Response of Field Pea (pisum sativum L.) Cultivars to Phosphorus Fertilization on Nitisols: II Field Trials.
2007
Amare Ghizaw and Preez,CC du and Taye Bekele
Phosphorus fertilization experiments were conducted on farms with Nitisols at Ilala and Cheffa that were limed to optimal pH for field pea. A split-plot design was used with three phosphorus fertility levels (low, medium and high) as the main plot treatments and factorial combinations of five phosphorus application rates (0,10,20, 40 and 80 kg ha-1) and two field pea cultivars (G22763-2C and Holetta at lala, and Tegegnech and Cheffa local at Cheffa) as the sub-plot treatments in four replications. At Ilala, the response of field pea to phosphorus fertility levels and application rates as manifested in the grain yield, plant height, aboveground biomass and pods per plant were poor. However, the grain yield of cultivars. Holetta increased and that of cultivars. G22763-2C decreased with increasing phosphorus application rates. There was a significant interaction between phosphorus fertility level and phosphorus application rate with regard to grain yield of field pea. Grain yield increased with increasing phosphorus application rate for the low and medium phosphorus fertility level, but decreased for the high phosphorus level.
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