scholarly http://ir.library.ui.edu.ng/handle/123456789/456 2026-04-03T20:03:38Z 2026-04-03T20:03:38Z Olaniyi, J. O. Olusoga, S. Babatola, L. A. Atanda, T. T. http://ir.library.ui.edu.ng/handle/123456789/9495 2024-08-30T09:45:01Z 2016-01-01T00:00:00Z

Title: Effects of pre-storage treatments on sprouting and nutritional quality of ginger (zingiberofficinalerosc) rhizomes in different storage periods Authors: Olaniyi, J. O.; Olusoga, S.; Babatola, L. A.; Atanda, T. T. Abstract: Purpose: Ginger rhizomes are highly susceptible to damage during postharvest storage due to soil borne pathogenic disorder. Experiments were conducted to evaluate the effects of prestorage treatments required for sprouting and maintaining the quality of ginger plant in different storage periods at the Teaching and Research Farm, Ladoke Akintola University of Technology, Ogbomoso. Method: The rhizomes were treated with four different pre-storage treatments viz.,control, hydrated lime, - Mancozeb, and 100ml of Trichodermaharzianum solution at different storage periods of one, two and three months. The experiment was arranged in a complete randomized designand laid out in a randomized complete block design with three replicates. Data were collected on percentage sprouting, plant height, number of leaves, leaf area and nutritional quality of ginger rhizomes. Data were subjected to analysis of variance using Statistical Analysis System Software (SAS, 2005). Differences among treatment means were compared using Least Significance Difference (LSD) at 5% probability level. Results: The storage periods significantly (P≤0.05) influenced the percentage sprouting andgrowth parametersof ginger at various sampling period. Highest growth of 9.05cm was recorded from ginger plant stored for three months while the least value of 6.94cm was obtained from rhizomes stored for one month. The pre-storage treatments significantly (P≤0.05) influenced the percentage sprouting, weight loss and growth parameters of ginger at various sampling period. Highest percentage sprouting (94.3%) was recorded from rhizomes treated with 100 ml Trichodermaharzianim solution followed by rhizomes treated with hydrated lime (88.3 %) while lowest percentage sprouting (61.5 %) were recorded from control. Highest percentage weight loss of 46.3% was recorded from control followed by hydrated lime (35.58 %) while the lowest percentage weight loss of 33.93 % was recorded from 100 ml Trichodermaharzianim solution. Conclusions: In conclusion, rhizomes treated with Trichodermaharzianim solution for a period of three months before planting produced better sprouting and enhanced the growth quality of ginger on the field

2016-01-01T00:00:00Z ADETUNJI, I. A. http://ir.library.ui.edu.ng/handle/123456789/4758 2019-09-18T14:12:08Z 1987-08-01T00:00:00Z

Title: SEED PRODUCTION IN OKRA (ABELMOSCHUS ESCULENTUS (L.) MOENCH) Authors: ADETUNJI, I. A. Abstract: Fifteen genotypes of okra were evaluated in eight environments for stability of seed yield, and also to identify the most suitable environments for producing high quality seed at the University of Ibadan, Nigeria from 1984 to 1986. There was significant genotype x environment interactions for all characters examined except for percent seed germination. On the average, highest seed yield and best seed quality as measured by percent seed germination were associated with environments with low total precipitation (460.4 mm), low average relative humidity (50.1%) and high number of sunshine hours (1153.7 hrs). Studies on agronomic requirements for okra seed production revealed that high plant population (111,110 plants/ha) produced about 39% higher seed yields/ha than low plant population of 55,555 plants/ha. Nitrogen levels of 65 kg/ha and 130 kg/ha raised seed yield by 35 and 39% over the control (no nitrogen) respectively. Seeds harvested 35-49 DAF, stored in polythene bags at 4°C with 50% RH retained most of their viability after 16 months of storage. Removing the first two to four edible pods on each plant raised okra seed yields by about three percent. Removal of the first 6 to 14 pods/plant reduced seed yields by 36-80%. Removal of up to four edible pods/ plant was compensated for by higher total pod dry matter yield reflected in a higher 1000-seed weight and larger size of seeds. Seeds in categories of 4.0 and 4.5 mm size grades were more vigorous as indicated by 1000-seed weight, percent seed germination and seedling emergence. Description: A THESIS IN THE DEPARTMENT OF AGRONOMY SUBMITTED TO THE FACULTY OF AGRICULTURE AND FORESTRY IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY OF THE UNIVERSITY OF IBADAN

1987-08-01T00:00:00Z OLUWAYOMBO, OLAWALE OLUFUNMI http://ir.library.ui.edu.ng/handle/123456789/4184 2019-02-06T11:57:21Z 2016-09-01T00:00:00Z

Title: EVALUATION OF MEHLICH - 3 AS A MULTIPURPOSE EXTRACTANT OF PHOSPHORUS AND POTASSIUM USING BELL PEPPER (Capsicum annuum L.) IN SOME NIGERIAN SOILS Authors: OLUWAYOMBO, OLAWALE OLUFUNMI Abstract: Use of single soil specific extractants to determine plant available phosphorus and exchangeable potassium for crops such as bell pepper, are costly, laborious and time wasting. Bell pepper, rich in antioxidants, requires phosphorus and potassium for high quality fruit yield. Mehlich-3 (M3), a multi-purpose extractant could extract phosphorus and potassium simultaneously. However, M3 has not been evaluated and adapted for Nigerian soils. Therefore, M3 as a multi-purpose extractant of P and K from soil for bell pepper was evaluated. Phosphorus and potassium extractions were carried out on soil (0–15 cm) samples from 12 purposively selected sites belonging to eight soil series across three agro-ecological zones (derived savanna, humid forest and northern guinea savanna) of Nigeria. Bray 1 (B1), Bray 2 (B2) and Olsen were used to extract phosphorus; 1M Ammonium acetate pH 7.0 (AAc) was used to extract potassium, while M3, Ammonium hydrogen flouride+DTPA (ABD) and modified M3 (MM3) were used to extract phosphorus and potassium simultaneously. Concentrations of phosphorus and potassium extracted by different extractants were determined using standard procedures. In the screenhouse, pots were filled with 3 kg each of the 12 soil samples and laid in a completely randomised design (n=108). Bell pepper was grown at one plant per pot for four weeks. Phosphorus and potassium uptakes were determined. Field experiment was conducted on Egbeda, Apomu and Jago soil series for three cropping seasons to determine critical range of soil phosphorus and potassium and optimum fertiliser rates using M3. Phosphorus (0, 30, 45 and 60 kg/ha) and potassium (0, 15, 30 and 45 kg/ha) were applied in a split plot arrangement in a randomised complete block design, replicated thrice. Fruit yield of bell pepper was measured. Data were analysed using descriptive statistics, correlation and quadratic regression at α0.05. Phosphorus extracted by B1, B2, Olsen, ABD, MM3 and M3 were 8.34±1.22, 11.19±2.62, 5.11±1.68, 30.33±4.32, 15.68±3.48 and 14.41±4.32 mg/kg, respectively, while potassium extracted by AAc, ABD, MM3 and M3 were 0.47±0.02, 0.21±0.02, 0.36±0.05 and 0.59±0.09 cmol/kg, respectively. Phosphorus and potassium uptakes were 2.34±0.5 and 22.62±2.28 g/kg, respectively. Significant correlations exist between extracted phosphorus and potassium with their uptakes, except ABD for potassium. Correlations of phosphorus and potassium extracted by M3 with their uptakes were the highest (r=0.95), while the lowest was in B1 (0.78) for phosphorus UNIVERSITY OF IBADAN LIBRARY iii and MM3 (0.93) for potassium. The yields (t/ha) of bell pepper across seasons were 15.02±0.51 (Egbeda), 14.19±0.36 (Apomu) and 5.15±0.40 (Jago). Fruit yield was significantly influenced by applied fertilisers with phosphorus lowest in Apomu (r2=0.65) and highest in Jago (r2=0.99), for potassium, the least was in Jago (r2=0.52) and highest in Egbeda (r2=0.99). Critical ranges of phosphorus and potassium in the soils were 15 (Apomu) to 20 (Jago) mg/kg and 0.20 (Apomu) to 0.25 (Jago) cmol/kg, respectively. Optimum phosphorus and potassium concentrations for bell pepper were 45 kg/ha and 30 kg/ha, respectively. Mehlich-3 is a good simultaneous extractant of phosphorus and potassium across the agro-ecological zones. It is therefore recommended for evaluating soil phosphorus and potassium. Keywords: Multipurpose soil extractants; Mehlich-3 extractant; Phosphorus uptake; Bell pepper yield; Word count: 494

2016-09-01T00:00:00Z EDOSOMWAN, LAWRENCE NOSA http://ir.library.ui.edu.ng/handle/123456789/4183 2019-02-06T11:51:11Z 2012-08-01T00:00:00Z

Title: USE OF REMOTE SENSING TECHNIQUE IN THE LANDUSE/LANDCOVER EVALUATION OF DRY RAIN FOREST OF SOUTHWESTERN NIGERIA Authors: EDOSOMWAN, LAWRENCE NOSA Abstract: The dearth of up-to-date information on the Nigerian natural resources is a major hindrance to their optimal and sustainable use for national development. Remote sensing technique enables faster and more accurate acquisition of information than that of conventional approach to natural resources survey. However, their uses are yet to be fully exploited. This study was therefore designed to produce LandUse/LandCover (LULC) maps of Southwestern Nigeria using remote sensing technique and also evaluate soils of the same area for crop production. Multidate maps (1975, 1986 and 2002 of LULC covering 23,629.2 ha for Ife and 13,653 ha for Ilesha areas were derived from aerial photographs of 1975 using mirror stereoscopes and Landsat thematic mapper data for 1986 and 2002. The changes in the LULC were evaluated for built-up, hill/water, fallow/cropland and forest areas. Semi-detailed soil maps of the two areas were produced using aerial photographs and Systeme Probatoire Pour Observation de la Terre (SPOT) Imagery to evaluate the degree of concordance between them. The soil series identified using FAO guidelines were evaluated for potential crop suitability using Land Evaluation Computer (LEC) system. Data were analyzed using descriptive statistics. In LULC of Ife area, there was a general increase of 4.2% (1975 – 1986) and 5.6% (1986 – 2002) in built-up areas; 1.4% (1975 – 1986) and 4.2% (1986 – 2002) in the fallow/crop areas; 0.88% (1975 – 1986) and 3.7% (1986 – 2002) in Hill/Water areas; and a decrease of 3.7% (1975 – 1986) and 5.0% (1986 – 2002) in the forest areas. Concordance between the two soil maps of the area was 32.0%. Thirteen soil series were identified out of which four (Araromi, Itagunmodi, Owena and Egbeda) series were moderately suitable (S2) for maize; seven were moderately suitable (S2) for upland rice (Iregun, Araromi, Itagunmodi, Owena, Olorunda, Oba and Egbeda); eight were moderately suitable (S2) for yam (Okemessi, Erin-Oke, Etionni, Iregun, Araromi, Itagunmodi, Owena and Egbeda) and for cassava five (Iregun, Araromi, Itagunmodi, Owena and Egbeda) were moderately suitable (S2). Similarly in Ilesha area, there was a general increase of 4.0% (1975 – 1986) and 0.3% (1986 – 2002) in the built-up areas; 2.3% (1975 – 1986) and 8.8% (1986 – 2002) in the fallow/crop land areas, 2.1% (1975 – 1986) and 2.6% (1986 – 2002) for Hill/Water areas; and a decrease of 8.4% (1975 – 1986) and 6.5% (1986 – 2002) for forest areas. Concordance between the two soil maps of the area was 54.9%. Fourteen soil series were identified out of which ten were of the same suitability class as those of Ife area. Of the remaining four series (Omo, Jago, Ondo and Irapa), two (Ondo and Jago) were marginally UNIVERSITY OF IBADAN LIBRARY iii suitable (S3) for maize and upland rice. Ondo series was moderately suitable (S2) while Omo and Jago series were marginally suitable (S3) for yam. Three (Omo, Ondo and Jago) soil series were marginally suitable (S3) for cassava while Irapa series was not suitable for any of the crops. Massive forest depletion and conversion of good agricultural lands to urban built-up existed in the area. The soil series identified were of varying degree of suitability in both areas for crop production. Keyword: Landuse/Landcover, Land Evaluation, Fertility capability classification, Remote Sensing.

2012-08-01T00:00:00Z