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Potato irrigation scheduling and straw mulching
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. Burgers --- Department of Plant Production, P.C. Nel --- Department of Plant Production,The effect of mulching and irrigation frequency on tuber yield was investigated during three seasons at the Glen Agricultural Research Institute The soil on the experimental site consisted of a loamy sand topsoil and sandy clay subsoil with 94 mm... -
Invloed van kaliumdraende bemestingstowwe op knolopbrengs en persentasie droëmateriaal van Solanum tuberosum L. knolle
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.G. Bester --- , Republiek van Suid-Afrika P. C.J. Maree --- Departement Akkerbou en Weiding, Republiek van Suid-AfrikaKNO3 het onder beheerde voedings en omgewingstoestande 'n hoër knolopbrengs as KCl en K2SO4 getoon. Alhoewel KCl 'n hoër knolopbrengs as K2SO4 gegee het, was dit net in 1985 oor alle cultivars (cv. BP1, Vanderplank, Up-to-date, Pimpernel) beduidend. KNO3 het... -
Allelopathic effect of sweetpotato (Ipomoea batatas) cultivars on certain weed and vegetable species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa Ruth Meissner --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaA glasshouse study was conducted to determine the allelopathic potential of sweetpotato (Ipomoea batatas (L.) Lam.) cultivars Bosbok, Brandal and Koedoe. Nine indicator plants, three weeds: yellow nutsedge (Cyperus esculentus L.), purple nutsedge (Cyperus rotundus L.) and common pigweed (Amaranthus... -
Development of a sequence characterized amplified region (SCAR) marker for the identification of the potato cultivars Astrid and Mnandi
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.S. Jansen van Rensburg --- , South Africa I.A. Dubery --- Department of Biochemistry, South AfricaAstrid and Mnandi are two closely related potato cultivars of commercial importance in Southern Africa. Random amplified polymorphic DNA (RAPD) markers were screened and a sequence characterized amplified region (SCAR) marker was developed to distinguish between these two cultivars since... -
Evaluation of petiole nitrate measurement as an aid for N fertilization of potatoes (Solanum tuberosum L.) on sandy soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.P. Brink --- Department of Agronomy and Pastures, N. J.J. Combrink --- Department of Agronomy and Pastures, F.H. Knight --- Department of Agriculture, Western Cape,Potatoes are produced in the Sandveld of the Western Cape on soils with extremely low clay and organic material contents. A low nitrogen mineralisation potential and high leaching hazard complicate the management of the nitrogen supply to the plant. This... -
Effect of temperature, soil moisture content and type of cutting on establishment of sweet potato cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Belehu --- Department of Plant Production and Soil Science, Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaEffective rooting is essential for successful crop establishment from cuttings. The objective of this study was to determine the effect of temperature and soil water content on the root and shoot growth during the early establishment of sweet potato cuttings... -
Variation of agronomic traits of potato somaclones produced by meristem culture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Viive Rosenberg --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Marje Särekanno --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Katrin Kotkas --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Virge Vasar --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Ann Ojarand --- Plant Biotechnological Research Centre EVIKA Saku, EstoniaFollowing a thermotherapy virus eradication procedure potato plantlets were multiplied as meristem clones in vitro. The agronomic traits of meristem clones were compared in field trials over three years. A total of 16 meristem clones of cultivar Agric dzeltenie and... -
Genotype × environment interaction for root yield of elite sweet potato (Ipomoea batatas (L) lam.) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Tekalign --- Department of Plant Sciences, EthiopiaA study was conducted to determine stability of root yield, and the nature and magnitude of genotype × environment interaction in sweet potato using six recently introduced and one farmers' cultivar, which were grown at four locations for three consecutive... -
Comparison between traditional and scientific irrigation scheduling practices for furrow irrigated potatoes (Solanum tuberosum L.) in Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: EB Geremew --- Department of Plant Production and Soil Science, South Africa JM Steyn --- Department of Plant Production and Soil Science, South Africa JG Annandale --- Department of Plant Production and Soil Science, South AfricaTraditional irrigation schemes constitute about 40% of the total irrigated land in Ethiopia. Despite this, the sector has been overlooked and not supported by improved water management technologies. A survey conducted on one of the schemes, Godino, indicated that farmers... -
Phylogenetic studies of selected isolates of Potato virus Y (PVY) infecting vegetable crops in KwaZulu-Natal, Republic of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JD Ibaba --- Discipline of Plant Pathology, School of Agricultural, Earth and Environmental Science, South Africa A Gubba --- Discipline of Plant Pathology, School of Agricultural, Earth and Environmental Science, South AfricaPhylogenetic relationships of Potato virus Y (PVY) isolates infecting vegetable crops in KwaZulu-Natal, Republic of South Africa, were investigated. A 1 067 bp amplicon covering part of the coat protein gene and the 3′ non-translated region (NTR) of three PVYO... -
Identification and distribution of viruses infecting sweet potato (Ipomoea batatas L.) in KwaZulu-Natal province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Benice J Sivparsad --- Discipline of Plant Pathology, School of Agricultural, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Augustine Gubba --- Discipline of Plant Pathology, School of Agricultural, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaA survey to determine occurrence and distribution of viruses infecting sweet potato (Ipomoea batatas (L.) Lam.) was conducted in major sweet potato growing areas in KwaZulu-Natal (KZN), South Africa. Eighty-four symptomatic vine samples were collected and graft-inoculated onto universal indicator... -
Adoption of Agricultural Innovations: The Case of Improved Sweet Potato in Wedza Community of Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shakespear Mudombi --- Institute for Economic Research on Innovation (IERI), Tshwane University of Technology, South AfricaThe smallholder farming sector plays an important role in agricultural production. However this sector is constrained by vulnerability to climatic variations, inadequate access to farming inputs, inappropriate technologies and limited access to markets. There have been concerted efforts by various... -
Phenotypic characterisation of sweetpotato genotypes grown in East and Central Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rukundo Placide --- African Centre for Crop Improvement, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Mark Laing --- African Centre for Crop Improvement, South Africa Daphrose Gahakwa --- Rwanda Agriculture Board, RwandaIdentification of genetic variability and interrelationships among germplasm collections is fundamental to select parents with complementary traits for plant breeding programmes. The aim of this study was to characterise and identify breeding parents among 54 sweetpotato genotypes grown in Rwanda,... -
Agronomic performance of new cream to yellow-orange sweetpotato cultivars in diverse environments across South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sunette M Laurie --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Sidwell S Tjale --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Andre A van den Berg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Musa M Mtileni --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Maryke T Labuschagne --- Department of Plant Sciences, South AfricaSweetpotato is grown in diverse environments of South Africa by both commercial and subsistence farmers. The aim of the present study was to assess the stability, agronomic performance and palatability of new ARC cultivars bred for the informal market, and... -
Assessment of sweetpotato farming systems, production constraints and breeding priorities in eastern Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Stephan Ngailo --- Sugarcane Research Institute, United Republic of Tanzania Hussein A Shimelis --- African Center for Crop Improvement, University of KwaZulu-Natal, South Africa Julia Sibiya --- African Center for Crop Improvement, University of KwaZulu-Natal, South Africa Kiddo Mtunda --- Sugarcane Research Institute, United Republic of TanzaniaSweetpotato is an important food security crop in Tanzania. The crop is grown under diverse farming systems with very low yields. The objective of this study was to assess the present sweetpotato farming systems, farmers’ preferences, production constraints and breeding... -
Nutrient intake, digestibility and rumen fermentation characteristics of sheep fed on selected forage sweet potato cultivars
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: R. Irungu --- Kenya Agricultural and Livestock Research Organization, Kenya P.K. Migwi --- Egerton University, Kenya J.N. Kariuki --- Kenya Agricultural and Livestock Research Organization, Kenya A.Y. Guliye --- Egerton University, Njoro, KenyaSelected forage sweet potato cultivars (Ipomoea batatas Lam) have superior forage characteristics, have high rates of regeneration after harvest, are able to smother weeds and can tolerate diseases and moisture stress. However, little information is documented on their feeding value... -
Phenotypic characterisation of potato (Solanum tuberosum) genotypes in Uganda
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Prossy Namugga --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Julia Sibiya --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Rob Melis --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Alex Barekye --- Kachwekano Zonal Agricultural Research and Development Institute, UgandaIdentification of genetic variation and interrelationships among germplasm collections is essential for parental selection and trait identification among parents for use in breeding programmes. The aim of this study was to characterise 48 potato genotypes to identify suitable parents for... -
Propagation of Hypoxis hemerocallidea by inducing corm buds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Motiki M Mofokeng --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Riana Kleynhans --- Department of Horticulture, South Africa Lesego M Sediane --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Liesl Morey --- Agricultural Research Council–Biometry, Corporate Office, South Africa Hintsa T Araya --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South AfricaAfrican potato is facing rapid decline of wild populations due to large-scale harvesting, necessitating efficient means of propagation. Propagation of African potato is difficult due to seed dormancy and the species does not naturally propagate easily from corms. This study... -
Pre-harvest Curing: Effects on Skin Adhesion, Chemical Composition and Shelf-life of Sweetpotato Roots under Tropical Conditions
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Aditya Parmar --- Department of Agricultural and Biosystems Engineering, Germany Sascha M. Kirchner --- Department of Agricultural and Biosystems Engineering, Germany Barbara Sturm --- Department of Agricultural and Biosystems Engineering, Germany Oliver Hensel --- Department of Agricultural and Biosystems Engineering, GermanyExcoriation (skinning injury) is a serious post-harvest problem for sweetpotato roots. In industrialized countries, sweetpotatoes are exposed to post-harvest curing to facilitate skin toughening and wound healing. However, in developing regions, such a practice is barely undertaken. Pre-harvest curing (PHC),... -
Effect of cultivar and cutting orientation at planting on sweet potato growth and yield in the Verulam area, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zanele Pakkies --- Department of Agriculture, South Africa Corlina M van Jaarsveld --- Department of Agriculture, South Africa Sydney Mavengahama --- Department of Crop Science, School of Agricultural Sciences, Faculty of Agriculture, Science and Technology, South AfricaSweet potato production is affected by agronomical practices such as orientation of cuttings at planting and cultivar selection. Thus a study was conducted to test the effect of two cutting orientations at planting (horizontal and vertical) for four sweet potato... -
Improving productivity of orange-fleshed sweetpotato (Ipomoea batatas) through intercropping with legumes and moderate phosphorus application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Eliah Munda --- International Potato Center, Mozambique Petrus J Pieterse --- Department of Agronomy, South Africa Maria I Andrade --- International Potato Center, Mozambique Godwill S Makunde --- International Potato Center, Mozambique Engil I Pereira --- School of Earth, Environmental, and Marine Sciences, USASweetpotato yield is adversely affected by poor soil fertility in Mozambique where access to inorganic fertilisers is lacking. The objective of the study was to evaluate the effectiveness of intercropping sweetpotato with groundnut and soybean at various phosphorus (P) fertilisation... -
Adoption of dual-purpose sweetpotato varieties under partial population exposure in Rwanda: Insights from an African plant breeding programme
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gideon Danso-Abbeam --- , South Africa Lloyd J.S. Baiyegunhi --- , South Africa Mark D. Laing --- , South Africa Hussein Shimelis --- , South AfricaAs part of the Green Revolution, plant breeding programmes such as the African Centre for Crop Improvement have trained scientists to breed crop varieties in Africa to address the challenges of low productivity. However, exposure to and adoption of these... -
Assessing resistance levels of potato cultivars in South Africa against Alternaria alternata
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Avhurengwi Shirley Mathelemuse --- , Kwasi Sackey Yobo --- , Mariette Truter --- , Philippus Steyn --- , Mapotso Anna Kena --- , Rene Sutherland --- ,Brown leaf spot caused by Alternaria alternata (Fries) Keissler is one of the most devastating fungal diseases of potato. Management of this disease relies mostly on fungicide applications. However, fungicides are becoming less effective due to the development of fungal... -
Yield, nutritional composition, and consumer acceptability of sweetpotato cultivars cultivated with soil amendments in the Middleveld of Eswatini
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Samuel Kofi Tutu --- , Eswatini Henry R Mloza Banda --- , Eswatini Cinisani Tfwala --- , EswatiniUncertainties about the effects of nutrient amendment on the culinary attributes of sweetpotato have limited fertiliser use in Eswatini. The study was carried out at a moist and dry location of Eswatini to investigate the culinary and nutritional attributes of... -
Consumer acceptability of fried chips made from South African sweet potato cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: SM Laurie --- , South Africa WM Mphela --- , South AfricaIn South Africa, the processing of sweet potatoes has a high potential for economic gain, therefore, chips were prepared from six sweet potato cultivars with varying flesh colours for consumer preference evaluation. Scoring was based on colour, crispness, taste and... -
Does vitamin A rich orange-fleshed sweetpotato adoption improve household level diet diversity? Evidence from Ghana and Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Souleimane Adeyemi Adekambi --- University of Parakou (UP), Parakou Julius Juma Okello --- , Uganda Jan Low --- , Kenya Putri Ernawati Abidin --- , Ghana Edward Carey --- , GhanaPromoting the consumption of locally available food crops such as orange-fleshed sweetpotato (OFSP) that are rich in beta carotene, a precursor for vitamin A, has been shown to be a highly effective means of fighting against vitamin A deficiency at... -
Low magnesium content in potato tubers associated with mass loss during storage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R Gericke --- Stellenbosch University, South Africa NJJ Combrink --- Stellenbosch University, South Africa Marieta van der Rijst --- Agricultural Research Council, South AfricaPotatoes are an important crop in the Sandveld and Kouebokkeveld regions of South Africa, and one of the challenges in effective potato production is maintaining quality post-harvest. In order to identify tuber characteristics that may be used to predict keeping... -
Adoption of orange-fleshed sweet potato and technical efficiency nexus in Nigeria: An endogeneity corrected stochastic production frontier approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Adetomiwa Kolapo --- Obafemi Awolowo University, Nigeria Akeem Abiade Tijani --- Obafemi Awolowo University, NigeriaDue to low productivity and lack of essential nutrients like vitamin A in the traditional white and yellow potato, orange-fleshed sweet potato (OFSP) was introduced to the farmers in Nigeria through a programmed tagged Jumpstarting Project. However, empirical data about...