@Article{TrabaquiniGalvFormArag:2017:SoLaUs,
author = "Trabaquini, Kleber and Galv{\~a}o, L{\^e}nio Soares and
Formaggio, Antonio Roberto and Arag{\~a}o, Luiz Eduardo Oliveira
e Cruz de",
affiliation = "Epagri and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
title = "Soil, land use time, and sustainable intensification of
agriculture in the Brazilian Cerrado region",
journal = "Environmental Monitoring and Assessment",
year = "2017",
volume = "189",
number = "2",
pages = "70",
month = "Feb.",
keywords = "Agriculture, Cerrado, Food security, Land use change, Remote
sensing, Soil nutrients.",
abstract = "The Brazilian Cerrado area is in rapid decline because of the
expansion of modern agriculture. In this study, we used extensive
field data and a 30-year chronosequence of Landsat images
(19802010) to assess the effects of time since conversion of
Cerrado into agriculture upon soil chemical attributes and
soybean/corn yield in the Alto do Rio Verde watershed. We
determined the rates of vegetation conversion into agriculture,
the agricultural land use time since conversion, and the temporal
changes in topsoil (020 cm soil depth) and subsurface (2040 cm)
chemical attributes of the soils. In addition, we investigated
possible associations between fertilization/over-fertilization and
land use history detected from the satellites. The results showed
that 61.8% of the native vegetation in the Alto do Rio Verde
watershed was already converted into agriculture with 31% of soils
being used in agriculture for more than 30 years. While other
fertilizers in cultivated soils (e.g., Ca+2, Mg+2, and P) have
been compensated over time by soil management practices to keep
crop yield high, large reductions in Corg (38%) and Ntot (29%)
were observed in old cultivated areas. Furthermore, soybean and
cornfields having more than 10 years of farming presented higher
values of P and Mg+2 than the ideal levels necessary for plant
development. Therefore, increased risks of over-fertilization of
the soils and environmental contamination with these
macronutrients were associated with soybean and cornfields having
more than 10 years of farming, especially those with more than 30
years of agricultural land use.",
doi = "10.1007/s10661-017-5787-8",
url = "http://dx.doi.org/10.1007/s10661-017-5787-8",
issn = "0167-6369",
language = "en",
targetfile = "trabaquini_soil.pdf",
urlaccessdate = "27 abr. 2024"
}