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| Musyoka, Martha W.; Adamty, Noah; Muriuki, Anne W.; Cadisch, Georg. |
| Increased per capita food production in the tropics is closely tied to soil organic matter and water management, timely nitrogen (N) supply and crop N use efficiency (NUE) which are influenced by farmingsystems. However, there is lack of data on the effect of organic farming systems on NUE and how thiscompares to conventional farming systems under tropical conditions. Therefore, the objectives of thisstudy were to determine the effect of conventional and organic farming systems at low and high management intensities on N uptake and N use efficiency of potato (Solanum tuberosum L.), maize (Zea mays L.),cabbage (Brassica oleracea var. Capitata), kale (Brassica oleracea var. Acephala) and Swiss chard (Beta vul-garis sub sp. Cicla). The organic high input... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Vegetables; Africa; Root crops. |
| Ano: 2017 |
URL: http://orgprints.org/31473/1/musyoka-etal-2017-EuropeanJourAgri-Vol86-p24-36.pdf |
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| Adamtey, Noah; Musyoka, Martha W.; Zundel, Christine; Cobo, Juan Guillermo; Karanja, Edward; Fiaboe, Komi K.M.; Muriuki, Anne; Mucheru-Muna, Monica; Vanlauwe, Bernard; Berset, Estelle; Messmer, Monika M.; Gattinger, Andreas; Bhullar, Gurbir S.; Cadisch, Georg; Fliessbach, Andreas; Mäder, Paul; Niggli, Urs; Forster, Dionys. |
| In 2007 two long-term trials were established in Kenya to contribute research-based evidence to the global debate on the productivity, economic viability and sustainability of different agricultural production systems. These trials compare conventional (Conv) and organic (Org) farming systems at high and low input levels at two locations, i.e. Chuka, with Humic Nitisols, high inherent soil fertility and rainfall, and Thika, with Rhodic Nitisols with low soil fertility and rainfall. The high input systems (High) represent commercial-scale, export-oriented production that uses the recommended amounts of fertilisers, pesticides and irrigation water to generate high yields, whilst the low input systems (Low) represent local smallholder practices, using... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems Cereals; Pulses and oilseeds Africa. |
| Ano: 2016 |
URL: http://orgprints.org/30697/1/Adamtey-etal-2016-AGEE-Vol235-p61-79.pdf |
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| Musyoka, Martha W.; Adamtey, Noah; Muriuki, Anne W.; Bautze, David; Karanja, Edward N.; Mucheru-Muna, Monica; Fiaboe, Komi K.M.; Cadisch, Georg. |
| Organic farming has been proposed as a solution to foster agricultural sustainability and mitigate the negative environmental impacts of conventional farming. This study assessed N losses and soil surface N balances in conventional and organic farming systems in a sub-humid and semi-humid (Chuka and Thika) sites in Kenya. Nitrate–N (NO3−–N) leached was trapped at 1 m depth using the Self Integrating Accumulator core method and the changes in mineral-N were assessed at different soil depths and different crop growth stages. Both conventional and organic farming systems lost substantial amounts of NO3−–N at the early growth stages of all the crops. Cumulative NO3−–N leached was similar in all the farming systems in each cropping season. More NO3−–N was... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions; Africa. |
| Ano: 2019 |
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| Atandi, Janet G.; Haukeland, Solveig; Kariuki, George M.; Coyne, Danny L.; Karanja, Edward N.; Musyoka, Martha W.; Fiaboe, Komi K.M.; Bautze, David; Adamtey, Noah. |
| Intensification of agriculture, combined with poor agronomic practices have increased the incidence of plant parasitic nematodes (PPN) and other soil pathogens in East Africa, which consequently affects crop productivity in small holder farms. The objective of the study was to assess the effectiveness of farming systems in management of PPN and to recommend the best practice to farmers. Therefore, two field trials were established, one infarmer fieldsandoneon-station,usingmaize (Zeamays L.), intercroppedwithbeans(Phaseolusvulgaris L.) and in rotationwith beans as asole crop. Organic farming(that receivedcompost, Tithonia diversifolia and neem cake (Azadirachta indica)) was compared to conventional farming (that received fertilizer and nematicide), farmer... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection Root crops. |
| Ano: 2017 |
URL: http://orgprints.org/31976/1/Atandi-etal-2017OrganicFarming-and-nematodesAGEE-Vol247-p265-272.pdf |
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| Musyoka, Martha W.; Adamtey, Noah; Bünemann, Else K.; Muriuki, Anne W.; Karanja, Edward N.; Mucheru-Muna, Monica; Fiaboe, Komi K.M.; Cadisch, Georg. |
| To match Nitrogen (N) supply to crop N demand, it is essential to understand N release and uptake patterns in different farming systems and crops. To assesses the dynamics of N released in organic and conventional systems and potential synchrony and asynchrony in crop N uptake, a study was conducted over three cropping seasons (potato, maize and leafy vegetables) at two sites in the Central Highlands of Kenya. Mineral-N release and synchrony were monitored in conventional and organic systems at high (recommended N, P, pesticides and irrigation) and low input (low N, P, pesticide use and rainfed) systems. Mineral-N release was assessed using in situ buried bags and N synchrony was measured by the daily differences in N fluxes. The percentage of N applied... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Composting and manuring; Africa. |
| Ano: 2019 |
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