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Fertilizer is widely used to supply essential nutrients for plant growth and increase yield.
In fact, yields of most crop plants increase linearly with the amount of fertilizer supplied (Loomis and Conner, 2004).
Due to this fact, agricultural sectors strongly depend on fertilization with mineral nutrients.
When crop plants are grown under intensive conditions, substantial amounts of nutrients are removed from the soil (Bala and Giller, 2001).
Thus, to prevent deficiencies, nutrients can be added back to the soil in the form of fertilizers.
Different types of fertilizers are available: inorganic fertilizers, organic fertilizers and bio-fertilizers.
Among these, bio-fertilizers are the products containing living cells of different types of microorganisms which have ability to mobilize nutritionally important elements from non- usable to usable form through biological process (NIIR Board, 2004).
Bekele Baraso Boe is an Agronomist in Coffee production at Sidama Zone.
He was a graduate of the University of Hawassa in Horticulture, obtaining a BSc in 2009 and MSc in 2014.
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