Lenk Ranch, Land Use Change: Forest-to-pasture in a Chronosequence

Local identifier
MRO10, MRO11, MRO12
Years operational
Changes in soil organic matter and chemical characteristics by the introduction of cultivated pasture in a chronologically - we used soil δ13C distributions to determine the origin of soil C and to infer changes to soil C cycling patterns after forest clearing
A native forest (as a reference, open Forest with Palm plants) and two pasture sites established at different times in Rondônia State, Brazilian Amazon Pasture sites: Brachiaria brizantha (20 years old pasture) and Panicum maximum (8 years old pasture)
Data Access Statement
Available to any researcher on request
Data license
Don't know
Data policy
Yes (not online)
Escola Superior de Agricultura "Luiz de Queiroz", University of São Paulo
research organisation
Prof Dr Carlos Eduardo Pellegrino Cerri
principal investigator
Escola Superior de Agricultura "Luiz de Queiroz", University of São Paulo (ESALQ-USP)
Soil Science

Site: Lenk Ranch

farmer field
Local code
MRO10, MRO11, MRO12
Ouro Preto do Oeste
Geographic location
-10.7333333, -62.2166667
© OpenStreetMap contributors
228 Metres
Visits permitted?
Soil type
Soil description
tropical latosol (Medium/Clay) oxisols (USDA soil taxonomy)
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
sand content0 – 10 Centimetres61 Percent
clay content0 – 10 Centimetres23 Percent
soil density0 – 10 Centimetres1.24 gram per cubic centimetre
soil pH0 – 10 Centimetres5.5
soil total carbon0 – 10 Centimetres1.59 Percent
total soil nitrogen0 – 10 Centimetres0.13 Percent
Climatic type
tropical rainforest / equatorial climate
Climate description
This city has a tropical climate. In winter, there is much less rainfall than in summer. According to Köppen and Geiger, this climate is classified as Aw. The average annual temperature in Ouro Preto do Oeste is 24.3 °C. In a year, the average rainfall is 1922 mm.
Climate properties
VariableTime periodValue (range)Units
air temperature 1990 – 1990 25.6 degree Celsius

Design period: (1970—1990)

CropYears grown
Brachiaria brizantha 1970—1990
Panicum maximum 1982—1990
primary forest

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