Dataset
Soil profile and chemistry data in the Ankeniheny Zahamena forest corridor, Madagascar

This resource is made available under the terms of the Open Government Licence

Razakamanarivo, H.; Razafimbelo, T.; Andriamananjara, A.; Rianahary, A.; Razafindrakoto, M.; Harinirina, A. (2017)
https://doi.org/10.5285/c3884aa0-b083-469d-8a0d-fdbbb79aff05

Data comprise soil profile (soil texture and pit description during fieldwork) and soil chemistry (bulk density, carbon content, carbon stock and organic carbon content obtained with 13 carbon isotope analysis) from samples taken in the Ankeniheny Zahamena forest corridor, Madagascar.
Data were collected as part of a project funded by the Ecosystem Services for Poverty Alleviation (ESPA) programme under work package 4 P4GES project, grant references: NE/K008692/1, NE/K010115/1, and NE/K010220-1.

Publication date: 2017-03-03

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Format of the dataset: Comma-separated values (CSV)

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This resource is made available under the terms of the Open Government Licence

You must cite: Razakamanarivo, H.; Razafimbelo, T.; Andriamananjara, A.; Rianahary, A.; Razafindrakoto, M.; Harinirina, A. (2017). Soil profile and chemistry data in the Ankeniheny Zahamena forest corridor, Madagascar. NERC Environmental Information Data Centre. https://doi.org/10.5285/c3884aa0-b083-469d-8a0d-fdbbb79aff05

 

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© Laboratoire des Radio Isotopes, Université d’Antananarivo

Acknowledgement of the Laboratoire des Radio Isotopes, Université d'Antananarivo is required for products derived from these data

This dataset is part of the following

Where/When

Study area
Temporal extent
2013-06-01    to    2017-02-28

Quality

Lineage
Two methods were applied for the soil sampling. One for bulk density samples and the other for soil carbon sampling.
Soil sampling by auger for soil carbon determination. It is done in the 4 subplots every 10 cm depth for 0 to 100 cm. That means 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, 40-50 cm, 50-60 cm, 60-70 cm, 70-80 cm, 80-90 cm and 90-100 cm depth.
Soil sampling by cylinder for bulk density sampling. The metallic cylinder used for this sampling has a diameter of 8.1cm. It was performed in the soil pits located in the 3 subplots (subplot n°1, n°2 and n°3), according to the depths: 0-10 cm, 10-20 cm, 20-30 cm, 50-60 cm and 80-90 cm. These samples are used for the bulk density measurement. Some samples, to estimate the moisture were also taken in addition to these samples to the cylinder.
Soil profile description. This activity was conducted in the subplot 1 soil pit located in the center of each plot, with a depth of 1.30 m. Its objectives was to determine and describe the different soil horizons, know their colors (by using the soil color of Munsell), their textures and structures and root depth. The abundance of roots and porosity were also observed and recorded.

Soil sample were labelled and sent to the sample preparation room, where they undergo the following preparations:
- air drying at least 3 days
- sieving through a sieve with 2 mm size
- sieved sample collected in a plastic bag and weighed again
- coarse soil (rocks) and coarse root fraction > 2 mm were also recovered in another bag and weighed
- for classic soil analysis were done on the soil sample, it was ground to 200 microns
Different type of analysis is used for the quantification of the soil organic carbon.
Soil drying to determine the moisture. To determine the moisture of the soil samples, they are dried in stoves at 105°C during 48 hours. After, they are weighted and the moisture is obtained by the difference between the weight before and after the drying.
Walkley & Black method. The Walkley-Black titration method is one of the classical methods for rapid analysis of soil organic carbon. The organic material is oxidized without external heating by a sulfuric potassium dichromate solution. It is considered that the heat of solution of H2SO4 (120 ° C) is sufficient to oxidize 77% of carbon. The excess dichromate is determined by Mohr's salt (NH4) 2 Fe (SO4) 2, 6 H2O. The data obtained using these chemical analysis served as calibration reference for further soil analysis using spectrometry.

Mid Infra Red Spectroscopy (MIRS) soil analysis. The MIRS approach appeared to be a relatively recent soil analysis method. The principle is based on the absorption of infrared radiation by the organic matter. This absorption is related to the chemical composition of the samples. The measure of the light intensity absorbed at each wavelength leads to a characteristic spectrum of the studied product. Subsequently, it predicts the carbon organic contents by interpretation of the spectra.

Carbon stable isotope analysis using 13C. A few soil samples were collected according their land use and carbon stock along the soil profile. These samples were sent to the Laboratoire de Biochimie et Physiologie Moléculaire des Plantes (LBMP montpelier) for stable isotope analysis.

Authors

Laboratoire des Radio Isotopes, Université d'Antananarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo
Laboratoire des Radio Isotopes, Université d'Antananarivo

Other contacts

Point Of Contact
Laboratoire des Radio Isotopes, Université d'Antananarivo
Publisher
Custodian
Distributor

Spatial

Spatial representation type
Tabular (text)
Spatial reference system
WGS 84 longitude-latitude (CRS:84)

Keywords

Topic categories
Economy
Environment
Other keywords
soil
carbon
delta 13C
bulk density
MIRS
INSPIRE Theme
Environmental Monitoring Facilities
Place keywords
Madagascar
CAZ
Ankeniheny Zahamena forest corridor
Project keywords
ESPA

Dataset identifiers

https://catalogue.ceh.ac.uk/id/c3884aa0-b083-469d-8a0d-fdbbb79aff05
doi:10.5285/c3884aa0-b083-469d-8a0d-fdbbb79aff05

Metadata

Record identifier
c3884aa0-b083-469d-8a0d-fdbbb79aff05
Record created by
Environmental Information Data Centre
United Kingdom
Record last updated
2017-10-31T15:36:58