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Articles by V.A. Tenebe
Total Records ( 2 ) for V.A. Tenebe
  G.N. Udom , F.E. Babatunde and V.A. Tenebe
  An experiment was conducted during the 2002 and 2003 cropping seasons on a striga infested field at Bauchi in the Northern Guinea Savannah ecological zone of Nigeria in order to evaluate the effect of some cowpea varieties and planting patterns on striga suppression. Sorghum variety (SAMSORG 14) was grown in mixture with three cowpea varieties (Kano 1696, Yaro da kokari and IT89KD-288) and three planting patterns (alternate ridge, 1:1 and 2:1 sorghum: cowpea combination ratio on same ridge). These treatments were factorially combined in a randomized completely block design and replicated three times. Sorghum intercropped with cowpea variety Kano 1696 in alternate ridge significantly reduced striga density and striga dry matter production. The same factorial combination also gave the highest percent nitrogen (N) in sorghum grain, total N uptake by sorghum, cowpea and the highest contribution of symbiosis to N uptake of sorghum. It could be suggested from this study that any striga control package to be developed for small scale farmers around the study area, should consider intercropping sorghum/cowpea as a central focus. However, screening of more cowpea varieties should be taken into cognizance in order to determine the most suitable variety for reducing striga seed bank.
  N. Voncir , S. Mustapha , V.A. Tenebe , A.L. Kumo and S. Kushwaha
  The content and distribution of extractable zinc within profiles along a toposequence at the Abubakar Tafawa Balewa University, Research Farm Bauchi, Nigeria was studied. Soil samples were collected from each identified horizon of five profile pits dug at the crest, upper slope, middle slope, lower slope and valley bottom positions and subjected to laboratory analysis. The soils were sandy loam at the top and sandy clay loam or clay loam in the subsoil. Clay content was generally higher in the subsoil than in the topsoil with the pH values ranged between 5.98 and 6.18. Organic carbon although generally low was higher in the topsoil than in the subsoil and not markedly different with position along the toposequence while CEC (although generally low 3.28-5.26 cmol kg-1) was higher in the subsoil than in the topsoil. The available phosphorus was also low in all the profiles and not markedly different between the profiles. Available zinc distribution followed the pattern of organic matter distribution and it was also low with no marked difference along the toposequence.
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