2005). Several studies have demonstrated the effects of increasing agriculture in the Cerrado, but most have focused on specific aspects of land-use change (e.g.…”
Section: Introductionmentioning
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“…Cerrado soils are very nutrient poor because this area is dominated by dystrophic deeply weathered soils characterised by a pseudo-sand structure (Goedert, 1983;Lopes et al, 2004). Thus, to produce high biomass yields, enormous lime application and fertilisation is needed (Carvalho et al, 2009;Yamada, 2005). Several studies have demonstrated the effects of increasing agriculture in the Cerrado, but most have focused on specific aspects of land-use change (e.g.…”
Section: Introductionmentioning
“…It is used very often in many countries particularly for the development of shrub forest/savanna/cerrado. While the conversion of native land cover through slash and burn followed by cultivation results in a decrease in carbon stocks and an associated increase in CO 2 emissions (Detwiler, 1986;Brown and Lugo, 1990;Lal, 2003;Franchini et al, 2007;Carvalho et al, 2009). In Taiwan, farmers sometimes burn rice straw into ash or more commonly, bury it directly in the soil to provide nutrition for the next growing season.…”
Section: Single Term Terms In 20 Years Total ------------------------mentioning
“…This study thus concludes to the similar point assumed by Shively et al (2004) that little crop carbon is conserved and no carbon economy is available for both rice and sugarcane cropping systems. Concerning about the belowground biomass, suitable agricultural practices are able to increase soil carbon stocks by around 1.5 time (Carvalho et al, 2009). Even though the below-ground carbon could be increased by appropriate tillage operation, the soil organic carbon content in forest is significantly four times higher than agroecosystem (Singh and Ghoshal, 2011).…”
Section: Single Term Terms In 20 Years Total ------------------------mentioning
“…A conventional tillage approach for the cultivation of plants is most frequently used by farmers to reduce soil compaction, to improve aeration and to control weeds (Assis Ju´nior et al 2003;Franchini et al 2007;Crusciol et al 2008;Carvalho et al 2009). However, minimum tillage or no-till cropping are used to reduce erosion, to conserve moisture, to maintain and improve soil quality and to increase production (Doran et al 1998;Allmaras et al 2000;Nyakatawa et al 2000;Kladivko 2001).…”
Section: Introductionmentioning