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| dc.contributor.author | Yazie, Alemayehu | |
| dc.date.accessioned | 2020-03-18T07:09:21Z | |
| dc.date.available | 2020-03-18T07:09:21Z | |
| dc.date.issued | 2020-03-18 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/10613 | |
| dc.description.abstract | Agriculture has to be performed in a sustainable way in order to sustain high yields and to Support a globally growing population. Functional soil properties are fundamental for high Yields and in order to achieve good soil conditions sustainable management is a key. Loss of soil organic material and increased soil acidity are problems associated with degradation of soils and hence less sustainable agriculture In this thesis, the effect of wood ash application on soil acidity remediation, soil pH, soil fertility, organic matter, macro and micro nutrients’ content improvement and agricultural yield was examined. The use of wood ash to remediate soil acidity, to improve soil pH and increase soil fertility, formerly a common practice, it was largely abandoned at the start of the 20th century when alternative products arrived on the market (agricultural lime, nitrate of potash). Burning large quantities of wood industry residues for energy purpose, contributed to increase availability of wood ash in market. Very large quantity of ash produced yearly in our country and only a significant amount of this product was recycled as soil amendment in the last few years being applied for agricultural purposes. Literature clearly shows that using ash is efficient for the correction of soil acidity and contributes to bring nutrients to crops. Ash applications to soil also generally allow increase in crop yields compared to agricultural limestone. Its economic value has been estimated between 20 and 65 $/tm for a normal ash. Its agricultural use could also reduce greenhouse gases emission, which may lead to credits of carbon. However, ash quality varies, mainly because of wood type, burning conditions and water addition. In addition, alkalinity, potassium and dust contents require both environmental and agronomic precautions. Government regulations and commercial standards (BNQ) govern their use. However, this underlying framework must be complemented with best agronomic practices. Both regulations and best practices allow safe and economical use of ash in agriculture, in accordance with sustainable development. | en_US |
| dc.language.iso | en | en_US |
| dc.subject | Environmental Engineeringin | en_US |
| dc.title | Soil Acidity Remediation by Using Geravilea Wood Ash In Case Study Area, Zenzelema | en_US |
| dc.type | Thesis | en_US |
