Your search found 3 records
1 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.
2 Birner, R.; Gupta, S.; Sharma, N. 2011. The political economy of agricultural policy reform in India: fertilizers and electricity for irrigation. Washington, DC, USA: IFPRI. 231p.
Political aspects ; Economic aspects ; Agricultural policy ; Fertilizers ; Urea ; Groundwater irrigation ; Food production ; Food security ; Electricity supplies ; Pricing ; Government departments ; Farmers / India / Andhra Pradesh / Panjab
(Location: IWMI HQ Call no: 630 G635 BIR Record No: H044808)
http://www.ifpri.org/sites/default/files/publications/rr174.pdf
https://vlibrary.iwmi.org/pdf/H044808.pdf
https://vlibrary.iwmi.org/pdf/H044808.pdf
(1.15 MB) (1.15 MB)
3 Islam, S. M. M.; Gaihre, Y. K.; Islam, Md. R.; Ahmed, Md. N.; Akter, M.; Singh, U.; Sander, B. O. 2022. Mitigating greenhouse gas emissions from irrigated rice cultivation through improved fertilizer and water management. Journal of Environmental Management, 307:114520. (Online first) [doi: https://doi.org/10.1016/j.jenvman.2022.114520]
Irrigated rice ; Greenhouse gas emissions ; Emission reduction ; Irrigated farming ; Water management ; Global warming ; Fertilizers ; Nitrous oxide ; Methane emission ; Urea ; Use efficiency ; Crop management ; Integrated plant nutrient management / Bangladesh / Gazipur
(Location: IWMI HQ Call no: e-copy only Record No: H050888)
https://www.sciencedirect.com/science/article/pii/S0301479722000937/pdfft?md5=0eaa9b512d6b0a05efd7497c1b19b265&pid=1-s2.0-S0301479722000937-main.pdf
https://vlibrary.iwmi.org/pdf/H050888.pdf
https://vlibrary.iwmi.org/pdf/H050888.pdf
(0.91 MB) (928 KB)
Greenhouse gas (GHG) emissions from agriculture sector play an important role for global warming and climate change. Thus, it is necessary to find out GHG emissions mitigation strategies from rice cultivation. The efficient management of nitrogen fertilizer using urea deep placement (UDP) and the use of the water-saving alternate wetting and drying (AWD) irrigation could mitigate greenhouse gas (GHG) emissions and reduce environmental pollution. However, there is a dearth of studies on the impacts of UDP and the integrated plant nutrient system (IPNS) which combines poultry manure and prilled urea (PU) with different irrigation regimes on GHG emissions, nitrogen use efficiency (NUE) and rice yields. We conducted field experiments during the dry seasons of 2018, 2019, and 2020 to compare the effects of four fertilizer treatments including control (no N), PU, UDP, and IPNS in combination with two irrigation systems— (AWD and continuous flooding, CF) on GHG emissions, NUE and rice yield. Fertilizer treatments had significant (p < 0.05) interaction effects with irrigation regimes on methane (CH4) and nitrous oxide (N2O) emissions. PU reduced CH4 and N2O emissions by 6% and 20% compared to IPNS treatment, respectively under AWD irrigation, but produced similar emissions under CF irrigation. Similarly, UDP reduced cumulative CH4 emissions by 9% and 15% under AWD irrigation, and 9% and 11% under CF condition compared to PU and IPNS treatments, respectively. Across the year and fertilizer treatments, AWD irrigation significantly (p < 0.05) reduced cumulative CH4 emissions and GHG intensity by 28%, and 26%, respectively without significant yield loss compared to CF condition. Although AWD irrigation increased cumulative N2O emissions by 73%, it reduced the total global warming potential by 27% compared to CF irrigation. The CH4 emission factor for AWD was lower (1.67 kg ha-1 day-1) compared to CF (2.33 kg ha-1 day-1). Across the irrigation regimes, UDP increased rice yield by 21% and N recovery efficiency by 58% compared to PU. These results suggest that both UDP and AWD irrigation might be considered as a carbon-friendly technology.
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