| 1. |
- Hogland, W, et al.
(författare)
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Physical, chemical and biological processes for optimizing decentralized composting
- 2003
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Ingår i: Compost Science & Utilization. - 1065-657X. ; 11:4, s. 330-336
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Tidskriftsartikel (refereegranskat)abstract
- On-site composting of nonpolluted organic wastes avoids costs and energy for transportation since the volume to be transported can be reduced to about 20% of the original. This paper describes the aerobic processes in a small-scale composting reactor, and evaluates how these processes can be optimized. The optimized composting process has a relatively short turnover time for organic matter; at the same time the temperature of about 60degreesC decreases the problems with pathogens and weeds in the mature compost. The compost produced has a high nutritional value, with high concentrations of especially nitrogen, potassium and phosphorus, while the contamination by heavy metals and other toxic substances are very low.
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| 2. |
- Teka, Kassa, et al.
(författare)
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Effect of Vermicompost on Soil Fertility and Crop Productivity in the Drylands of Ethiopia
- 2024
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Ingår i: Compost Science & Utilization. - 1065-657X .- 2326-2397. ; , s. 1-11
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Tidskriftsartikel (refereegranskat)abstract
- The nutrient type and amount contributed from vermicompost varies depending on thesource material, earthworm type used, agro-ecology and farmers’ management. These call forcrop, soil and site specific study. This study, therefore, aimed at determining: (i) the optimalvermicompost application rate/s for wheat and maize production; and (ii) the role ofvermicompost on soil fertility improvements. Field experiments in three agro-climatic zones(highland, midland and lowlands) were established on wheat and maize crops following arandomized complete block design. The treatments were vermicompost (2.5, 5.0, 7.5 and10 t ha−1), conventional compost (10 t ha−1), and recommended rates of Nitrogen and Phosphorus(NP = 100 kg DAP and 50 kg Urea) fertilizers. Our results revealed that the studied soil chemicalproperties, primarily, organic carbon (OC %), N (%) and available P (mg kg−1) increased withincreasing vermicompost rate. The 10 t ha−1 vermicompost treated plots had 157-210%,64-81% and 100-242% higher soil total nitrogen content as compared to the control, 10 t ha−1conventional compost and NP fertilizer treatments, respectively. Application of 10 t ha−1vermicompost also resulted in a 1.5-fold and 43-63% grain yield increment of both testedcrops compared to the control and NP treated plots, respectively. However, the highest netbenefit was obtained from 5 t ha−1 vermicompost for maize (86% increase) and 10 t ha−1 ofvermicompost for wheat (152% increase compared to the control). In conclusion, vermicompostat 5 t ha−1 for maize and 10 t ha−1 for wheat can be recommended to sustainably managefarm productivity.
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