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ISSN: 2360-7874 |
Academic Research Journal of
Agricultural Science and Research |
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Vol. 8(1), pp. 44-52, January 2020 Research Soil-Test Based Phosphorus Fertilizer Recommendation Model for Wheat (Triticum aestivum) in Jamma District of Amhara Region
Abebe Getu and Abreham Teshager
Sirinka Agricultural Research Center, P. O. Box 74, Woldia, Ethiopia Corresponding author: Abebe Getu Asfaw: abegetu3@gmail.com
Accepted 2 December 2019
Soil phosphorus (P) calibration for optimum wheat (Triticum aestivum) yield was conducted by uniformly applying a pre-determined optimum nitrogen fertilizer level of 138 kg ha-1 with 0, 46, 92, 138 and 184 kg P2O5 ha-1 in a randomized complete block design with three replications. Phosphorus fertilizer was applied three weeks before planting and was incubated under the soil. Soil samples from 0-20 cm depth were taken before and after incubation for Olsen’s extractable P analysis. The soil analyses results showed that 13.4 kg P2O5 ha-1 is required to raise the soil test P level by 1 mg kg-1. While, the agronomic data analyses revealed highly significant (P<0.01) differences in the yields of wheat due to application of P fertilizer. The regression analyses of the soil test P after incubation with yield indicated a significant (P<0.05) and strong quadratic (r=0.54) relation between grain yield and soil test P. Accordingly, the critical soil test P (Pc) level based on the Cate-Nelson graphical model was found to be 11.0 mg kg-1. Thus, the equation developed for the P fertilizer recommendation (Pr) for wheat was found to be Pr (kg P2O5 ha-1) = (11.0-Po) x 13.4, where Po is the soil test P level.
Keywords: Cate-Nelson, Jamma, phosphorus fertilizer, Olsen method, Soil test.
How to cite this article (APA Style): Abebe G., Abreham T (2019). Soil-Test Based Phosphorus Fertilizer Recommendation Model for Wheat (Triticum aestivum) in Jamma District of Amhara Region. Acad. Res. J. Agri. Sci. Res. 8(1): 44-52
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