College of Agriculture & Natural Resources

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College of Agriculture & Natural Resource

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    GROWTH AND YIELD RESPONSE OF COMMON BEAN (Phaseolus vulgaris L.) VARIETIES TO NPSB BLENDED FERTILIZER RATES AT EZHA DISTRICT, SOUTHERN ETHIOPIA
    (WOLKITE UNIVERSITY, 2022-04) DESALEGN KEBEDE ADEBA
    The current average yield of common beans is far less than the national attainable yield in the study area. This is partially due to low soil fertility management and a lack of improved varieties. A field experiment was conducted to evaluate the effect of blended NPSB rates on yield and yield components of common bean varieties, to determine the optimum rate of blended NPSB fertilizer required and the best variety for optimum growth and yield of common bean, and to investigate economically feasible rates of blended NPSB fertilizer for common bean production. The experiment was conducted at Ezha district during 2022 cropping seasons. Treatments consisted of factorial combinations of four common bean varieties (Sab632, Ser119, Ser125, and Bz2) with four NPSB fertilizer rates (0, 50, 100, and 150 kg ha-1) laid out in a randomized complete block design with three replications. Data was collected on growth and yield and yield components and analyzed using SAS (version 9.3). The result showed that NPSB blended fertilizer rate and varieties significantly influenced most of the tested parameters of common bean. The highest days to flowering (51.0), nodule dry weight (3.106), number of pods per plant (17.60), above ground dry biomass (6131.7 kg ha-1), and grain yield (2862.7 kg ha-1) were recorded due to the application of 150 kg of NPSB ha-1 for variety Ser119. The highest days to maturity (99.33) and plant height (83.73cm) were recorded from variety Ser125 with a 150 kg NPSB fertilizer application rate. The maximum number of total nodules (73.67), effective nodules (43.55) and the highest harvest index (48.89%) were recorded from variety Ser119 with a 100 kg ha-1 NPSB fertilizer application rate. With a 150 kg ha-1 NPSB fertilizer application rate, variety Sab632 produced the highest hundred seed weight (42.30). The highest number of seeds per pod (3.76) was recorded from variety Ser125. Net benefit of 81,123.3 birr ha-1 was obtained from the treatment combination of 100 kg NPSB ha-1 application rate for variety Ser119. Thus, based on the study results, the application of 100 kg NPSB ha-1 with variety Ser119 could be recommended to enhance the productivity with the highest net benefits of common bean in the study area. The experiment was done only xii at one location and one season therefore it would have to be replicated across location and season to get best conclusive result and sound full recommendation for specific area in order to assure finding of the current study.
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    GROWTH AND BULB YIELD OF ONION (Allium cepa Var. cepa) VARIETIES IN RESPONSE TO NPSB FERTILIZER AT CHEHA DISTRICT, GURAGE ZONE
    (Wolkite University, 2025-01-30) TESHOME DENBU BIZUNEH
    Onion (Allium cepa L.) is one of the most important vegetable crops commercially grown” “in the world. It is a high value and income generating vegetable crops for most small scale” “farmers and commercial growers in Ethiopia. However, the productivity of onion is low at” “national as well as regional levels; due to various limiting factors such as lack of” “improved varieties and low soil fertility. Accordingly, a field experiment was conducted to” “evaluate growth and yield response of onion varieties to NPSB fertilizer rates at Cheha” “district, Guraghe zone during 2022 cropping season. The experiment was consisted of four” “onion varieties (Bombay Red, Nafid, Nafis and Nasik Red) and four levels of NPSB” “fertilizer (0, 195, 244 and 293 kg ha-1) combined factoriallly and laid out in Randomized” “Complete Block Design with three replications. Yield and yield related parameters were” “recorded and subjected to analysis of variance. The analysis of variance for agronomic” “parameters showed that the main effects; variety and application of NPSB blended” “fertilizer rate were significant for almost all traits. Similarly all yield and yield related” “traits were significantly influenced by the interaction of varieties and NPSB fertilizer rate” “except plant height. The highest values for most of the response variables were recorded” “from variety Nafis combined with NPSB at rate of 293 kg ha-1.The partial budget analysis” “revealed that the highest net benefit 414255(ETB ha-1) with acceptable MRR was obtained” “from the variety Nafis combined with application of 244 kg ha-1 of NPSB fertilizer. Hence,” “the use of Nafis onion variety and application of 244 kgha-1 NPSB fertilizer rate was” “economically feasible and can be recommended for optimum production of onion in the” “study area and other areas having similar agro-ecology. However, as the experiment was” “done for only one season and single location, it has to be repeated over seasons and” “locations to have conclusive recommendation.” “