High-resolution seismic investigation of Lake Tana, northern Ethiopia

2007 ◽  
Vol 5 (4) ◽  
pp. 243-250 ◽  
Author(s):  
C. Richard Bates ◽  
Henry F. Lamb ◽  
Mohammed Umer
1986 ◽  
Author(s):  
P.A. Berge ◽  
J.R. Evans ◽  
J.J. Zucca ◽  
W.M. Kohler ◽  
W.D. Mooney ◽  
...  

2010 ◽  
Vol 10 (2-4) ◽  
pp. 271-279 ◽  
Author(s):  
Goraw Goshu ◽  
Denis Byamukama ◽  
Mohammed Manafi ◽  
Alexander K.T. Kirschner ◽  
Andreas H. Farnleitner

2020 ◽  
Vol 48 (5) ◽  
pp. 751-764
Author(s):  
Tewachew Asmare ◽  
Biadgilgn Demissie ◽  
Amare Gebremedhin Nigusse ◽  
Abraha GebreKidan

2020 ◽  
Author(s):  
Adugnaw Admas ◽  
Smegnew Melese ◽  
Amare Genetu ◽  
Berhane Kidane ◽  
Zewdu Yilma ◽  
...  

AbstractIn the recent years medicinal and other economical important plants are getting attention due to the presence of therapeutically important active contents; however over exploitation and propagation problems are the major concern for conservation of several econmically important plant species. Among economical imprortant plants an attempt has been made to develop a propagation method for African sandalwood (Osyris lanceolata) by air layering approach aiming at providing an alternative propagation technique to the use of seeds or cuttings that germinate or root poorly. Air layers were applied root hormone to the stem branches of Osyris lanceolata (still attached to the plant) during Novmbere 2019, at Bazawit Hill, Nothern Ethiopia at edge of Blue-Nile River from its source at Lake Tana. Root initiation were starts after 12 weeks of the experments.The factors assessed in this experiment were the effect IBA as rooting promoter at three concentrations (0,50, 100 and 150 ppm). From the data collected it was observed 88.8% rooting were achieved from air layers in the mother plants it selef those treated by IBA hormone and the controls not responding root.Making this propagation technique is a viable alternative to the use of seed or cutting propagation. Rooting response success were influenced by application of rooting hormone of IBA, soil composition and the seasons. At a rate of 150 ppm 100% all expermented plants were intiated and primarly other than other treatmeants responded root. The significance enhancing of root making on Osyris lanceolata plants stem via air layers is linked to the advantage of more rooting hormone concentartion.


2021 ◽  
Author(s):  
Mare Desta ◽  
Gete Zeleke ◽  
William A. Payne ◽  
Mengistie Kindu

Abstract BackgroundThis study aims to investigate the impact of rice price on expansion of rice production and traditional wetland management in Fogera Wetlands, on the eastern shore of Lake Tana, northern Ethiopia. Although rice is becoming a major cash crop in the area, it has not been given due attention for sustainability of wetland which has been traditionally integrated with different indigenous agricultural activities such as, livestock rearing, cultivation different crops. The major instruments implemented in data collection were questionnaire, key informant interviews and Focus Group Discussions (FGD) of sampled farmers as well as GIS and Remote Sensing. Survey questionnaire was administered to 385 rice-producing sampled farmers. ResultsThe result shows that 87% of the respondents confirm that increases in prices of rice encouraged them to shift from cultivation of conventional crops to rice farming. Subsequently, between the years 1973 and 2014, wetland areas has been reduced from 3114ha to 1060ha. Major activities being pursued in the wetlands of the study site do not consider their environmental impacts. Natural resource management and conservation policies and strategies implemented in the area didn't consider local people and their knowledge. It needs consideration to create sense of ownership of wetland resources to reduce abusive utilization of the wetland resources. Conclusion Therefore, the of policies, strategies and development activities implementation have to consider environmental issues togerther with rice production.


2013 ◽  
Vol 42 (2) ◽  
pp. 326-336 ◽  
Author(s):  
Christof Mueller ◽  
Susanne Woelz ◽  
Sven Kalmring

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