Your search found 4 records
1 Kone, D.; Gallizzi, K.; Drescher, Silke; Cofie, Olufunke; Zurbrugg, C.; Forster, D.; Montangero, A.; Awuah, E.; Strauss, M. 2004. Efficiency of helminth eggs inactivation in dewartered faecal sludge by co-composting. In Godfrey, S. (Ed.) Proceedings of the 30th WEDC International Conference on People-Centered Approaches to Water and Environmental Sanitation, Vientiane, Lao PDR, 25-28 October 2004. Leicestershire, UK: Water, Engineering and Development Centre (WEDC). pp.21-25.
(Location: IWMI-HQ Call no: IWMI 628.3 G200 KON Record No: H035919)
2 Adamtey, Noah; Cofie, Olufunke; Ofosu-Budu, G. K.; Danso, S. K. A.; Forster, D.. 2009. Production and storage of N-enriched co-compost. Waste Management, 29:2429-2436. [doi: https://doi.org/10.1016/j.wasman.2009.04.014]
Waste management ; Urban wastes ; Household wastes ; Solid wastes ; Composts ; Composting ; Production ; Techniques ; Fertilizers ; Excreta ; Urea ; Urban agriculture ; Inorganic fertilizers ; Nitrogen fertilizers ; Heavy metals ; Farmers ; Health hazards / Africa South of Sahara / West Africa / Ghana / Accra
(Location: IWMI HQ Call no: e-copy only Record No: H042259)
(0.62 MB)
Recovery of the organic fraction of municipal waste for peri-urban agriculture could contribute to the improvement of environmental sanitation and increase agricultural productivity in Sub-Saharan Africa. However, municipal waste co-compost (Co) has low nitrogen (N) content. Therefore, this study investigated the type and form of inorganic N fertiliser that is capable of improving the nitrogen content of Co and monitored the changes in the properties of this N-enriched product under storage. To attain 30,000 mg kg1 (3%) N content, different amounts of urea or ammonium sulphate were applied in various forms (dry, paste and liquid) to enrich Co. The product termed comlizer was stored and its moisture, pH, total nitrogen, NHþ4 -N, NO3 –N, and C/N ratio were monitored under ambient conditions for two years. In the first four months of storage, total N content of 50 kg Co + 3.26 kg urea (CoUD) increased from 31,333 to 54,000 mg kg1, and 50 kg Co + 7.14 kg (NH4)2SO4 (CoASD) from 35,333 to 52,000 mg kg1. At the end of two years of storage, the initial N content of CoUD and CoASD decreased by 47% and 24%, respectively. Based on these results, it is recommended that dry (NH4)2SO4 should be used in N enrichment of Co, and that the comlizer should be stored in sealed bags but not more than four months.
3 Adamtey, Noah; Cofie, Olufunke; Ofosu-Budu, G. K.; Forster, D.. 2009. Economic impact of N-enriched excreta-based co-compost (Comlizer) on maize production in Ghana. Urban Agricultur. Sandec News, July 2009, 10:17.
(Location: IWMI HQ Call no: e-copy only Record No: H042725)
(0.06 MB)
Poor soil fertility is a key factor limiting crop production in many parts of the tropics. Nitrogenenriched waste products have the potential to improve crop yield on depleted soils and provide high financial returns.
4 Adamtey, Noah; Cofie, Olufunke; Ofosu-Budu, G. K.; Ofosu-Anim, J.; Laryea, K. B.; Forster, D.. 2010. Effect of N-enriched co-compost on transpiration efficiency and water-use efficiency of maize (Zea mays L.) under controlled irrigation. Agricultural Water Management, 97(7):995–1005. [doi: https://doi.org/10.1016/j.agwat.2010.02.004]
(Location: IWMI HQ Call no: IWMI 631.7.2 G200 ADA Record No: H042817)
(0.58 MB)
Population growth, urban expansion and economic development are increasing competition for water use between agriculture and other users. In addition, the high rate of soil degradation and declining soil moisture in the Sub-Saharan African Region have called for several crop production management and irrigation options to improve soil fertility, reduce water use by crops and produce ‘more crops per drop of water’. Notwithstanding this, considerable variations exist in the literature on water-use efficiency, WUEcwu (economic yield per water used) for maize (Zea mays L.) across climates and soil management practices. Different views have been expressed on the effect of different rates of nitrogen (N) application on transpiration efficiency, TE (biomass produced per unit ofwater transpired). The objectives of the study were to assess the effect of different rates of N-enriched municipal waste co-compost and its derivatives on TE, WUEcwu and yield of maize (Z. mays L.) in comparison to inorganic fertiliser. The greenhouse pot experiment was conducted in Accra, Ghana on a sandy loam soil (Ferric Lixisol) using a split plot design. The main plot treatmentswere soil (S), dewatered faecal sludge(DFS), municipal solidwaste compost (C),co-compost from municipal solid waste and dewatered faecal sludge (Co), compost enriched with (NH4)2SO4 (EC), co-compost enriched with (NH4)2SO4 (ECO), (NH4)2SO4 and NPK15–15–15 + (NH4)2SO4. The sub-plot treatments were different rates of application of nitrogen fertiliser applied at the rate of 91, 150 and 210 kg N ha1 respectively. Maize cv. Abelehii was grown in a poly bag filledwith 15 kg soil. Eight plants per treatment were selected randomly and used for the collection of data on growth parameters forth-nightly. At physiological maturity two plants per treatment were also selected randomly from each treatment plot for yield data. The results showed that TE of maize (Z. mays) varied for the different treatments and these are 6.9 Pa in soil (S) alone to 8.6 Pa in ECO. Increase in N application rate increased TE at the vegetative phase for fast nutrient releasing fertilisers (DFS, ECO, EC, NPK + (NH4)2SO4, (NH4)2SO4) and at the reproductive phase for slow nutrient releasing fertilisers (C and CO). Water-use efficiency increased significantly as rate of N application increased. Treatment ECO improved crop WUEcwu and was 11% and 4 times higher than that forNPK + (NH4)2SO4 or soil alone; and 18–36% higher than those for DFS and CO. Treatment ECO used less amount of water to produce drymatter yield (DMY) and grain yield (GY) that was 5.2%and 12.6%, respectively, higher thanNPK + (NH4)2SO4. Similarly, the DMY and GY for ECO was 8.9–18.5% and 23.4–34.7%, respectively, higher than DFS and CO. High nutrient (N and K) uptake, TE, and low leaf senescence accounts for 83% of the variations in DMY whereas WUEcwu accounts for 99% of the variations in GY. Thus, the study concluded that different sources of fertiliser increased TE and WUEcwu of maize differently as N application rate increases.
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