Narrowing the rice yield gap in East and Southern Africa: Using and adapting existing technologies

Nhamo, Nhamo; Rodenburg, Jonne; Zenna, Negussie; Makombe, Godswill; Luzi-Kihupi, Ashura

doi:10.1016/j.agsy.2014.08.003

Cited by 82 publications

(70 citation statements)

References 84 publications

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“…It was found that such restrictions ranged from being underfunded for acquiring supplies/input to producers lacking knowledge regarding the impact of practices related to their businesses profitability (Nhamo et al, 2014). Another study in the Soviet Union has shown that yield gaps for many crops (i.e.…”

Section: Technological Practices That Explain the Yield Differences Amentioning

confidence: 99%

Technological factors associated with oil palm yield gaps in the Central Region in Colombia

et al. 2017

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Factores tecnológicos asociados a las brechas en el rendimiento en cultivos de palma de aceite de la Zona Central en Colombia Elizabeth Ruiz A. 1 , Eloina Mesa F. 1 , Mauricio Mosquera M. 1 , and Juan Carlos Barrientos F. ABSTRACT RESUMENThis study builds on the results from a previous study (Ruiz, 2017), aimed to identify and quantify yield gaps in a sample of lots from small and medium scale producers, all suppliers of the same mill. The technical staff from the mill provides technical assistance to the aforementioned growers. This study was aimed at identifying what technological factors are associated with such gaps. Regarding the methodological approach, first, it was used the technology balance index (TBI) in order to quantify technology adoption. The TBI allows for rating technology adoption at oil palm crops by considering five processes (which comprehend 25 cropping practices). The processes evaluated are establishment, weeding and pruning, fertilizing, pests control and harvesting. The TBI assigns a category for each practice: high if it is fully adopted, intermediate if it is partially adopted and low if it is not adopted at all. Secondly, in order to determine those practices affecting yield gaps; we used a multiple correspondence analysis (MCA). MCA allowed to synthesize data into two dimensions with 51% of the variability given by the data gathered (qualification of the adoption of 25 crop management practices). Thirdly, we used cluster analysis in order to group lots according to adoption of technology. Then we related the obtained groups with the yield records. MCA results indicated that proper establishment, harvest and nutrition practices are the ones causing most of the variability in terms of technology adoption. The groups resulting from CA, provided evidence that a greater adoption of technology, leads greater yields (i.e. smaller yield gaps).Este estudio se basa en los resultados de un estudio previo (Ruiz, 2017), dirigido a identificar y cuantificar las brechas de rendimiento en una muestra de lotes de productores de palma de aceite de pequeña y mediana escala que son proveedores de la misma planta extractora El personal técnico de la planta proporciona asistencia técnica a los productores antes mencionados. Este estudio tuvo por objetivo identificar cuáles son los factores tecnológicos que están asociados a las brechas en el rendimiento. Con respecto a la metodología, en primer lugar, se utilizó el Índice de Balance Tecnológico (IBT) para cuantificar la adopción de tecnología. El IBT permite valorar la adopción de tecnología en cultivos de palma de aceite considerando cinco procesos (que comprenden 25 prácticas de manejo del cultivo). Los procesos evaluados fueron el establecimiento, desmalezado y poda, fertilización, control de plagas y cosecha. El IBT asigna una categoría para cada práctica: alta si es plenamente adoptada, intermedio si se adopta parcialmente y baja si no se adopta. En segundo lugar, con el fin de determinar las prácticas que se asocian a las brechas de rendimiento, se...

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Section: Technological Practices That Explain the Yield Differences Amentioning

confidence: 99%

Technological factors associated with oil palm yield gaps in the Central Region in Colombia

et al. 2017

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“…phytoremediation, biochar) Participation and training of farmers in development and implementation of improved management systems Access for farmers to modern varieties, fertilizer, and crop protection Access for farmers to local and regional markets Strengthening the rights of smallholder farmers Integrated "Food-Feed-Fuel-Fibre" and "animal-crop-bioenergy" production systems and multi-product use of crops The provision of technical solutions for the improvement of cropping and livestock systems alone will, however, not be sufficient to mobilize the sustainable biomass supply. Farmers must also be willing to adopt these solutions and see an advantage in their application (Nhamo et al 2014). Also, farmers must be able to afford the agricultural inputs required and be in a position to apply them.…”

Section: Box 66: Sustainable Intensification Of Livestock Productionmentioning

confidence: 99%

“…Also, farmers must be able to afford the agricultural inputs required and be in a position to apply them. This calls for support through credit programmes and access for farmers to markets and training programmes (Nhamo et al 2014). …”

Section: Box 66: Sustainable Intensification Of Livestock Productionmentioning

confidence: 99%

Primary Production

et al. 2017

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“…It provides 50% of the calories consumed in several areas of Asia and Africa (Khush, 2005). In numerous African countries, however, rice production is still not sufficient and the estimated rice import in Africa accounts for several millions of tones each year which represent more than one-fourth of its requirements (Nhamo et al, 2014). There is consequently an urgent need to increase rice production, especially considering that the world"s population is predicted to reach around 10 billion people by 2050 (Hoang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Screening for salinity tolerance of Oryza glaberrima Steud. seedlings

Prodjinoto¹,

Gandonou²,

Lutts³

2018

Afr. J. Agric. Res.

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Rice (Oryza sativa) is a salt-sensitive species and improvement of salt resistance is a major goal for plant breeders. Some species of Oryza genus may constitute an interesting source of genes involved in stress resistance for cultivated rice improvement. The African rice Oryza glaberrima is poorly described for its response to salt stress. Twenty-five accessions of O. glaberrima were exposed during 2 weeks to 0 or 60 mM NaCl in nutrient solution. Morphological and physiological parameters were recorded and used to perform principal component analysis allowing us to consider three contrasting groups (saltresistant, medium, and salt-sensitive). Most of the tested lines appeared more salt-sensitive than the moderately salt-resistant cultivar I Kong Pao from O. sativa. Salt-sensitivity index was higher for roots than for shoots and O. glaberrima was poorly efficient for regulation of Na + translocation from the root to the shoot. Some accessions such as TOG5307 however were able to maintain a high net photosynthesis under salt conditions and exhibited a high level of tolerance to accumulated Na + ions and a high capacity for osmotic adjustment. It is concluded that these salt-tolerant accessions constitute a promising material for rice improvement through inter-specific crosses with O. sativa.

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Narrowing the rice yield gap in East and Southern Africa: Using and adapting existing technologies

Cited by 82 publications

References 84 publications

Technological factors associated with oil palm yield gaps in the Central Region in Colombia

Technological factors associated with oil palm yield gaps in the Central Region in Colombia

Primary Production

Screening for salinity tolerance of Oryza glaberrima Steud. seedlings

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