REVIEW ON THE EFFECT OF LEVEL OF NITROGEN ON GROWTH AND YIELD OF ONION IN ETHIOPIA | Journal of ..

The onion (Allium cepa L.) is a vegetable that belongs to the Alliaceae family and is the most commonly cultivated plant of the genus Allium. Onion output and productivity are governed by a number of factors. One of the factors that influences onion development is the amount of nitrogen fertiliser used. In this regard, the aim of this review paper was to examine the impact of various nitrogen levels on onion growthand yield. Onions are used for a number of medical purposes. Nitrogen is found in a variety of importantplant compounds.Nitrogen is needed for the formation of chlorophyll, proteins, and is a component of several amino acids and other molecules required for plant growth and other nitrogenous plant components such as nucleic acid and chlorophyll. Nitrogen is also needed for plant carbohydrate utilisation. In addition, results from various climatic regions around the world show that onions react differently to nitrogen application. Onion has a high nitrogen requirement, especially in the early stages of development, as increased the level of N increased the growth trend of the number of leaves, leaf length, and plant body. The use of nitrogen fertiliser increased the amount of nitrogen in the soil, according to different research findings. Onion bulb yield has also increased dramatically.

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