img_4074

Production Systems Modeling

Crop productivity and resource use efficiency in biomass webs

Problem statement:

Most parts of Sub-Saharan Africa are characterized by low crop productivity and large yield gaps. However, there is also scope to increase food production, e.g. through better management of crop and cropping systems by using more inputs like fertilizers or agrochemicals, irrigation, crop substitution or improved seeds. To avoid that increasing intensification and extension of cropland for biomass products will pose growing pressure on the natural resource base it will be required to use resources more efficiently and intensify agricultural production systems in a sustainable way.

Objectives:

  1. Identify spatial patterns of yield gaps comparing current and potential biomass production by maize and cassava
  2. Determine the current resource use efficiency in maize and cassava based biomass production systems
  3. Propose suitable site-specific measures to increase biomass productivity and resource use efficiency

Research questions:

  1. How large is the current biomass yield gap of maize and cassava in the project regions?
  2. Are there spatial patterns in the current and potential biomass supply and in resource use efficiency?
  3. Which site-specific management measures are most effective to reduce productivity gaps and increase resource use efficiency?

Methodology:

Based on a geospatial database on climate, soils, crop management and biomass production in Ghana, Ethiopia and Nigeria and on validated biophysical large-scale biomass production models for maize and cassava, WP2.1 will carry out an assessment of spatial patterns of biomass production and resources use efficiency. Improved management options as developed by the project partners will be implemented in the models to simulate scenarios of new production systems and their impact on biomass production and resource use efficiency.

Countries of research:

  • Ghana
  • Nigeria
  • Ethiopia

Involved partners:

  • International Institute of Tropical Agriculture (IITA), Nigeria
  • Kwame Nkrumah University for Science and Technology (KNUST), Ghana
  • Savanna Agricultural Research Institute (CSIR-SARI), Ghana
  • Addis Ababa University, Faculty of Agriculture, Ethiopia
  • Ethiopian Institute of Agricultural Research (EIAR), Ethiopia
  • University of Bonn, Institute of Crop Science and Resource Conservation, Germany

Investigators:

  • Dr. Thomas Gaiser
    Senior Researcher
    University of Bonn
    Institute of Crop Science and Resource Conservation (INRES)
    Email: tgaiser@uni-bonn.de
  • Prof. Dr. Frank Ewert
    Team Leader
    Institute of Crop Science and Resource Conservation (INRES)
  • Dr. Adebayo Abass
    Senior Researcher
    International Institute of Tropical Agriculture (IITA)
  • Dr. Wilson Agyare
    Senior Researcher
    Center for Development Research (ZEF)
  • Dr. Amit Kumar Srivastava, Dr. Stefan Siebert, John Opata
    Senior Researcher
    Institute of Crop Science and Resource Conservation (INRES)
  • Demba Trawally, Jumoke Sobamowo
    Junior Researcher
    Institute of Crop Science and Resource Conservation (INRES)