Browsing by Author "Ogara, I.M."

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    ECONOMIC ANALYSIS OF RATES OF FERTILIZER APPLICATION AND WEED CONTROL METHODS IN SWEET POTATO (Ipomoea Batatas L.) PRODUCTION IN LAFIA, NASARAWA STATE.
    (Department of Agronomy, Nasarawa State University Keffi, 2022-01-05) Bello, I.H.; Ibrahim, Abdullahi Jaji; Ogara, I.M.; Girei, A.A.
    The study was carried out to investigate the profitability of sweet potato production in Lafia under different fertilizer rates application and weed control methods. The research was carried out at Lafia and Agyragu Koro of Nasarawa State. The factors comprised of fertilizer application of two NPK 30 and 60kgha-¹ and 0kgha-¹ of untreated control. The weed control methods comprised of herbicides application of PRE S-metalochlor followed by hoe weeding at 6 WAP, Post emergence application of fluazifop-P-butyl followed by hoe weeding at 6 WAP, hoe weeding at 3 and 6 weeks after planting (WAP) and a weedy check (control), and two plant spacing of 35x75cm row in spacing and 45x75cm row in spacing. Data on tuber yield ha-¹, and cost of inputswere recorded throughout the period of observation at both locations. Higher tuber weight, numbers of leaves and yield was recorded at both locations with the treatment application of 60kgha-¹. The higher yield was recorded with plots treated with Pre emergence application of Smetolachlor followed by hoe weeding at 6 WAP while minimum yield was recorded in the control plots (weedy check). In both locations, the gross margin of the sweet potato increased with the application of fertilizer at the rate of 60 kg ha-1, pre-emergence application of Smetolachlor and planting density of 40 cm intra row spacing.
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    FUNGI ASSOCIATED WITH POSTHARVEST INFECTION OF MELON (EGUSI) SEEDS Citrullus lanatus (THUMBERG) MATSUM & NAKAI, IN NASARAWA STATE, NIGERIA.
    (Department of Agronomy, Nasarawa State University Keffi, 2008-11-11) Ogara, I.M.; Ajayi, Folorunso A.; Ombugadu, J.M.A.
    A study was carried out to determine fungi associated with deterioration of shelled egusi melon sold in markets of Nasarawa State, Nigeria. Six markets where egusi melon are predominatly sold were randomly sampled to evaluate for infection with fungi, on hand and mechanically shelled seeds, showing signs of spoilage. Five retailers were randomly selected in each marketed and from each retailer 170g of seed (one tin can of evaporated milk used as a unit of measure) of both hand and mechanically shelled egusi seeds were purchased. Each sample was screened physically, to assess for spoilage, and categorized into normal, colour loss and stained seeds representing healthy, injured and infected seeds, respectively. Determination of associated fungi was done through culture technique in a completely randomized design replicated five times. Ten fungal species were identified: Aspergillus fumigatus, A. flavus, A. niger, A.sp., Microsporum audoini, M. Sypseum, Phialophora vercucossa, Trichoderma rubrum, Mucor sp. and Penicillium spp. The occurrence of mycotoxin producing fungi Aspergillus flavus and A. fumigatus as well as others, means that care must be taken to maintain quality of Egusi melon seeds as it is very popular and major soup ingredient all over Nigeria. The health implications of these mycotoxin producing agents were also discussed.
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    INFLUENCE OF PHOSPHORUS FERTILIZER ON THE YIELD AND YIELD COMPONENTS OF FOUR SOYBEAN VARIETIES AT LAFIA, SOUTHERN GUINEA SAVANNA OF NIGERIA
    (Department of Agronomy, Nasarawa State University Keffi, 2021-02-02) Jibrin, Mangwa I.; Haruna, I.M.; Ogara, I.M.; Sodah, M.G.
    Field trials were conducted during 2018 and 2019 cropping seasons at the Teaching and Research Farm of the Faculty of Agriculture, Nasarawa State University Keffi, Shabu-Lafia Campus to study the yield performance of soybean varieties under different phosphorus (P) fertilizer levels. The study area fell within the southern Guinea savanna zone of Nigeria, located on latitude 60 150 and 90 300 N and Longitude 60 300 and 110 00E. The treatments consisted of the four P fertilizer levels (0, 13, 26 and 39 kg P2O5 ha-1) and four varieties of soybean (TGX 1448-2E, TGX1987-62F, TGX 1989-19F and TGX 1835-10E). The treatment combinations were laid out in a randomized complete block design (RCBD) and replicated three times. The yield and yield components were significantly (P<0.05) affected by the treatments and each increase in P application resulted in increased number of pods plant-1, number of seeds pod-1, seed yield plant-1, 100 seed weight and seed yield hectare-1 in both cropping seasons. The results also showed that application of 39 kg P2O5 ha-1 produced significantly (P<0.05) highest in all the yield parameters measured while control plots produced lowest in both cropping seasons respectively. The results further revealed that the varietal effect of soybean on all the yield and yield components were significant (P<0.05) with TGX 1987-19F variety produced consistently highest number of pods plant-1, number of seeds pod-1, 100 seed weight and seed yield hectare-1 while TGX 1835-10E variety produced the lowest yield. In view of the results, this study, therefore recommended that soybean farmers in Lafia and its environs should apply P fertilizer at 39 kg P2O5 ha-1 and adopt TGX 1989-19F variety for profitable soybean production.
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    SEED YIELD AND ECONOMIC RETURNS OF SOYBEAN (Glycine max. L. Merill) AS INFLUENCED BY PHOSPHORUS FERTILIZER RATES AND VARIETIES AT LAFIA, NASARAWA STATE
    (Department of Agronomy, Nasarawa State University Keffi, 2021-01-10) Jibrin, Mangwa I.; Haruna, I.M.; Ogara, I.M.; Ibrahim, A.J.; Adamu, M.B.
    Field trials were conducted during the wet seasons of 2018 and 2019 at the Research Farm of Faculty of Agriculture Shabu, Lafia Campus, Nasarawa State University, Keffi, Nigeria (08.33°N and 08.33°E) to study the yield and economic returns of soybean as influenced by phosphorus fertilizer rates and variety. The experiment consisted of four levels of phosphorus in the form of single super phosphate (0, 13, 26 and 39 kg P ha-1) and six varieties of soybean (TGX 1985-10F, TGX 1987-10F, TGX 1448-2E, TGX 1987-62F, TGX 1989-19F and TGX 1835-10E). The twenty four treatment combinations were laid out in a Randomized Complete Block Design (RCBD) with three replications to form seventy two (72) plots. The results of this study showed that each increase in the rate of applied phosphorus significantly (P<0.05) increased seed yield per hectare of soybean in both years. The results also indicated that the application of 39 kg P ha-1 produced significantly (P<0.05) the highest seed yield (kg ha-1) and gross margin of N 147,850 compared to other rates of applied phosphorus. The results further revealed that TGX 1989-19F variety produced significantly (P<0.05) the highest seed yield (kg ha'1) and higher economic returns of soybean compared to other varieties evaluated. In view of the results, this study therefore recommended phosphorus fertilizer at 39 kg ha'1 and TGX 1989-19F variety for higher yield and better economic returns to soybean farmers at Lafia, Nasarawa State.