Search

Your search keyword '"Adgo, Enyew"' showing total 239 results
Start Over Author "Adgo, Enyew" Search Limiters Peer Reviewed
239 results on '"Adgo, Enyew"'

13. Local and regional climate trends and variabilities in Ethiopia: Implications for climate change adaptations

Author

Gashaw, Temesgen, Wubaye, Gizachew Belay, Worqlul, Abeyou W., Dile, Yihun T., Mohammed, Jemal Ali, Birhan, Dereje Ademe, Tefera, Gebrekidan Worku, van Oel, Pieter R., Haileslassie, Amare, Chukalla, Abebe Demissie, Taye, Meron Teferi, Bayabil, Haimanote Kebede, Zaitchik, Benjamin, Srinivasan, Raghavan, Senamaw, Abebe, Bantider, Amare, Adgo, Enyew, and Seid, Abdulkarim

Published
2023
Full Text
View/download PDF

33. Enhancing bulb yield through nitrogen fertilization and the use of hybrid onion (Alluim cepa L.) varieties in northwest Ethiopia.

Author

Yeshiwas, Yebirzaf, Alemayehu, Melkamu, and Adgo, Enyew

Subjects
NITROGEN fertilizers, PHOSPHATE fertilizers, CASH crops, FACTORIAL experiment designs, ONIONS
Abstract

Onions are among the most important cash crops in developing countries, including Ethiopia. However, its production and productivity are very low, which is associated with inappropriate fertilization and the use of low-yielding varieties. Therefore, the present study was conducted to evaluate the effects of the nitrogen fertilizer rate on the growth, yield, and quality of hybrid onion varieties in northwest Ethiopia. The experiment was conducted at three locations (Koga, Woreta, and Woramit) during the 2021/2022 cropping season under irrigated conditions. The treatments consisted of three hybrid onion varieties (Russet, Jambar, Red Coach) and one open-pollinated onion variety (Bombay Red) and four nitrogen rates (0, 41, 82, and 123 kg ha-1), which were laid out in a randomized complete block design with a factorial arrangement of 4*4 in three replications. The results of the present study revealed that onion growth, yield and quality were influenced by the nitrogen fertilizer rate and onion variety across all locations. Compared with the open pollinated Bombay Red variety, the hybrid varieties (Russet and Jambar) performed well in terms of bulb diameter, bulb weight, total yield, marketable bulb yield, and pungency. Nitrogen fertilizer applied at a rate of 82 kg ha-1 resulted in the highest growth and yield parameters of onion. The Russet and Jambar varieties recorded the highest marketable bulb yields of 26.50 t ha-1 and 24.57 t ha-1, respectively. Onion varieties treated with the highest nitrogen fertilizer dosage of 123 kg ha-1, particularly the Bombay Red variety, exhibited the longest duration to reach maturity. Onion plants supplied with 82 kg ha-1 nitrogen presented the highest marketable bulb yields, with a value of 26.77 t ha-1. Too much nitrogen above 82 kg ha-1 leads to decreased yield; hence, excess nitrogen is lost to the environment. Furthermore, the Jambar and Russet hybrid varieties and the application of 82 kg ha-1 nitrogen fertilizers provided the highest net benefit. The hybrid varieties Jambar and Russet and the application of 82 kg ha-1 nitrogen fertilizer can be recommended for onion production in the study area and areas with similar agroecosystems. Since this study is the first of its kind, considering other hybrid onion varieties and optimizing agronomic practices such as spacing and phosphorus fertilizer are also recommended in future research. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

45. Exploring and Modeling the Spatial Variability of Soil Erosion in Tana Basin, Northwestern Ethiopia.

Author

Meshesha, Derege Tsegaye, Belay, Anteneh Wubet, Tiruneh, Gizachew Ayalew, Adgo, Enyew, Alemayehu, Tiringo Yilak, Chandrakala, M., Reichert, José Miguel, and Karuppannan, Shankar

Subjects
UNIVERSAL soil loss equation, SOIL erosion, FORESTS & forestry, SOIL degradation, SOIL productivity
Abstract

Soil degradation exacerbates the depletion of soil resources and poses a threat to agricultural productivity and environmental sustainability. To address this issue, initiatives focusing on soil and water conservation (SWC) were carried out in the Tana Basin watershed located in Ethiopia. However, their spatial distribution, status, and effects of SWC activities on soil erosion were not evaluated in the entire study watershed. Thus, a revised universal soil loss equation (RUSLE) was adopted to identify soil erosion prone areas and evaluate the effect of SWC activities on soil erosion in Ethiopia. The finding shows the average soil loss of the catchment is 18.65 t/ha/year (moderate), and the detached and transported soil is 7934 tons/year. By implementing bunds in croplands and restricting grazing in degraded bushlands, it is feasible to reduce current soil erosion by 47% of the overall soil loss. The catchment area shows varying degrees of soil erosion, with a minimal rate in some areas, while others experience slight, moderate, severe, and very severe rates of soil loss, which make up 15.5%, 13.3%, 12.8%, and 10.9%, respectively. The prediction efficiency of the RUSLE using ground‐measured soil erosion data results (R2 = 0.90) revealed reliability. Consequently, the initial situation (soil bund and enclosure) results in a 47% reduction in erosion, the second situation involves increased expenses in materials and labor by 53% compared to the first scenario, and the third situation converts all deteriorated bushlands into forest land by 10%. Therefore, recommended SWC practices should be adopted in the Kecha and similar watersheds to minimize soil erosion and sustain soil productivity. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

46. Impact of reservoir construction on the sediment budget of a downstream-linked freshwater lake.

Author

Lemma, Hanibal, Nyssen, Jan, Poesen, Jean, Assaye, Habtamu, Adgo, Enyew, and Frankl, Amaury

Subjects
LAKES, RESERVOIR sedimentation, SEDIMENTS, BUDGET cuts, LAKE sediment analysis, LIFE expectancy, SEDIMENTATION & deposition, LAKE sediments
Abstract

We investigated the magnitude of reservoir sedimentation upstream and its sediment-shadow effect on a large downstream-linked lake, Lake Tana (Ethiopia). To better understand the reservoir-induced reductions of fluvial sediment downstream, sediment budgets for two scenarios were developed. The results indicated that reservoir sedimentation is extremely high, with annual storage capacity losses (1–4.2%) exceeding the global average. Consequently, unless mitigation measures are implemented, the reservoirs' dead storage volume will be filled with sediment in less than 42% of their designed life expectancy. The sediment-trapping conditions created by the reservoirs will also reduce sediment inflow from tributaries into the lake by 15–52%, overbank sedimentation on floodplains by 33–48%, and sediment deposition in Lake Tana by 16–54% annually. Overall, under the current environmental set-up, the ongoing and planned reservoir constructions could extend the expected useful lifetime of Lake Tana from 918 to 2022 years. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results