 | | Climatologists fear prolonged drought in Sahelian zone |
 | | Mosquito control aided by tiny fish with big appetite |
 | | New cropping system reveals promise for low-input farming |
 | | Frogs' usefulness cited in campaign to ban their export from India |
 | | Loss of markets feared for Sudan's gum arabic output |
 | | New species, techniques help to rehabilitate African fishponds |
 | | Local language use helping to spread new farming techniques |
 | | Integrated approach adopted by Rwanda for fishery project |