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SM-CRSP IFS IER

SM-CRSP IFS IER

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SM-CRSP IFS IER

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  1. SM-CRSP IFS IER Development of a Potassium (K) module to be incorporated into Nutrient Management Support System for major West African soils Adama BAGAYOKO

  2. WEST AFRICAN SOILS CONSTRAINTS P and N deficiencies

  3. SM-CRSP Source ADSC UH POTASSIUM (K) DEFICIENCY Preliminary results of Nioro-Senegal

  4. Source LaboSEP IER POTASSIUM (K) DEFICIENCY Preliminary results cotton zone in Mali Figure1. Spatial distribution of exchangeable K in cotton zones in Mali Figure 2. Name of site cotton zones in Mali

  5. HYPOTHESIS The continuous cropping systems, without K fertilization deplete the K reserve of most West African soils. Therefore, K applications on these soils become necessary to increase soil nutrient status and sustain or increase crop yields. SM-CRSP IFS IER

  6. OBJECTIVES • The overall objective is to develop K specific recommendations for key stable food crops in West Africa • Specifics objectives: • To develop and compare a K module to accurately predict K fertilizer requirements, • 2. To determine economic benefit. SM-CRSP IFS IER

  7. METHODOLOGY • Soil collection : Cinzana Landform (Toposequence) SM-CRSP IFS IER Soil label CZ1 CZ2 CZ3 CZ4 • Soil analysis • Incubation CZ5

  8. SM-CRSP IFS IER RESULTS AND DISCUSSION

  9. Malian soils results SM-CRSP IFS IER

  10. Soil pH Cinzana Topsoil SM-CRSP IFS IER

  11. Extractable and Exchangeable K (mg/kg) Cinzana Topsoil SM-CRSP IFS IER

  12. Total and Extractable K (mg/kg) Cinzana Topsoil, Mali SM-CRSP IFS IER

  13. INCUBATION RESULTS SM-CRSP IFS IER

  14. SM-CRSP IFS IER CONCLUSION • Potassium levels are low Future research • K Buffer coefficient • Development of a potassium (K) module

  15. Sponsors THANKS SM-CRSP Soil Management Collaborative Research Support Program TPSS Department of Tropical Plant and Soil Science University Hawaii at Manoa IFS International Foundation for Science, Sweden