Effects of total inorganic nitrogen and phosphorus availability on Maize Yields in the First post Tephrosia vogeliifallow

  • C.Z. Mkangwa
  • S.M.S. Maliondo
  • J.M.R. Semoka
Conference paper


A field experiment assessing the effects of natural and T. vogelii fallows and Minjingu phosphate rock (MPR) on total inorganic N, Pi-P and maize grain yield was conducted for 26 months in acidic, N and P deficient Ferralsol. In the first 22 months, natural and T. vogelii fallows were established, with the latter amended with either 0 or 80 kg P ha-1 as MPR at planting. Subsequent to the fallows, maize was planted on plots treated with natural fallow, T. vogelii biomass, T. vogelii biomass co-applied with MPR, T. vogelii biomass pre-applied with MPR at T. vogelii establishment, Sulphate of Ammonia alone or co-applied with either MPR or TSP. Total inorganic N concentrations were monitored at planting and at vegetative and silking maize growth stages, whereas Pi-P was determined once at silkirg. Initially, total inorganic N concentrations were significantly (P ⩽ 0.05) higher in plots amended with T. vogelii biomass, with significantly (P ⩽ 0.05) highest values in plots treated with MPR at establishment of T. vogelii fallows. During vegetative and silking growth stages, total inorganic N concentrations were significantly (P ⩽ 0.05) higher in S/A treated plots. The Pi-P concentrations were significantly (P ⩽ 0.05) increased in plots amended with MPR, TSP and T. vogelii fallow biomass. Maize grain yield was significantly increased by T. vogelii fallow biomass applied alone or co-applied with MPR at maize planting, but significantly (P ⩽ 0.05) highest yield was obtained in plots that were treated with MPR at T. vogelii fallow establishment. Application of MPR to T. vogelii at planting is a better strategy for improvement of total inorganic N, Pi-P and maize grain yield in acidic, N and P deficient Ferralsols


maize grain yield Minjingu phosphate rock Tephrosia vogelii Pi-P total inorganic-N 


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Copyright information

© Springer 2007

Authors and Affiliations

  • C.Z. Mkangwa
    • 1
  • S.M.S. Maliondo
    • 2
  • J.M.R. Semoka
    • 3
  1. 1.Agricultural Research Institute IlongaKilosa
  2. 2.Department of Forest BiologyTanzania
  3. 3.Department of Soil ScienceSokoine University of AgricultureMorogoroTanzania

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