Publications 2018-05-10T15:06:47+00:00

Quantification of total element concentrations in soils using total X-ray fluorescence spectroscopy (TXRF)

Total X-ray fluorescence spectroscopy (TXRF) determines concentrations of major and trace elements in multiple media. We developed and tested a method for the use of TXRF for direct quantification of total element concentrations in soils using an S2 PICOFOX™ spectrometer (Bruker AXS Microanalysis GmbH, Germany).


Africa Soil Profiles Database, Version 1.1. A compilation of geo-referenced and standardized legacy soil profile data for Sub Saharan Africa

The Africa Soil Profiles Database is a compilation of georeferenced and standardised legacy soil profile data for Sub-Saharan Africa. Version 1.1 (March 2013) identifies 16,711 unique soil profiles inventoried from a wide variety of data sources and includes profile site and layer attribute data. Soil analytical data are available for 13,835 profiles of which 12,683 are georeferenced, including the attributes as specified by GlobalSoilMap.net.


Soil hydraulic information for river basin studies in semi-arid regions

Water retention and hydraulic conductivity characteristics of the soil are indispensable for hydrological catchment modelling and for quantifying water limited agricultural production. However, these characteristics are often not available for regions and data scarcity for tropical zones is even bigger than for temperate zones.


The challenges of collating legacy data for digital mapping of Nigerian soils

It is well known that the world is rich with soil data resulting from the efforts of past soil surveys. However, the majority of these data is largely unused. These legacy soil data come in the form of soil maps, soil survey reports, soil profile descriptions, and/or in the format of antiquated "card catalogue".


Soil Heterogeneity and Soil Fertility Gradients in Smallholder Agricultural Systems of the East African Highlands

Heterogeneity in soil fertility in these smallholder systems is caused by both inherent soil-landscape and human-induced variability across farms differing in resources and practices. Interventions to address the problem of poor soil fertility in Africa must be designed to target such diversity and spatially heterogeneity.


Empirical estimates of uncertainty for mapping continuous depth functions of soil attributes

We use an empirical method where model output uncertainties are expressed as a prediction interval (PI) of the underlying distribution of prediction errors. This method obviates the need to identify and determine the contribution of each source of uncertainty to the overall prediction uncertainty.


Financial Value of Nitrogen Fixation in Soybean in Africa: Increasing Benefits for Smallholder Farmers

The knowledge that soil microorganisms form an important component of below ground biodiversity, providing ecosystem services, is often not incorporated in formulation of policies to conserve and manage these microorganisms.


Effects of improved fallow with Sesbania sesban on maize productivity and Striga hermonthica infestation in Western Kenya

Striga hermonthica is a major constraint to smallholder subsistence agriculture production in the sub-Saharan African region. Low soil fertility and overall environmental degradation has contributed to the build-up of the parasitic weed infestation.


The Solution to Global Warming Could Be in the Soil

Soil biota can be used to sequester carbon in the soil. Important in this prospect are the possibilities of increasing soil macro-fauna abundance and their diversity to enhance vegetative decomposition, humufication, soil aggregation and increased biomass accumulation.


Developing SoilML as a global standard for the collation and transfer of soil data and information

There is an increasing need to collect, collate and share soil data and information within countries, across regions and globally. Timely access to consistent and authoritative data and information is critical to issues related to food production, climate change, water management, energy production and biodiversity.

Contact Us