Pub Date : 1900-01-01DOI: 10.20431/2454-9487.0602002
Lands have been utilized intensively for all purposes at the expense of their suitability, which have resulted in massive land degradation (Senjobi and Ogunkunle, 2011; Ahukaemere et al., 2012). Land degradation has serious impact on soil physical and chemical properties especially the infiltration, bulk density, organic matter, porosity and aggregate stability causing their compaction and erosion (Tukahirwa, 2003). It has been reported that unsystematic changes in land use predisposes it to several environmental problems such as desertification, acidification, eutrophication, greenhouse effect that cause climate change and biodiversity loss (Reichstein, 2008).
土地被集中用于各种目的，牺牲了其适宜性，这导致了大规模的土地退化(Senjobi和Ogunkunle, 2011;Ahukaemere et al.， 2012)。土地退化对土壤的物理和化学性质产生严重影响，特别是对入渗、容重、有机质、孔隙度和团聚体稳定性造成的压实和侵蚀(Tukahirwa, 2003)。据报道，土地利用的非系统变化使其易于出现若干环境问题，如荒漠化、酸化、富营养化、温室效应，导致气候变化和生物多样性丧失(Reichstein, 2008)。
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Pub Date : 1900-01-01DOI: 10.20431/2454-9487.0504005
Yechalew Sileshi, M. Hailemariam, Behailu Atero, A. Tesfaye
This experiment was carried out using ten linseed varieties; conducted during the 2015/2016 and 2016/2017 main cropping season at Dedo, Semodo and Gech in South Western parts of Ethiopia. The experimental design was RCBD with three replications. Data were collected on eight quantitative morphological traits with the objectives of to test the performance of released linseed varieties on yield and yield related components at South Western parts of Ethiopia and to select well adapted varieties for the tested location. The across location analysis showed significant differences (p<0.05) among varieties and locations (p<0.05) for most of the parameters, including grain yield. However, the interactions; (L*V) and (L*V*Y) showed non-significant differences. Mean grain yield ranged from 1.55 t/ha to 2.06 t/ha. The three high yielding varieties Blistar (2.06 t/ha), Kulumsa-1 (2.05 t/ha) and Jeldu (1.94 t/ha) are recommended for Dedo, Gechi and Somodo, and similar areas in Jimma, Buno Bedele and Ilu-Ababora zones. Therefore, these varieties have to be promoted to the farmer.
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