News & Updates feed

  • Spatially-Explicit Farmgate Price Data in Africa: Why We Should Care and What to Do About It

    The use of inorganic fertilizer and other purchased inputs remains very low amongst African smallholder farmers. A central hypothesis about why this is the case, is that fertilizer use is simply not profitable, given the effective price of fertilizer at the farm gate, as well as the farm gate price ...

  • Looking for a needle in a haystack: The trials and tribulations of spatial sampling frames

    Collecting and using large amounts of geo-referenced data, all part of so-called ‘big data’, is all the rage these days.  In TAMASA we have a spatial sampling frame for collecting household and farmer yield data, which on a map looks very neat and tidy, and eminently ‘doable’.  For example, in ...

  • Why is farmer yield so hard to predict spatially?

    There is increasing interest, and use, for spatial and temporal estimates of on-farm or farmer yield. These data are most obviously needed for food security assessments and national or regional planning (i.e. greatest need and greatest opportunity for investment). Sustainable intensification and closing the yield gap are very much in ...