Intensive cultivation - data

Description

Data tables: - Chemical and physical properties of Oxisol in the 0-0.2 and 0.8-1.0 m layers, in Cerrado and intensive cultivation for 1, 17, 22, 28, 32 and 43 years.

Steps to reproduce

Physical and chemical analyzes were carried out, according to Teixeira et al. (2017). The contents of sand, silt, and clay were measured after chemical dispersion in 10 mL of 1 mol L-1NaOH and slow agitation for 16 hours. The sand fraction was separated by sieving, and the silt and clay fractions were separated by differential sedimentation and pipetting. The pH soil was measured by the potentiometric method in water (pHH2O) and 1 mol L-1 KCl (pHKCl) in a 1: 2.5 soil-solution ratio. Soil was extracted with 1 mol L-1 KCl at pH 7.0 and analyzed for extractable Ca and Mg by atomic absorption spectrophotometry. Mehlich-1(0.05 mol L-1 HCl and 0.025 mol L-1 H2SO4) were used for extractable K, Cu, Fe, Zn and Mn, in which K was analyzed by flame emission spectrophotometry and Cu, Fe, Zn and Mn by atomic absorption spectrophotometry. Exchangeable Al was extracted using 1 mol L-1 KCl, followed by titration with 0.025 mol L-1 NaOH. For exchangeable acidity (H+ + Al3+), 0.5 mol L-1 calcium acetate adjusted to pH 7.0 was titrated with 0.06 mol L-1 NaOH. From these results, the sum of bases (BS) and base saturation (PBS) were calculated according to Embrapa (2017). All analysis was carried out in triplicate. The Organic matter (OM) was calculated by OC x 1,724 and organic C (OC) was determined by the method of Walkley & Black (1934).

Institutions

• Universidade Federal de Vicosa

  MG, Vicosa

Categories

Funders

• Coordenação de Aperfeicoamento de Pessoal de Nível Superior

  Federal District, Brazil

  Grant ID: 001
• National Council for Scientific and Technological Development

  Federal District, Brazil

  Grant ID: 140343/2016-4

Licence