This chapter describes the general agricultural context of Burkina Faso, the characteristics of the agroecological zones, the soil types, and the main cropping. It addresses fertilizer use optimization in Burkina Faso and factors that affect profitability of fertilizer use. Computer-run and paper-based decision tools are introduced for optimizing fertilizer use giving choices expected to maximize profit to fertilizer use. Also, a tool for adjusting fertilizer rates according to practices such as manure use and according to soil test information is provided. A comparison is made of current fertilizer rate recommendations with the rates that are expected to maximize net returns per hectare due to fertilizer use, called in this chapter the economically optimal rates of nutrient application.
RESUMELa baisse de la fertilité des sols agit fortement sur la productivité des cultures et par conséquent, le revenu des agriculteurs. L'utilisation des engrais minéraux permet d'améliorer la productivité des sols mais son accès reste limité aux petits producteurs. L'objectif de la présente étude est d'évaluer l'efficacité agronomique et économique de la microdose selon la toposéquence. Des tests ont été implantés suivant la toposéquence pendant deux ans et des enquêtes ont été menées auprès des ménages pour évaluer la rentabilité de la technologie. Effects of fertilizer microdosing on cowpea, millet and sorghum production as a function of the toposequence ABSTRACT The decline in soil fertility has a strong effect on crop productivity and, consequently, on farmers' incomes. The use of mineral fertilizers improves soil productivity, but access is limited to small-scale producers. The objective of this study was to evaluate the agronomic and economic efficiency of the microdose according to the toposequence. Tests were carried out following the toposequence during two cropping seasons and household surveys were conducted to assess the cost-effectiveness of the technology. NPK (14-23-14) fertilizer was applied on cowpea and sorghum at a rate of 2 g / pit and 3 g /pit for millet pocket (62.5 kg/ha). Urea was applied only on sorghum and millet respectively at a rate of 1 g/pit (31.25 kg/ha) and 1.5 g/pit (46.88 kg/ha). These treatments were compared with the recommended fertilizer rate and an absolute control. Microdose increased grain yields by 143%, 134%, and 155% respectively for sorghum, millet and cowpea compared with the control. Microdose was economically more profitable than the recommended fertilizer rate.
http://indexmedicus.afro.who.int Effets à court terme de l'application des fientes de volaille sur le rendement du maïs (Zea mays L.) et les caractéristiques chimiques d'un sol ferralitique dans la zone sud-soudanienne du Burkina Faso
With the aim of promoting sustainable agriculture that respects the environment and human health, a study was carried out to evaluate the impact of organic and mineral fertilizers on tomato plant cultivation. The study was carried out at the Research Station of Farako-Bâ in Burkina Faso. A complete randomized block of Fisher design with four replications was used to carry out the experiment. The treatments were as follows: T0: control (compost 15 t/ha); T1: compost (15 t/ha) + biosol (160 kg/ha) + urea (35 kg/ha) + NPK (87.5 kg/ha) + KCl (52.5 kg/ha); T2: compost (15 t/ha) + neem seed cake (10 t/ha) + urea (100 kg/ha) + NPK (250 kg/ha) + KCl (150 kg/ha); T3: compost (15 t/ha) + biochar (10 t/ha) + urea (100 kg/ha) + NPK (250 kg/ha) + KCl (150 kg/ha). The data collected were collar diameter, height of plants, number of fruits, fruit diameter, and tomato fruit yield. The results showed that the combination organo-mineral fertilizers had a significant effect on tomato plant productivity. Application of neem seed cake and mineral fertilizers was the most efficient treatment with a yield increase of 53% and 40% in 2019, respectively. In 2020, the yield increase was 32 and 85% for biochar and biosol, respectively. Incorporation of organo-mineral fertilizers has improved soil organic and nutrient status, which ultimately promotes crop growth of tomato plant. Neem cake can be effectively used to increase tomato plant productivity and farmer's income and also maintain soil fertility.
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