College of Agriculture

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The College of Agriculture is committed to advancing agricultural education, research, and community service. It serves as a center for knowledge creation and dissemination in crop science, animal production, natural resource management, and sustainable agriculture.

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    EFFECT OF NPS AND UREA FERTILIZER RATE ON YIELD AND YIELD COMPONENT OF HEAD CABBAGE (Brassica oleracea L.) AT KOFALE DISTRICT, OROMIA REGIONAL STATE, ETHIOPIA
    (Hawassa University College of Agriculture, 2024) MULUWERK ADDISU
    Cabbage is one of the most popular and widely grown vegetable crops in the world. Among the factors responsible for low yields in cabbage, unbalanced use of N and NPS fertilizer was considered the major problem causing a high reduction in the potential yield of cabbage. Hence, a field experiment was conducted in 2023 main cropping season to investigate the effect of N and NPS fertilizer on growth, yield, and yield components of cabbage in Kofale district. The experiment consisted of a factorial combination of three rates of NPS (0, 100, and 200 kg ha -1 ) and four rates of nitrogen (0, 100, 200, and 300 kg ha-1). The interaction effects of N and NPS fertilizer were found to have a significant impact on days to 50% head initiation, days to 90% head maturity, plant height, leaf length, leaf width, head length, head width, folded number of leaf head diameter, fresh and dry head weight, and marketable head yield. The highest head dry weight (0.174 kg plant -1 ) and marketable 118.34 t ha -1 ) head yields were obtained by 200 kg ha -1 NPS and 300kg ha -1 N rate of fertilizer, which were significantly on par with 100 kg ha -1 NPS and 300 kg ha -1 N rate of fertilizer that recorded 118.01 t ha -1 marketable head yields of cabbage. Therefore, the use of 200 kg ha -1 NPS and 300 kg ha-1 N can tentatively be recommended for cabbage producers in the study area.
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    RESPONSE OF WHEAT (Triticum aestivum L.) TO PHOSPHORUS AND POTASSIUM FERTILIZERS RATES AT KECHI, SOUTH WEST ETHIOPIA
    (Hawassa University College of Agriculture, 2024) ANDUALEM BEZULA
    Wheat is the most significant cereal and staple crop. However, the primary obstacles to output and productivity are the depletion of soil nutrients and the improper application of fertilizers. Therefore, this experiment was conducted at Kechi, South West Ethiopia, to evaluate the growth and yield response of wheat to phosphorus and potassium fertilizer application rates during the 2023 main cropping season. The experiment comprised 12 treatment combinations with four rates of phosphorus (P) (0, 10, 20, and 30 kg/ha) and three rates of potassium (K) (0, 30, and 60 kg/ha) in the form of triple superphosphate (TSP) and murate of potash (KCl), respectively. The experiment was laid out as a randomized complete block design (RCBD) in a factorial arrangement and replicated three times per treatment. Data were collected on crop phenology, growth, yield, and yield components. The collected data were analyzed using statistical analysis software version 9.2.The outcome showed that the primary effects of potassium and phosphorus had a considerable effect on the harvest index and the number of productive tillers. The interaction effect of phosphorus and potassium had a substantial effect on the following parameters: days to heading, days to physiological maturity, plant height, and total tiller number, number of grains per spike, thousand seed weight, aboveground biomass, grain yield, and straw yield. Furthermore, 20 kg/ha P and 30 kg/ha K fertilizer application rates provided the maximum grain production (4350 kg/ha). The economic analysis also indicates that a net benefit of 229,815 ETB/ha and a marginal rate of return of 1783.1% were achieved from 20 kg/ha P and 30 kg/ha K combination. As a result, this combination can be suggested to raise wheat's grain production. However, since this experiment was conducted in a single season and at one site, repeating over seasons and locations will be required to come up with a plausible recommendation.