Abstract
Cabbage is belongs to the family cruciferae and it is biennial crop with a very short stem supporting a mass of overlapping leaves to from a compact head. Ethiopia has a variety of vegetable crops grown in different agro- ecological zones by small farmers, mainly as a source of income and food. Commercial producers are also involved in the production, processing and marketing of vegetable. For this reason, it poses the most difficult problem in making fertilizer recommendations. Plant demand for nitrogen can be satisfied from a combination of soil and fertilizer to ensure optimum growth and yield of cabbage. The major essential plant nutrient nitrogen was found increasing in short supply in the soils. Nitrogen is required in much greater quantities than most other nutrients. It is an important component of proteins, enzymes and vitamins in plants, and is a central part of the essential photosynthetic molecules; chlorophyll. Plant demand for nitrogen can be satisfied from a combination of soil and fertilizer nitrogen to ensure optimum growth. Thus, it requires applying of appropriate rate of fertilizer for the enhanced cabbage productivity and sustainable yield. Many reviews on show that nitrogen application increases the total yield of cabbage also enhance. But this is possible as long as it is managed properly in terms of rate and time of application. Nitrogen levels have to be regulated to obtain high yield from cabbage. Hence, review on the further investigation need to be done up to the yield and extra year to come up comprehensive recommendation of optimum nitrogen application for the successful production of cabbage.
Highlights
Cabbage can grow under wide range of environmental condition in both temperate and tropical, but cool moist climate is most suitable [21]
Ethiopia has a variety of vegetable crops grown in different agro- ecological zones by small farmers, mainly as a source of income and food
Commercial producers are involved in the production, processing and marketing of vegetable [32]
Summary
Cabbage can grow under wide range of environmental condition in both temperate and tropical, but cool moist climate is most suitable [21]. Area, production and yield of head cabbage in Ethiopia 2007/2008 were 1989 hectares, 11,765 tons and 5.9 t/ha respectively. It is significant to note that nitrogen response is directly associated to the soil type, emphasizing that soil varying in fertility status react differentially to the applied fertilizer [7] It requires applying of appropriate rate of fertilizer for the enhanced cabbage productivity and to have good vegetative growth for sustainable yield. Many experiments show that nitrogen application increases the total yield of cabbage possible when managed properly in terms of rate and time of application [31] Due to this they unable to maximize their income and improve livelihood. Cabbage has been domesticated and used for human consumption since the earliest antiquity [26]
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