June 2011

Evaluation of some locally sourced phosphate rocks for oil palm production

The effectiveness of some locally sourced phosphorus rocks (Sokoto Rock Phosphate (SRP), Crystallizer Super (CRY)) as P2O5 fertilizers for manuring oil palm applied on a long term basis (2000-2008) were evaluated along with conventional imported single superphosphate fertilizer at Okomu Oil Palm Plc., Ovia North East Local Government Area of Edo State, Nigeria.  The rocks...

Author(s): Imogie, A. E., Oviasogie, P. O., Udosen, C. V., Ejedegba, B. O. and Nwawe, A.

June 2011

The integration of variable rate technologies for a soil-applied herbicide in leafy green production

While lettuce is an intensively managed specialty crop for which there is little tolerance for weeds, the herbicide benefin (Balan®) is commonly used in preplant and preemergence applications to control weeds during lettuce stand establishment. In fields with high clay and low organic matter contents, considerably more of the herbicide is required for adequate weed control than in soils with higher sand contents...

Author(s): Kurt D. Nolte

June 2011

Effects of different sources of nitrogen on potato at Tigoni, Kenya

A field experiment was set up to investigate the effects of different sources of nitrogen on potato at Tigoni in Kenya. The treatments consisted of ten fertilizer materials and two potatoSolanum tuberosum varieties, namely, ‘Tigoni’ and ‘Asante’. The experiment was conducted for two consecutive seasons: October, 2008 to February, 2009 (first season) and April, 2009 to August, 2009, (second...

Author(s): Jane Muthoni and Jackson N. Kabira