Effect of biochar amendment on dry season shallot yield in the Keta sand spit of Ghana

The Keta sand spit is an important area for vegetable production because it overlies an easily accessible ground-water reservoir used for irrigation. However, in the dry season, yields of salt-sensitive vegetables such as shallots (A/lium cepa L) are threatened by increased salinity of irrigation water. Biochar is emerging as a solution for reducing sa­linity stress in crops. A field experiment was conducted in the dry season (January - March) of 2015 in the Keta sand spit to detennine the effect of biochar on shallot yield. Rice straw biochar at a rate of O and 3% was applied to soil at 20 cm depth. All treat­ments had 1 31