<p>Biogas can be a clean cooking alternative where biomass is the dominant source of cooking energy and where feedstock for anaerobic digestion is available.&nbsp; By substituting woody biomass for energy, biogas may reduce local deforestation. Tanzania has more than 15.6 million goats. Dairy goats of different breeds are found in the&nbsp; mid-to high altitudes of the country. Population density has made firewood increasingly scarce and there are few energy alternatives in mountainous areas such as in the Uluguru Mountains. In Mgeta ward, Morogoro region, introduction of Norwegian dairy goats in the 1980s has improved livelihoods in the area. In this study, goat manure was assessed as feedstock for biogas and as fertilizer. Field work among small-holder dairy goat farmers in Mgeta was conducted to measure daily&nbsp; manure production, and to provide&nbsp; a basic model for&nbsp; prediction of the quantity of&nbsp; droppings which&nbsp; may&nbsp; be&nbsp; collected&nbsp; by&nbsp; farmers. Biogas&nbsp; and&nbsp; fertilizer&nbsp; potential&nbsp; from&nbsp; goat&nbsp; manure was compared to cow&nbsp; and&nbsp; pig&nbsp; manure. Buswell&rsquo;s&nbsp; formula was used to&nbsp; calculate approximate&nbsp; methane&nbsp; yield. The&nbsp; results&nbsp; show that&nbsp; goat manure&nbsp; from&nbsp; Mgeta&nbsp; can&nbsp; yield 167 l∙kg Volatile Solids-1 (VS).&nbsp; Compared&nbsp; with&nbsp; other&nbsp; substrates&nbsp; approximate&nbsp; methane yield can be ranked as pig &gt; guatemala grass &gt; cow &gt; goat. The average goat of 25 kg in&nbsp; Mgeta&nbsp; leaves&nbsp; 61 kg&nbsp; Total Solids&nbsp; (TS) droppings&nbsp; per&nbsp; year.&nbsp; It was estimated&nbsp; that&nbsp; 15 goats∙capita-1 would be required to meet the total cooking energy needs of small-holder households in the study location. N:P:K content in goat manure (TS) is 2:1:1, similar to cow&nbsp; and&nbsp; pig&nbsp; manure.&nbsp; Goat&nbsp; droppings had to&nbsp; be&nbsp; macerated&nbsp; to&nbsp; reduce&nbsp; particle&nbsp; size&nbsp; for anaerobic&nbsp; digestion.&nbsp; Biogas&nbsp; from&nbsp; dairy&nbsp; goats&nbsp; could&nbsp; be&nbsp; combined&nbsp; with&nbsp; the&nbsp; year-round irrigated&nbsp; horticulture&nbsp; production&nbsp; in&nbsp; Mgeta.&nbsp; Vegetable gardens&nbsp; in&nbsp; the&nbsp; slope&nbsp; below&nbsp; the digesters could be fertilized by gravitation with the NH4+-rich bioslurry, to save labour and increase yields.</p>

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