Identification

Title

Biophysical measurements from Ethiopia’s Awassa region during the drought and subsequent floods of 2015-2016

Abstract

This dataset contains the biophysical measurements (mineral nitrogen, percent carbon, percent nitrogen, percent soil moisture, particle size analysis and aggregate stability) from soil collected from farmers’ fields in the Halaba district, Southern Nations, Nationalities and Peoples’ Region in Ethiopia, after the drought of 2015 – 2016. Eighteen farms from 4 kebeles (Asore, Lay Arisho, Konicha and 1st Choroko) were sampled. Soil cores were taken from fields classed as “home”, “near” and “far” from the homestead and were taken from two depths (0-20cm and 20-50cm). Soil cores were taken after the El Niño event of 2015/16, so reflect the resilience of different areas of the farm to drought. This dataset was collected as part of the NERC-funded project Building Resilience in Ethiopia's Awassa region to Drought (BREAD). Full details about this dataset can be found at https://doi.org/10.5285/024c5a61-5114-41a6-93b8-e3fb4d24622b

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/sd/024c5a61-5114-41a6-93b8-e3fb4d24622b.zip

name: Supporting information

description: Supporting information available to assist in re-use of this dataset

function: information

https://data-package.ceh.ac.uk/data/024c5a61-5114-41a6-93b8-e3fb4d24622b

name: Download the data

description: Download a copy of this data

function: download

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/024c5a61-5114-41a6-93b8-e3fb4d24622b

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

Soil water

fertility zones within the household

NE/P004830/1

BREAD

Geographic location

West bounding longitude

33.047

East bounding longitude

48.604

North bounding latitude

15.708

South bounding latitude

2.108

Temporal reference

Temporal extent

Begin position

2015-01-01

End position

2016-12-31

Dataset reference date

date type

publication

effective date

2019-04-16

Frequency of update

Quality and validity

Lineage

The biophysical measurements were collected from farmers’ fields in Halaba District near Hawassa (SNPPR, Ethiopia), after the drought of 2015 – 2016. Combined with the data provided by the ALTER project (deposited on the EIDC), this provides measurements of soil carbon (C), nitrogen (N) and water characteristics before and after the drought. Soil cores were collected from fields classed as “home”, “near” and “far” from the homestead. This corresponds to fields at increasing distance from the household, but does not equate to a set distance; it is more a reflection of the typical land uses in the fields. Measurements are provided at the surface (0-20cm) and below the plough layer (20-50cm). Measurements were collected from fields belonging to farmers with different wealth status (poor medium and rich) in 4 kebeles (parishes); 18 farms were sampled in each kebele. Percent N and percent C in the soil were measured by CNS elemental analyser, Soil pH was measured using a pH meter, 1:5 in CaCl2. Mineral N measurements include nitrate, nitrite and ammonium in μmol per g soil. Nitrate and nitrite were determined by measuring absorbance over a period of 5 hours at a wavelength of 540nm. Ammonium was determined using the indophenol method by measuring absorbance for 30 minutes using a 620 nm wavelength. Soil moisture measurements include the soil moisture content when sampled and at -10 kPa (% by weight). It was not possible to obtain intact cores from Ethiopia or to conduct analysis in country due to equipment availability. Therefore, disturbed soil was repacked into collars and soils were saturated for 48 hours (some were hydrophobic) and then dried to -10 kPa matric potential using a tension table. This potential was selected to represent field capacity due to the sandy nature of this soil. Particle size and aggregate stability were measured for Asore and Lay Arisho only. The percent silt, sand and clay were determined by Laser-diffraction analysis (LDA). Aggregate stability was determined following the wet-sieving method. Bulk density measurements were not taken. However, pedotransfer functions have been derived from the ALTER measurements that allow bulk density to be determined from soil texture and C content.

Conformity

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Comma-separated values (CSV)

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

If you reuse this data, you should cite: Smith, J., Hallett, P., Nayak, D., Boke, S., Habte, M., Yakob, G., Rivington, M., Phimister, E. (2019). Biophysical measurements from Ethiopia’s Awassa region during the drought and subsequent floods of 2015-2016. NERC Environmental Information Data Centre https://doi.org/10.5285/024c5a61-5114-41a6-93b8-e3fb4d24622b

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2021-10-06T14:50:25

Metadata language

eng