References
[1] CSA (Central Statistical Agency). (2016). Agricultural Sample Survey for the crop season. Report on Area and production Statistical Bulletin 578. FDRE/CSA, A.A, Ethiopia. 5(5), (2016), 80-60.
[2] Elias, E., Okoth, P. F., Smaling, E. M. A. (2019). Explaining bread wheat (Triticum aestivum) yield differences by soil properties and fertilizer rates in the highlands of Ethiopia. Geoderma, 33(9), (2019), 126-133.
[3] Hailu, H., Mamo, T., Keskinen, R., Karltun, E., Gebrekidan, H., Bekele, T. (2015). Soil fertility status and wheat nutrient content in Vertisol cropping systems of central highlands of Ethiopia. Agriculture and Food Security, 4(8), (2015), 19.
[4] Ethio-SIS (Ethiopian Soil Information System). (2016). Soil analysis reports agriculture transformation agency [Unpublished]. Ministry of Agriculture and Agriculture Transformation Agency. 1(1), (2016), 19-30.
[5] Asgelil, D., Taye, B., and Yesuf, A. (2007). The status of Micro-nutrients in Nitisols, Vertisols, Cambisols, and FLuvisolss in major Maize, Wheat, Teff, and Citrus growing areas of Ethiopia. In Proceedings of Agricultural Research Fund. 15(4), (2007), 77-96.
[6] Fageria, N. K. and V. C. Baligar. (2001). Improving nutrient use efficiency of annual crops in Brazilian acid soils for sustainable crop production. Commun. Soil Sci. Plant Anal., 32(9), (2001), 1303-1319.
[7] Singh, J., Bisen, S., Bora, D. K., Kumar, R., Bera, B. (2011). Comparative study of organic, inorganic and integrated plant nutrient supply on the yield of Darjeeling tea and soil health. Field Crop Research, 58: (2011), 58-61.
[8] Van Reeuwijk, Procedures for Soil Analysis FAO, International Soil Reference and Information Center.6700 AJ Wageningen, The Netherlands. (6th Ed) (2002)120.
[9] Walkley, A., Black, I. (1934). An examination of Different methods for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science, 37(1934), 29-37.
[10] Black, C. A. (1965). Methods of soil analysis Am. Soc Agronomy. Madison, Wisconsin, U.S.A. Part 2, (1965), 56-60.
[11] Olsen, S. R. and L. E. Sommers. (1982). Phosphorus. Methods of Soil Analysis, Amer. Soc. Agronomy, Madison, Wisconsin. Part 2. 2nd ed., (1982), 403-429.
[12] Sahlemedhin, S. (1999). Draft guideline for regional soil testing laboratories. NFIA, Addis Ababa Ethiopia. (1999), 78.
[13] McLean, K. O. (1965). Methods of Soils Analysis. Part II. Agronomy. American Society Agronomy. Madison, Wisconsin, USA. No. 9, (1965), 99.
[14] CIMMYT. (1988). From agronomic data to farmer’s recommendations: an economics training manual. Completely revised edition, CIMMYT, Mexico. D.F. (1988) 79 pp.
[15] SAS (Statistical Analysis System Institute). SAS Version 9.4 © 2002-2012. SAS Institute, Inc., Cary, North Carolina, USA.
[16] FAO-WRB (Food and Agriculture Organization of the United Nation) (World Reference Base for Soil Resources). The world reference base for soil resources. World Soil Report Rome. No. 84. (1998) 88.
[17] Sumner, M. E. (2000). Handbook of Soil Science, CRC Press, Boca Raton, FL. (2000) 88.
[18] Tekalign Tadese. (1991). Soil, plant, water, fertilizer, animal manure, and compost analysis. Working Document International Livestock Research Center for Africa, Addis Ababa, Ethiopia. No. 13. (1991), 63.
[19] Don Ackerman, B.S., Richard Large. (2015). The Agronomy Handbook, Midwest Laboratories. (2015), 34.
[20] London, J. R. (1991). Booker tropical soil manual Hand-Book for soil survey and agricultural land evaluation in the tropical and subtropics. Long man scientific and technical, ESSXEX, New York. (1991), p. 474.
[21] Hazelton, P. and B. Murphy. (2007). Interpreting soil test results: What do all the numbers mean. 2nd Edition. CSIRO Publishing. (2007), 152.
[22] Havlin, J. L., Beaton, J. D., Tisdale, S. L., Nelson, W. L. (2005). Soil Fertility and Fertilizers: An Introduction to Nutrient Management. Pearson Prentice Hall, Upper Saddle River, New Jersey.
[23] Prasad, S. (2017). Effect of sowing time and nutrient management on growth and yield of heat-tolerant varieties of wheat [Ph.D. Thesis]. College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya. (2017) 200.
[24] Tahir, M., Tanveer, A., Shah, T., Fiaz, N., and Wasaya, A. (2009). Yield Response of Wheat (Triticum aestivum l.) to Boron Application at Different Growth Stages. Pak. J. Life Soc. Sci., 7: (2009), 39-42.
[25] Fageria, N. K., Baligar, V. C., Jones, C. A. (2011). Growth and Mineral Nutrition of Field Crops. 3rd Edn., Taylor &Francis Group, New York, 52(1), (2011), 530.
[26] Abdo, W. (2009). Effect of different rates of nitrogen fertilizer on yield, yield-related traits and Quality of durum wheat (Triti-cumturgidumL.var durum). M.Sc. Thesis, Haramaya University, Haramaya, Ethiopia. 1(1), (2009), 54-57.
[27] Haftom Gebretsadik, Mitiku Haile, and Yamoah, C. H. Tillage frequency, soil compaction, and N-fertilizer rate effects on yield of tef [Eragrostis tef (Zucc.) Trotter]. Ethiopia. Journal of Science, 1(1): 92009, 82-94.
[28] Bereket Haileselassie, Dawit Habte, Mehretab Haileselassie, and Gebremedhin Gebremeskel. (2014). Effects of Mineral Nitrogen and Phosphorus Fertilizer on Yield and Nutrient Utilization of Bread Wheat (Tritcum aestivum L.) on the Sandy Soils of Hawzen District, Northern Ethiopia. Agriculture, Forestry and Fisheries, 3(3): (2014), 189-198.
[29] Wakjira, T. (2018). Teff Yield Response to NPS Fertilizer and Methods of Sowing in East Shewa, Ethiopia. Journal of Agricultural Sciences, 13(2), (2018), 162-173.
[30] Tekle, L. (2018). Wassie H Response of tef (Eragrostis tef (Zucc.) Trotter) to blended fertilizers in Tembaro, Southern Ethiopia. Journal of Biology, Agriculture, and Healthcare, 8(13), (2018), 34-39.