ir.bowen.edu.ng:8181/jspui/handle/123456789/335 These are articles published in journals by academics staff 2026-05-14T18:57:35Z ir.bowen.edu.ng:8181/jspui/handle/123456789/3088 Title: Growth and yield of tomato (Lycopersicon esculentum Mill) as influenced by poultry manure and NPK fertilizer Authors: Adekiya, A. O.; Agbede, T. M. Abstract: Four field trials were conducted during the years 2006 and 2007 at Owo, the forest savanna transition zone in southwest Nigeria, to study the effect of poultry manure (PM), NPK 15-15-15 fertilizer and NPK 15-15-15 fertilizer + poultry manure on the growth and yield of tomato. Seven treatments were applied to the soil: 0, 10, 20, 30, 40 t ha-1 poultry manure, 300 kg ha-1 NPK 15-15-15 fertilizer and 150 kg ha-1 NPK 15-15-15 fertilizer + 10 t ha-1 poultry manure. These were laid out in a randomized complete block design and replicated three times. The treatments were compared on the basis of their effect on soil chemical properties, leaf nutrient content, growth and yield of tomato. All levels of poultry manure and NPK 15-15-15 fertilizer + poultry manure increased leaf N, P, K, Ca and Mg levels. The soil chemical properties except pH increased with amount of poultry manure. NPK 15-15-15 fertilizer alone did not increase the soil and leaf Ca and Mg. All levels of poultry manure, NPK 15-15-15 fertilizer alone and NPK 15-15-15 fertilizer + poultry manure increased the number of leaves, plant height, leaf area, number of fruits and fruit weight significantly. Among poultry manure levels, 30 t ha-1 poultry manure gave the highest fruit yield. Among the seven treatments, NPK 15-15-15 fertilizer + poultry manure gave the highest yield. On an average over the two years, 10, 20, 30, 40 t ha-1 poultry manure, 300 kg ha-1 NPK 15-15-15 fertilizer alone and 150 kg ha-1 NPK 15-15-15 fertilizer + 10 t ha-1 poultry manure treatments increased fruit weight by 19, 36, 51, 14, 20 and 83%, respectively. Results revealed that poultry manure is a suitable source of nutrients for tomato especially if applied at 30 t ha-1 in the forest-savanna transition zone of southwest Nigeria. The combined use of NPK 15-15-15 fertilizer and poultry manure increased tomato yield compared to the application of NPK 15-15-15 fertilizer or poultry manure alone and is therefore recommended for sustainable productivity. In addition, lesser quantities of poultry manure and NPK 15-15-15 fertilizer would be required, therefore, reducing the amount of money spent on chemical fertilizer. 2009-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/3079 Title: Evaluation of production systems, traditional knowledge of pigeon pea (Cajanus cajan) and risks of extinction of pigeon pea, Jack bean (Canavalia ensiformis) and lubia bean (Lablab purpureus) in some parts of southwest Nigeria Authors: Esan, Vincent Ishola; Ojemola, Oladipupo Ibukun Abstract: Indigenous agricultural knowledge is an important part of the process of making agriculture sustainable. Therefore, the aim of the present study was to i) determine the techniques of pigeon pea production at farmers’ level, ii) investigate the level of extinction of pigeon pea, Jack bean and lubia bean species, ii) assess the distribution and potential of the three minor crops in the study areas. One hundred and fifty respondents were investigated using a structured questionnaire. Direct observation, field visit and focus group discussion were carried out. The survey was conducted in Osun and Oyo States from October to December 2017. Producers mainly grow pigeon pea for its grains for home consumption. Pigeon pea’s leaves were used for medicinal resolutions to treat primarily malaria and fever. Farmers used pigeon pea for soil fertility and to prevent erosion. There is fear that Jack bean and lubia bean species disappear with time, though farmers abandoned Jack bean for a good reason - it becomes poisonous after two years of cultivation, which always leads to death. Conservation strategies can be put in place to avoid the losses of these species for their genetic resources. This study contributes to raise awareness on the risks of losing Jack bean and lubia bean through extinction. In addition, further study needs to be carried out to found out the chemical compound responsible for poisonous seeds of Jack bean after the first harvest. 2018-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/3078 Title: Evaluation of sweet potato (Ipomoea batatas L.) performance and soil properties under tillage methods and poultry manure levels Authors: Agbede, T. M.; Adekiya, A. O. Abstract: Research study on the effect of tillage systems and application rate of poultry manure on sweet potato (Ipomoea batatas) in Alfisol of southwest Nigeria is lacking. Field trials were conducted in 2006, 2007 and 2008 cropping seasons on an Alfisol (Oxic Tropuldalf) at Owo in rainforest zone of southwest Nigeria. The trials consisted of the factorial combinations of two tillage methods (manual clearing and conventional tillage) and four manure levels (0, 5, 10 and 15 t/ha) arranged in a randomized complete block design and replicated three times. Conventional tillage alone (CTo) resulted in lower soil N, P, K, Ca, Mg and soil organic C and better leaf N, P, K, Ca and Mg concentrations, growth and yield of sweet potato compared with manually cleared (MCo) plots. The better performance of sweet potato under conventional tillage (CTo) was adduced to reduced bulk density. Bulk density was negatively correlated with yield. Conventional tillage alone (CTo) improves sweet potato tuber yield by 62, 55 and 42% in 2006, 2007 and 2008, respectively compared with manual clearing alone (MCo). In both the manually cleared and conventionally tilled plots, soil organic C, N, P, K, Ca, Mg and water content increased with amount of poultry manure, while soil pH, bulk density and temperature were reduced. Yields given by 5, 10 and 15 t/ha poultry manure were not significantly different under both manually cleared and conventionally tilled treatments. Conventional tillage plus 5 t/ha poultry manure (CT+5 PM) produced the highest overall yield. Compared with manual clearing alone (MCo) and conventional tillage alone (CTo), conventional tillage plus 5 t/ha poultry manure (CT+5 PM) improved tuber yield of sweet potato by 117 and 43%, respectively. Therefore the use of 5 t/ha poultry manure with conventional tillage is recommended for sweet potato production on an Alfisol of southwest Nigeria. 2011-01-01T00:00:00Z ir.bowen.edu.ng:8181/jspui/handle/123456789/3077 Title: Evaluation of tomato growth and soil properties under methods of seedling bed preparation in an alfisol in the rainforest zone of Southwest Nigeria Authors: Adekiya, A. O.; Ojeniyi, S. O. Abstract: Tillage is expected to influence growth, yield, and nutrient status of the tomato (Lycopersicon esculentum, Mill.) plant, but there is a scarcity of research to investigate the relationship between tillage and performance parameters of tomato. Hence, the variation in soil physical and chemical properties, tomato growth, plant nutrient contents, and fruit yield in response to different tillage methods and seedling bed types and positions, were investigated on an alfisol (Ferric Luvisol) at Akure in the rainforest zone of Nigeria. Different bed types for transplanted tomato seedlings were created using herbicide-based zero tillage, manual clearing (a form of zero tillage), top, side and base positions of ridges and mounds for planting seedlings of early and late season tomato crops. The soil at the top, side and base positions of ridges and mounds had lower bulk densities that was associated with greater root length, plant height, number of stems, branches and number of leaves and weight of tomato fruits, and leaf nutrient contents compared with zero tillage and manually cleared soils. Planting on ridge or mound positions increased the number of fruits and fruit weight by 200 and 100%, respectively, compared with planting on untilled soils. Soil bulk density was negatively correlated with root growth and leaf nutrient content. Tomato requires tillage for optimum productivity. 2002-01-01T00:00:00Z