scholarly journals Assessment of potential of natural pasture and other feed resources in sweet potato production system of Shebedino District, Sidama Zone, SNNPRS, Ethiopia

2015 ◽  
Vol 6 (8) ◽  
pp. 91-98 ◽  
Author(s):  
N Tegene ◽  
G Dinku ◽  
B Mohammed
Keyword(s):  
Sweet Potato ◽  
Production System ◽  
Potato Production ◽  
Feed Resources ◽  
Natural Pasture

scholarly journals Large-Scale Seedling Grow-Out Experiments Do Not Support Seed Transmission of Sweet Potato Leaf Curl Virus in Sweet Potato

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 139
Author(s):  
Sharon A. Andreason ◽  
Omotola G. Olaniyi ◽  
Andrea C. Gilliard ◽  
Phillip A. Wadl ◽  
Livy H. Williams ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Large Scale ◽  
Seed Transmission ◽  
Potato Production ◽  
Potato Leaf ◽  
Vector Transmission ◽  
Leaf Curl Virus ◽  
Seed Coats ◽  
Potato Seedlings ◽  
Leaf Curl

Sweet potato leaf curl virus (SPLCV) threatens global sweet potato production. SPLCV is transmitted by Bemisia tabaci or via infected vegetative planting materials; however, SPLCV was suggested to be seed transmissible, which is a characteristic that is disputed for geminiviruses. The objective of this study was to revisit the validity of seed transmission of SPLCV in sweet potato. Using large-scale grow-out of sweet potato seedlings from SPLCV-contaminated seeds over 4 consecutive years, approximately 23,034 sweet potato seedlings of 118 genotype entries were evaluated. All seedlings germinating in a greenhouse under insect-proof conditions or in a growth chamber were free of SPLCV; however, a few seedlings grown in an open bench greenhouse lacking insect exclusion tested positive for SPLCV. Inspection of these seedlings revealed that B. tabaci had infiltrated the greenhouse. Therefore, transmission experiments were conducted using B. tabaci MEAM1, demonstrating successful vector transmission of SPLCV to sweet potato. Additionally, tests on contaminated seed coats and germinating cotyledons demonstrated that SPLCV contaminated a high percentage of seed coats collected from infected maternal plants, but SPLCV was never detected in emerging cotyledons. Based on the results of grow-out experiments, seed coat and cotyledon tests, and vector transmission experiments, we conclude that SPLCV is not seed transmitted in sweet potato.

scholarly journals Food Security and Income through Sweet Potato Production in Teso, Uganda

2017 ◽  
Vol 7 (1) ◽  
pp. 146
Author(s):  
William Faustine Epeju ◽  
Peter Milton Rukundo
Keyword(s):  
Food Security ◽  
Sweet Potato ◽  
Quantitative Methods ◽  
Potato Production ◽  
Grain Legumes ◽  
Agricultural System ◽  
Sweet Potatoes ◽  
Sustainable Food ◽  
Qualitative And Quantitative Methods ◽  
Adequate Food

Two relevant studies on food security are referred to in the article. Food insecurity from time to time threatens in Teso sub region which houses a viable Teso agricultural system. One study was done during 2001-2003 in Teso on sweet potato production with 650 persons participating and the second one was done in one disaster affected area of Bududa District nearby during 2012-2016 when 1,142 persons participated. Kiryandongo District where Bududa landslide survivors were resettled in Uganda was included in that study. Participatory methods such as focus group discussions, farm observations, in-depth interviews, and questionnaires were used. Both studies used qualitative and quantitative methods for data analysis. The sweet potato stands second after cassava as the crop for famine and disaster periods in Teso to meet the human right to adequate food to complement the well dried cereals & grain legumes that stored longer. Livestock especially was also one of the prime determinants of food security and income in Teso. Free from cyanides with a good content of affordable Vitamin A from orange fleshed varieties, sweet potatoes in Teso contributed about 61% to the yearly food per capita of the population thus a recommendable crop for sustainable food security and some income in Teso and beyond. 

Simulation model for the sequential in-field machinery operations in a potato production system

2015 ◽  
Vol 116 ◽  
pp. 173-186 ◽  
Author(s):  
K. Zhou ◽  
A. Leck Jensen ◽  
D.D. Bochtis ◽  
C.G. Sørensen
Keyword(s):  
Simulation Model ◽  
Production System ◽  
Potato Production

scholarly journals The use of humic acid urea fertilizer for increasing yield and utilization of nitrogen in sweet potato  

2017 ◽  
Author(s):  
Chen Xiaoguang ◽  
Kou Meng ◽  
Tang Zhonghou ◽  
Zhang Aijun ◽  
Li Hongmin
Keyword(s):  
Humic Acid ◽  
Sweet Potato ◽  
Production Efficiency ◽  
Potato Production ◽  
Utilization Rate ◽  
Nitrogen Accumulation ◽  
Storage Root ◽  
Nitrogen Absorption ◽  
Storage Roots ◽  
Urea Fertilizer

Humic acid urea fertilizer (HA-N) is a new type of slow-release nitrogenous fertilizer that can enhance utilization rate of urea, and consequently increases crop yield. However, there were few researches about the effect of HA-N on the nitrogen absorption and utilization in sweet potato production. Hence, the effect of HA-N on nitrogen accumulation and distribution, nitrogen use efficiency (NUE), and yield of sweet potato was studied in the field using the <sup>15</sup>N tracer technique. Results showed that HA-N significantly increased the number of storage roots per plant and the average fresh weight per storage root, as well as the yield increased by 29.6% compared with urea fertilizer. Furthermore, nitrogen accumulation of total plant was higher under the HA-N. In addition, HA-N significantly increased nitrogen production efficiency of fertilizer and nitrogen production efficiency. Results of a <sup>15</sup>N tracer experiment revealed that the percentage of nitrogen absorbed by plant from fertilizer increased from 31.1% to 38.7% and NUE increased from 33.5% to 44.8% with application of HA-N when compared with single N treatment, respectively. HA-N significantly increased sweet potato storage root yield, nitrogen absorption and NUE, as well as it reduced the loss of nitrogen fertilizer.  

scholarly journals The Significance of Sweet Potato Feathery Mottle Virus in Subsistence Sweet Potato Production in Africa

Plant Disease ◽  
1998 ◽  
Vol 82 (1) ◽  
pp. 4-15 ◽  
Author(s):  
R. F. Karyeija ◽  
R. W. Gibson ◽  
J. P. T. Valkonen
Keyword(s):  
Sweet Potato ◽  
Potato Production ◽  
Mottle Virus

scholarly journals ASSESSING THE EFFICIENCY OF SWEET POTATO PRODUCERS IN THE SOUTHERN REGION OF ETHIOPIA

2017 ◽  
Vol 54 (4) ◽  
pp. 491-506 ◽  
Author(s):  
ADUGNA JOTE ◽  
SHIFERAW FELEKE ◽  
ADANE TUFA ◽  
VICTOR MANYONG ◽  
THOMAS LEMMA
Keyword(s):  
Technical Efficiency ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Stochastic Frontier ◽  
Allocative Efficiency ◽  
Potato Production ◽  
Southern Region ◽  
Efficiency Improvement ◽  
Study Region ◽  
Current Utilization

SUMMARYApplying stochastic frontier Cobb–Douglas production function, the study assessed the efficiency of sweet potato (Ipomoea batatas) producers in the Southern region of Ethiopia. The study revealed the existence of fairly large technical inefficiency in sweet potato production. The technical efficiency ranged from 12.6 to 93.7%, with more than half of the producers above the mean efficiency level (66.1%). This suggests that there is room for output gains through technical efficiency improvement. If the average producers in the study region are to achieve the technical efficiency level of the most efficient producer in the sample (93.7%), they can realize nearly 30% output gains. The analysis of allocative efficiency also revealed that sweet potato producers were producing sweet potato with sub-optimal utilization of production inputs, suggesting that potential for output gains remains to be exploited through reconfiguration of the existing resource use. They can make more value out of their sweet potato production by reconfiguring their current utilization of production inputs in favour of more land and manure but less seed rate. Furthermore, age and education are important determinants of the efficiency of sweet potato production. In view of these findings, it is advisable to put in place appropriate extension intervention programmes that enable sweet potato producers to exploit the potential gains in sweet potato output through technical and allocative efficiency improvement.

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