Abdo W, Bultosa G, Assefa T (2012). Effect of Different Nitrogen Fertilizer Rates on Yield and Yield Related Traits for Seven Durum Wheat Cultivars Grown at Sinana, South Eastern Ethiopia. African Journal of Food, Agriculture, Nutrition and Development 12(3):6079-6094.
Crossref

Abreha K, Heluf G, Tekalign M, Kindie T (2013). Wheat Crop Response to Liming Materials and N and P Fertilizers in Acidic Soils of Tsegede Highlands, Northern Ethiopia. Agriculture, Forestry and Fisheries 2(3):126-135.
Crossref

Adamu M (2013). Farmers' Knowledge Helps Develop Site Specific Fertilizer Rate Recommendations, Central Highlands of Ethiopia. World Applied Sciences Journal 22(4):555-563.

Adiyo Woreda Agricultural and Natural Resource Development Office (AWANRDO) (2017). Annual Report for the year 2017-2018. SheybenchWoreda Agricultural and Natural Resource development Office. Sheybench, Ethiopia.

Amsal T, Tanner DG, Chanyalew M (2000). Agronomic and economic evaluation of the farm N and P response of bread wheat grown on two contrasting soil types in central Ethiopia. The Eleventh Regional Wheat Workshop for Eastern, Central and Southern Africa. CIMMYT. Addis Ababa, Ethiopia. pp. 239-252.

Assefa W (2014). Determination of Optimum N and P Fertilizer Rate for Bread Wheat in Alamata District, Tigray Region, Ethiopia. Alemata Agricultural Research Center. In: Achievements on Integrated Bread Wheat, Soil and Water Management Research, East African Agricultural Productivity Project pp. 16-19.

Assefa W, Yemane N, Dawit H (2015). Planting Density, and Nitrogen and Phosphorus Fertilization Effect on Different Bread Wheat (Triticum aestivum L.) Genotypes in Southern Tigray, Ethiopia. World Journal of Agricultural Science 3(2):20-28.

Balesh T (2005). Integrated Plant Nutrient Management in Crop Production in the Central Ethiopian highlands. PhD Thesis, Norwegian University of Life Sciences, Norway.

Bereket H (2014). Effects of N and P Fertilizers on Yield and Utilization of Nutrient on Bread Wheat on Sandy Soils of Hawzen District, Tigray Region Ethiopia. Mekelle Soil Research Center. In: Achievements on Integrated Bread Wheat, Soil and Water Management Research, East African Agricultural Productivity Project pp. 20-29.

Central Statistical Agency (CSA) (2016). Agricultural Sample Survey 2015/2016 (2008 E.C) Agricultural Sample Survey. Volume I: Report on area and production of major crops (private peasant holdings, Meher season). Statistical Bulletin 584, Addis Ababa.

Central Statistical Authority (CSA) (1995). Agricultural Sample Survey, 1994/95 (1987 EC). Report on Agricultural Practices (Private Peasant Holdings). Main Season. Vol. 111. Statistical Bulletin 132, Addis Ababa.

Central Statistical Authority (CSA) (2014). Statistical Bulletin. Addis Ababa, Ethiopia.

Dawit H, Kassu T, Wubengeda A, Tadesse D (2014). Determination of Optimum N and P Fertilizer Rate for Bread Wheat in the Highland Vertisols of Arsi Zone, Oromia Region Ethiopia. Kulumsa Agricultural Research Center. In: Achievements on Integrated Bread Wheat, Soil and Water Management Research, East African Agricultural Productivity Project pp. 4-15.

Fekremariam A, Yayeh B, Wudu G, Omer B (2015). Response of Bread Wheat to N and P Fertilizer in Wonberema and Debre Elias Districts of Amhara Region, Ethiopia. Adet Agricultural Research Center. In: Achievements on Integrated Bread Wheat, Soil and Water Management Research, East African Agricultural Productivity Project pp. 30-35.

Gete Z, Getachew A, Dejene A, Shahid R (2010). Fertilizer and soil fertility potential in Ethiopia: Constraints and opportunities for enhancing the system. IFPRI, Addis Ababa, Ethiopia 63 p.

Haile D, Nigussie D, Ayana A (2012). Nitrogen use efficiency of bread wheat: Effects of nitrogen rate and time of application. Journal of Soil Science and Plant Nutrition 12(3):389-409.

International maize and wheat improvement center (CIMMYT) (1988). From agronomic data to farmer recommendations: An economics training manual. Completely revised edition. Mexico, D.F. Statistical Bulletin. Addis Ababa, Ethiopia.

Kidane G (2015). Dryland Agriculture Production Systems in Ethiopia. Ethiopian Institute of Agricultural Research: Addis Ababa, Ethiopia. pp. 33-36.

Mann M, Warner J (2015). Ethiopian Wheat Yield and Yield Gap Estimation: A Small Area Integrated Data Approach. Research for Ethiopia's Agricultural Policy, Addis Ababa, Ethiopia.

Minale L, Alemayehu A, Tilahun T, Abreham M (2006). Response of Bread Wheat to Nitrogen and Phosphorous Fertilizers at Different Agroecologies of Northwestern Ethiopia pp. 41-45.

Minot N, Warner J, Lemma S, Kasa L, Gashaw A, Rashid S (2015). The Wheat Supply Chain in Ethiopia: Patterns, trends, and policy options. International Food Policy Research Institute 66 p.

Mojid MA, Wyseure GL, Biswas SK (2011). Requirement of nitrogen, phosphorus and potassium fertilizers for wheat cultivation under irrigation by municipal wastewater. Journal of Soil Science and Plant Nutrition 12(4):655-665.

Power JF, Wiese R, Flowerday D (2000). Managing nitrogen for water quality: Lesson from management systems evaluation area. Journal of Environment 29:335-366.
Crossref

Rahmati H (2009). Effect of plant density and nitrogen rates on yield and nitrogen use efficiency of grain corn. Would Applied Science Journal 7(8):958-961.

Institute (SAS) (2011). SAS Institute Inc., Cary, NC, USA.

Tilahun C, Heluf G, Kibebew K, Tolessa D (2017). Effect of rate and time of nitrogen fertilizer application on durum wheat (Triticum turgidum Var L. Durum) grown on Vertisols of Bale highlands, southeastern Ethiopia. American Journal of Research Communication 5(1):39-56.