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Optimizing yield and economic returns of rain-fed potato (<i>Solanum tuberosum</i> L.) through water conservation under potato-legume intercropping systems

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dc.contributor.authorGitari, Harun I.
dc.contributor.authorGachene, Charles K. K.
dc.contributor.authorKaranja, Nancy N.
dc.contributor.authorKamau, Solomon
dc.contributor.authorNyawade, Shadrack
dc.contributor.authorSharma, Kalpana
dc.contributor.authorSchulte-Geldermann, Elmar
dc.date.accessioned2024-06-21T09:03:17Z
dc.date.issued2018-09-30
dc.description.abstractEven though potato (Solanum tuberosum L.)-based intercropping systems are widely practised in developing countries, only a few studies have focused on legumes as the companion intercrops. This study was conducted to assess the effect of incorporating legumes into the potato production system on ground cover, soil moisture content (SMC), tuber and legume yield, potato equivalent yield (PEY), gross and net income and benefit: cost ratio (BCR). The treatments comprised of pure potato stand (PS), potato-dolichos (Lablab purpureus L.) (PD), potato-garden pea (Pisum sativum L.) (PG) and potato-bean (Phaseolus vulgaris L.) (PB). Results indicated a significantly higher (69%) ground cover at tuber initiation stage in PD compared to 66% in PG and PB and 56% in PS. Similarly, the highest SMC values were recorded at tuber initiation stage: 230, 207, 201 and 188 mm m−1 in PD, PG, PB and PS, respectively. Fresh tuber yield was highest in PS (36 t ha−1) and PD (35 t ha−1) and lowest in PG (29 t ha−1). PEY was higher under intercropping than monocropping systems. Potato-dolichos was the most profitable intercropping system with a net income of US$ 9174 ha−1 and a BCR of 5.7 compared to PS (US$ 7436 ha−1) with a BCR of 5.1. The study showed that dolichos is a promising legume crop that could be integrated into potato cropping systems to improve CWP without compromising the tuber yield.
dc.description.sponsorshipGerman Federal Ministry for Economic Cooperation and Development (BMZ) The CGIAR Research Program on Roots, Tubers and Bananas (RTB) and the CGIAR Fund Donors.
dc.identifier.citationGitari, H. I., Gachene, C. K., Karanja, N. N., Kamau, S., Nyawade, S., Sharma, K., & Schulte-Geldermann, E. (2018). Optimizing yield and economic returns of rain-fed potato (Solanum tuberosum L.) through water conservation under potato-legume intercropping systems. Agricultural water management, 208, 59-66.
dc.identifier.urihttps://doi.org/10.1016/j.agwat.2018.06.005
dc.identifier.urihttps://repository.nrf.go.ke/handle/123456789/881
dc.language.isoen
dc.publisherElsevier
dc.subjectPotato-legume intercropping systems
dc.subjectPotato equivalent yield
dc.subjectEconomic returns
dc.subjectBenefit: cost ratio
dc.titleOptimizing yield and economic returns of rain-fed potato (<i>Solanum tuberosum</i> L.) through water conservation under potato-legume intercropping systems
dc.typeArticle
dspace.entity.typePublication

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