SUMMARYIn order to intensify cassava production in southern Côte d'Ivoire, multiple farmers’ field trials were carried out in two important cassava-producing areas (Dabou and Bingerville). The effectiveness of an Integrated Soil Fertility Management (ISFM) approach as intensification pathway was evaluated for poor sandy soils. Overall, ISFM-based systems outperformed the local cultivation system. The average cassava yield was 14.5 and 6.5 t ha−1 and 12.6 and 5.7 t ha−1 for the ISFM and traditional systems, in Dabou and Bingerville, respectively. The average profitability of ISFM systems was ca. 2500 Euro ha−1, whereby 66% was generated by cowpea intercrop, which yielded on average 3.1 t ha−1. Taking into account the limited farmer's resource endowment and poor soil fertility, ISFM is a crucial component for sustainable intensification of cassava production and poverty alleviate in southern Côte d'Ivoire.

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Aims: This study was aimed to increase the sustainability of smallholder cotton cultivation in Côte d’Ivoire, through the implementation of Integrated Soil Fertility Management, combining the use of moderate amounts of mineral fertilizer and fortified organic manure. Study Design: The experiment was set up in a Fisher block design, with four treatments and three replications. Place and Duration of Study: The trials were conducted in four locations across two largest cotton growing areas (Odienne and Minignan) in the northern agro-ecological zone, between March and September 2021. Methodology: The technical options included: 1) mineral fertilizer (25 kg NPK ha-1 + 12.5 kg urea ha-1) + 0 kg manure ha-1 (control), 2) mineral fertilizer + 50 kg manure ha-1, 3) mineral fertilizer + 75 kg manure ha-1 and 4) local practice (200 kg NPK ha-1 + 50 kg urea ha-1 + 0 kg manure ha-1). Results: The results showed an increase in seed cotton yield for the manure treatments compared to the control treatment. Non-significant yield difference was found between the manure treatments and local practice. The average yields obtained in Odienne were 5.73 ± 0.70 t ha-1 for 75 kg manure ha-1 and 5.13 ± 0.96 for 50 kg manure ha-1, versus 2.58 ± 0.76 t ha-1 for the control treatment. In Minignan, the average yields obtained were 6.86 ± 1.76 t ha-1 for 75 kg manure ha-1 and 5.73 ± 0.70 t ha-1 for 50 kg manure ha-1, versus 2.58 ± 0.76 t ha-1 for the control. The Agronomic Efficiency of applied manure varied from 37.00 ± 13.07 to 73.41 ± 16.89 kg cotton kg-1 and from 44.34 ± 15.05   to 1 for the two agro-ecological zones. Conclusion: The Integrated Soil Fertility Management system was proven to be a promising pathway for achieving sustainable intensification of smallholder cotton cultivation systems.

Aims: In Côte d'Ivoire, as in many other regions of sub-Saharan Africa, the sustainability of agricultural practices has become a crucial challenge to feed a growing human population. The study was aimed to contribute to better targeting of development efforts on sustainable intensification of maize cultivation, through the diagnostics of smallholder farming practices. Study Design: The study was designed as a cross-sectional survey, involving 80 individual farmers, who were selected in four locations (20 per location) according to their involvement in maize cultivation. Place and Duration of Study: The study was conducted in the largest maize production and consumption area in the northern region, between March and September 2022. Methodology: The investigation was focused on the social characteristics of farmers, agronomic characteristics of cultivation systems and on the production constraints. Results: The results showed that the maize growing farmers were natives (98.00%) and men (99,00%), without formal education (74.99%). Maize-based cultivations varied, with a prevalence of intercropping systems (53.16%). It is grown on a land area of 5 to over 11 hectares, with common uses of improved varieties, chemical fertilizers and pesticides. The production is impaired by poor use of agricultural inputs, poor resource endowments of farmers and fluctuating prices, resulting in low yield and profitability (132 to 768 Euro ha-1). Conclusion: Attempts to sustain productivity can be geared towards sound agronomic principles, including implementation of Integrated Pest and Disease Management, minimal tillage and soil mulching, application of manure (legume residues) and moderate fertilizer rates, combined with strengthening farmers’ knowledge and reliable marketing chains.