1. 1/4/1992 Feedback on an article on farming in volcanic ash.
  2. 19/12/1991 We Are Beginning Our Second Decade! Sudanese Experience With Neem To Control Pests Some Helpful Facts About Salinity Caution About Using Moringa Tree Roots As A Horseradish Substitute Guidelines For Farmers Near Volcanos Who Must Now Plant In Fresh Volcanic Ash Use Of Partially Buried Flower Pots...