Soil properties and yam yield under different tillage systems in a tropical Alfisol

Agbede, Taiwo Michael; Adekiya, Aruna Olasekan

doi:10.1080/03650340.2011.652096

Cited by 7 publications

(6 citation statements)

References 9 publications

(9 reference statements)

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“…e observed yield trend suggests that the yield of white yam decreased by 10% in the second year, whereas that of yellow yam decreased by about 12%. In another study on white yam in the same soil type in Nigeria, Agbede et al [50] observed a 5% decline in tuber yield in the second and third years of continuous cultivation. is was attributed to a reduction in SOM content as one year of growing D. rotundata already reduced the soil organic carbon content by 50% [60].…”

Section: Native Fertilitymentioning

confidence: 91%

“…Yam mounds and ridges produced superior effects on both tuber length and weight compared to zero tillage and manual land clearing. Among the tillage practices conducted on a Luvisol (i.e., zero tillage; manual ridging; manual mounding; ploughing + harrowing; ploughing + harrowing + ridging), Agbede and Adekiya [50] found higher tuber yields under ploughing + harrowing + ridging three consecutive years.…”

Section: Tillagementioning

confidence: 99%

“…Sadly, none of the studies consulted produced such yields except for D. alata which produced ≥ 50 t ha −1 in a forest soil of Côte d'Ivoire under native soil fertility and mineral fertilizer applications [31,61]. Generally, yam yields are influenced by climatic conditions, site and soil properties, tillage method used, year of cultivation (i.e., first and subsequent cultivation), and species [23,24,31,50,52,61,71,75]. For instance, D. alata is the highest yielding yam species producing at least twice the yield of other species [31,63,71,76] followed by D. rotundata and D. cayenensis [52] irrespective of the ecological zone and soil fertility.…”

Section: Yam Yields In the Yam Beltmentioning

confidence: 99%

“…Ultimately, soil fertility is often cited as the most important contributor of yam yield gaps in the yam belt [25,31,61,71], particularly in low-input traditional system of yam cultivation [11]. Previous studies on yam production found physical soil properties such as bulk density, soil moisture, and temperature to account for 66% of yam tuber yields [50]. In a review of factors explaining yield gaps, soil fertility alone explained 69% of the yield gap records assessed, whereas soil type explained 58% [79].…”

Section: E Future Of Yam Productionmentioning

confidence: 99%

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Ecological and Edaphic Drivers of Yam Production in West Africa

Neina

2021

Applied and Environmental Soil Science

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Yam is an important food and cash crop in West Africa (the yam belt) whose production is traditionally nonsedentary due to its substantial nutrient demand. Population growth, urbanization, and existing soil degradation have made nonsedentary farming virtually impossible. Despite the numerous research invested in yam production within and outside the yam belt, some gaps remain to be filled owing to changing climate events and global developments. Alarmingly, the yam belt is facing sharp yield declines despite increasing production areas. The key edaphic and ecological drivers of yam production in the global yam belt were reviewed. The implications for yam production were discussed along with prospects for future research, sustainable production, and soil management. The main findings are that (1) agroecological zone, postplanting cultural practices, and climate change and variability ecological drivers, while (2) tillage, soil type, texture, and fertility were the edaphic factors. The most critical among the drivers, principally, soil fertility, entails the biological and chemical through which nutrients are released lude, and physical soil fertility which enhances low bulk density, porosity, and water retention for free yam tuber expansion. Soil fertility was the most cited driver, which explains why yam is often the first crop in the cropland cultivation cycle in the yam belt. Data show that yam yields decline with time under native fertility and mineral fertilizer application due to the voracious nutrient extraction by tubers. Conversely, yields increase chronologically under organic fertilizer application due to the additive effects of the latter on soil properties. Thus, a yam fertilizer program to develop specific yam fertilizer formulations and the adoption of the Terra Preta Model are proposed to sustain future yam production.

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Section: Native Fertilitymentioning

confidence: 91%

Section: Tillagementioning

confidence: 99%

Section: Yam Yields In the Yam Beltmentioning

confidence: 99%

Section: E Future Of Yam Productionmentioning

confidence: 99%

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Ecological and Edaphic Drivers of Yam Production in West Africa

Neina

2021

Applied and Environmental Soil Science

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“…Except from one work showing an increase of D. rotundata tuber yield following urine input (Comoé et al, 2009 ), no other publication was found on the effect of waste recycling on yam. Finally, Agbede ( 2006 ) and Agbede and Adekiya ( 2013 ) show that mounding or ridging lead to higher tuber yields than no-till and that soil apparent density is negatively correlated to tuber yield.…”

Section: Importance Of Soil Fertility For Yam Productionmentioning

confidence: 98%

The Challenge of Improving Soil Fertility in Yam Cropping Systems of West Africa

Frossard

Aighewi²,

Aké

et al. 2017

Front. Plant Sci.

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Yam (Dioscorea spp.) is a tuber crop grown for food security, income generation, and traditional medicine. This crop has a high cultural value for some of the groups growing it. Most of the production comes from West Africa where the increased demand has been covered by enlarging cultivated surfaces while the mean yield remained around 10 t tuber ha−1. In West Africa, yam is traditionally cultivated without input as the first crop after a long-term fallow as it is considered to require a high soil fertility. African soils, however, are being more and more degraded. The aims of this review were to show the importance of soil fertility for yam, discuss barriers that might limit the adoption of integrated soil fertility management (ISFM) in yam-based systems in West Africa, present the concept of innovation platforms (IPs) as a tool to foster collaboration between actors for designing innovations in yam-based systems and provide recommendations for future research. This review shows that the development of sustainable, feasible, and acceptable soil management innovations for yam requires research to be conducted in interdisciplinary teams including natural and social sciences and in a transdisciplinary manner involving relevant actors from the problem definition, to the co-design of soil management innovations, the evaluation of research results, their communication and their implementation. Finally, this research should be conducted in diverse biophysical and socio-economic settings to develop generic rules on soil/plant relationships in yam as affected by soil management and on how to adjust the innovation supply to specific contexts.

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