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Soil moisture management and fertilizer micro-dosing on yield and land utilization efficiency of inter-cropping maize-pigeon-pea in sub humid Tanzania

Author

Listed:
  • Saidia, Paul S.
  • Asch, Folkard
  • Kimaro, Anthony A.
  • Germer, Jorn
  • Kahimba, Frederick C.
  • Graef, Frieder
  • Semoka, Johnson M.R.
  • Rweyemamu, Cornel L.

Abstract

Principally caused by soil water stress and declining soil fertility, low crop productivity results in both food and income insecurity. The effects of nitrogen and phosphorus fertilizer micro-dosing with inter-row rainwater harvesting practices for maize and pigeon-pea inter-cropping on yield and land use efficiency are inadequately documented in sub humid tropics. A field experiment on sandy loam soils in sub humid conditions using a split-split plot design was conducted. Plots used in situ rainwater harvesting practices of tied ridges, open ridges, and flat cultivation. Sub-plots were sole maize, sole pigeon-pea, and 1:1 maize-pigeon pea inter-cropping. The sub-sub plots were control, fertilizer (N and P) application at the micro-dose level, and recommended rates. Tied ridges significantly (p < 0.001) conserved more soil moisture than flat cultivation at 30 cm depth after ten days of rainfall. Ridges increased maize yield by 0.3 t ha−1 over flat cultivation. Fertilizer application significantly (p < 0.001) increased maize yield by 1.12 t ha−1 with micro-dosing and by 1.60 t ha−1 with recommended rates over the control. Combining tied ridges and fertilizer significantly (p < 0.040) increased maize yield by 132–156% compared to flat cultivation without fertilizer. Reflecting a land equivalent ratio, land use efficiency was 67–122% higher in inter-cropping than sole crop. Tied ridges conserved more soil moisture than flat cultivation, enhancing fertilizer use efficiency that improved crop yields and land equivalent ratio under inter-cropping. This strategy could increase food availability and income generation under smallholder farming systems in sub-humid tropic areas.

Suggested Citation

  • Saidia, Paul S. & Asch, Folkard & Kimaro, Anthony A. & Germer, Jorn & Kahimba, Frederick C. & Graef, Frieder & Semoka, Johnson M.R. & Rweyemamu, Cornel L., 2019. "Soil moisture management and fertilizer micro-dosing on yield and land utilization efficiency of inter-cropping maize-pigeon-pea in sub humid Tanzania," Agricultural Water Management, Elsevier, vol. 223(C), pages 1-1.
    • Handle: RePEc:eee:agiwat:v:223:y:2019:i:c:68
    DOI: 10.1016/j.agwat.2019.105712
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    References listed on IDEAS

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    1. Sheahan, Megan & Barrett, Christopher B., 2017. "Ten striking facts about agricultural input use in Sub-Saharan Africa," Food Policy, Elsevier, vol. 67(C), pages 12-25.
    2. Lutengano Mwinuka & Khamaldin Daud Mutabazi & Stefan Sieber & Jeremia Makindara & Jean-Claude Bizimana, 2017. "An economic risk analysis of fertiliser microdosing and rainwater harvesting in a semi-arid farming system in Tanzania," Agrekon, Taylor & Francis Journals, vol. 56(3), pages 274-289, July.
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