Girma Et Al

Girma et al

Greener Journal of Agricultural Sciences Vol. 8 (1), pp. 022-029, January 2018.

ISSN: 2276-7770  

Research Article

Manuscript Number: 011818007


(DOI: http://doi.org/10.15580/GJAS.2018.1.011818007)

 

Soil Test Based Phosphorous Calibration for
Fababean (Vicia faba
L.) Production on Nitisols in
Central Highlands of Ethiopian

 

 

*Girma Chala1, Gemechu Keneni2,
Zeleke Obsa2

 

 

Holeta Agriculture Research Centre, EIAR , P.O. Box 31, Holeta, Ethiopia


Abstract

Soil test based phosphorous calibration study was conducted fababean on
Nitisols of farmers’ fields in West Shewa, in central highlands of Ethiopia.
The experiment was arranged in a complete block design with six levels of
phosphorous fertilizer (0, 5, 10, 15, 20 and 25 kg ha-1) with three
replications. Results showed that grain yield of fababean were significantly
affected by P fertilizer application rate. The application of phosphorous
fertilizer at different rates increased grain yield, up to 58% more than the
control. Extractable soil P concentrations (Bray II, 0- 20 cm depth) three
weeks after planting significantly responded to P fertilizer rate. Correlations
of relative yield with Bray-2 soil test phosphorous values showed that the soil
test phosphorous levels greater than 12.5 mg kg-1 (critical
phosphorous concentration) was found to be sufficient for fababean production.
The average phosphorous requirement factor (Pf)calculated from soil
test phosphorous values of all treatments for the study area was 7.02


Keywords: Critical P
concentration, Fababean, Nitisol, Phosphorous calibration, P requirement
factor, Relative yield

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