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• W2004217586 abstract "Soil variability has a profound impact on crop yields in low-input agriculture. The objectives of this study were to examine soil fertility variability and to identify potential soil constraints relating to farmers' conditions for agricultural production in the Sahelian zone of northern Burkina Faso. Surface soil (0-20 cm) and subsoil (20-100 cm) were sampled from 25 pedons on village-scale transects embracing three genetic soil units: two generations of sandy dune soils showing incipient development; a complex unit of clayey pediplain soils with duplex properties showing both alkaline and acid subsoil reaction; and hydromorphic, clayey valley bottom soils. Particle size distribution, pH, electrical conductivity, cation exchange capacity, exchangeable base cations and acidity, soluble base cations, organic carbon, nitrogen, total and available phosphorus, moisture constants, and bulk density were determined. Contents of organic carbon, total nitrogen, total and available phosphorus,and exchangeable potassium are low in all soils and are presumably major constraints.The sodium influenced clayey soils show high absolute variability; properties that vary are subsoil clay (5.8-38.5%), pH (5.8-10.0), cation exchange capacity (4.49-24.81 cmolc kg1), exchangeable sodium percentage (0-26), as well as electrical conductivity, structure, consistency, and available water holding capacity. The sandy soils are homogeneous and not as acid as elsewhere in the Sahel, presumably due to a dust influx. The soil fertility is generally low but highly variable, implying that constraints within production units may consist of multiple com binations of adverse chemical and physical properties, conceptually consistent with the low and variable millet yields. The variability also implies that soil character ization depends on the design of soil sampling, that average values are of doubtful use, that application of chemical fertilizers will produce very different results, and that there is no general scheme for correcting soil fertility. The application of lives tock manure will continue to be the best strategy for sustaining soil productivity." @default.
• W2004217586 created "2016-06-24" @default.
• W2004217586 creator A5070232353 @default.
• W2004217586 date "1999-01-01" @default.
• W2004217586 modified "2023-09-27" @default.
• W2004217586 title "Soil Fertility Variability and Constraints on Village Scale Transects in Northern Burkina Faso" @default.
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• W2004217586 doi "https://doi.org/10.1080/089030699263465" @default.
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