The corresponding nugget (C0), sill (C0 + partial sill (C)) and range values of the model were used to evaluate spatial distribution of soil variables. National Meteorological Agency (NMA). Houman F Godbold DL Majcherczyk A Wang S Hüttermann A 1991 Can J For Res 21, 1748–1757. Marschner P. Mineral nutrition of higher plants. Our acknowledgements also go to the late Prof. Tekalign Mamo, and we extend our wish that his soul rests peacefully. Soil analysis was conducted in Altic B.V., Dronten, the Netherlands, using Mehlich-3 multi-nutrient soil extraction method at 1:10 (soil–solution ratio) [23]. Landon [35] rated exchangeable Mg as very low (< 0.5), low (0.5–1.5), medium (1.5–3.3), high (3.3–8.3) and very high (> 8.3 Cmol (+) kg−1) levels. In the leaves an antagonism between the levels of K and Ca+Mg was found, this was most extreme in the older leaves. Calcium is hardly ever a problem in soil.… Manure – a technical… Manure is the waste from animals. Behera SK, Shukla AK. Soil exchangeable Mg: a status and b management-based map of Damot Gale, Damot Sore and Sodo Zuria districts. The exchangeable K content of the interpolated map (Fig. Among threshold values, a K–Mg value of 0.7 which is described by Loide [18, 36] was temporarily adopted in this study to demonstrate the potential Mg-induced K deficiency due to the following reasons: Mehlich-3 extraction solution that was used in this study was reported to yield significantly (p < 0.01) and linearly correlated result with DL extraction solution for K (r = 0.955) and AL extraction solution for Mg (r = 0.916) [38]. Laekemariam Fanuel, Kibret Kibebew, Mamo Tekalign, Gebrekidan Heluf. In Vertisols of central highlands of Ethiopia, Hillete et al. Soil fertility status and fertilizer recommendation atlas for Tigray regional state, Ethiopia. Abingdon: Routledge; 2014. Geographical information system (GIS) was employed to randomly assign predefined sampling locations following the Ethiopian Soil Information System (EthioSIS) sample distribution procedure [13]. Soil fertility status and wheat nutrient content in Vertisol cropping systems of central highlands of Ethiopia. Department of Plant Science, College of Agriculture, Wolaita Sodo University, Wolaita Sodo, Ethiopia, School of Natural Resources Management and Environmental Science, Haramaya University, Harar, Ethiopia, Agricultural Transformation Agency (ATA) and International Food Policy Research Institute, Addis Ababa, Ethiopia, You can also search for this author in )’s are the values of the characteristic under study at ith location (i = 1, 2, 3, …, n). Article  Agron Res. This will prevent minerals in rocks, such as feldspar and mica, from releasing potassium into the soil. Generally, the stronger spatial dependence and smaller spatial autocorrelation of K–Mg than soil K and Mg suggest that the concentration of soil Mg is more patchily distributed than K, and hence, perhaps a better indicator of the potential for Mg-induced K deficiency. Bereket H, Tjeerd JS, Ellis H. Teff (Eragrostis tef) production constraints on Vertisols in Ethiopia: farmers’ perceptions and evaluation of low soil zinc as yield-limiting factor. Cambardella CA, Moorman TB, Novak JM, Parkin TB, Karlen DL, Turco RF, Konopka AE. i Crops as enhancers of nutrient use. Ph.D. thesis, Wageningen University and Research Center, Wageningen, The Netherlands. Cite this article. Abayneh E, Demeke T, Ashenafi A. Soils of the mekelle agricultural research center and its testing sites report. Cookies policy. The K–Mg ratio in soils of Damot Gale district varied from 0.2:1 to 1.6:1 where silty loam is the dominant soil texture (data not shown). Ewis E. Omran improving the prediction accuracy of soil mapping through geostatistics. Mitigation of soil acidity and fertility decline challenges for sustainable livelihood improvement: Evidence from southern Region of Ethiopia. 2004;2(1):71–82. Amuyou UA, Eze EB, Essoka PA, Efiong J, Egbai OO. Fertilizer and soil fertility potential in Ethiopia constraints and opportunities for enhancing the system. The finding is against the long belief that soils of the study area and the country contain sufficient quantity of K. The findings of this study imply the need for inclusive approach while assessing the K status of soils and also call for greater attention toward K fertilizer intervention that was not in place in the study area. Potassium, Calcium,Magnesium-How They Relate to Plant Growth by CARL SCHWARTZKOPF, Mid-Continent Agronomist, USGA Green Section Potassium, calcium and magnesium play an important role in soil-plant relationships. PubMed Google Scholar. - 185.43.44.104. Ph.D. dissertation. Proceedings of national conference sustainable land management poverty alleviation, co-organized by environmental economics and policy forum for Ethiopia at Ethiopian Development Research Institute, Sustainable Land Use Forum (SLUF). Sulfate potash magnesia (or Sul-Po-Mag) is essentially a mixture of potassium sulfate and kieserite containing about 20% potassium and 11% magnesium per volume. Marschner H 1983 Mineral nutrition of higher plants. To reduce the potential for cross-sample contamination, the soil auger and other sampling tools were cleaned before taking the next sample. Hailesilassie College of Agriculture, Oklahoma State University. Agriculture & Food Security Overall, 21% of total samples were under strongly acidic reaction.

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