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dc.descriptionGedruckte Ausg. im Verlag Kassel Univ. Press ( erschienen.ger
dc.publisherKassel University Press
dc.rightsUrheberrechtlich geschützt
dc.subjectPearl millet early growtheng
dc.subjectseedball technologyeng
dc.subjectlocal resourceseng
dc.subjectdry sowingeng
dc.subjectseedling emergenceeng
dc.subjectsubsistence farmingeng
dc.subjectsmallholder farmereng
dc.subjectcheap seed pelleting techniqueeng
dc.titlePhysical and chemical optimisation of the seedball technology addressing pearl millet under Sahelian conditionseng
dcterms.abstractThis study deals with the development of the seedball technology in particular for dry sowing under Sahelian conditions and pearl millet as crop. At first, our participatory evaluation in Senegal showed that (i) local materials needed for seedball production are locally available, (ii) the technology conforms to the existing management systems in the Sahel, and (iii) socio-economic conditions do not hinder seedball adoption. Afterwards, seedball was mechanically and chemically optimised. Pearl millet seedlings derived from the seedball variants were grown and compared to the control under greenhouse conditions. Our results showed that the combination of 80 g sand + 50 g loam + 25 ml water is the standard seedball dough, which produces about ten 2 cm diameter-sized seedballs. Either 1 g NPK fertiliser or 3 g wood ash can be added as nutrient additive to enhance early biomass of pearl millet seedlings. Ammonium fertiliser, urea and gum arabic as seedball components hampered seedlings emergence. Seedball + 3 g wood ash and seedball + 1 g NPK-treatments enhanced shoot biomass by 60 % and 75 %, root biomass by 36 % and 94 %, and root length density by 14 % and 28 %, respectively, relative to the control. Shoot nutrient content was not greatly influenced by treatment. However, multiplying biomass yield with nutrient content indicates that nutrient extraction was higher in nutrient-amended seedballs. On-station field tests in Senegal showed over 95 % emergence under real Sahelian conditions. Since early seedlings enhancement is decisive for pearl millet panicle yield under the Sahelian conditions, on-farm trials in the Sahel are recommended.eng
dcterms.accessRightsopen access
dcterms.creatorNwankwo, Charles Ikenna
dcterms.creatorMühlena, Jan
dcterms.creatorBiegert, Konni
dcterms.creatorButzer, Diana
dcterms.creatorNeumann, Günter
dcterms.creatorSy, Ousmane
dcterms.creatorHerrmann, Ludger
dcterms.source.issueNo. 2
dcterms.source.journalJournal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)eng
dcterms.source.volumeVol. 119

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