Journal of Agro-environmental Science最新文献

{"title":"Comparative assessment of selected micronutrients under three different land use systems in Odighi, Edo State, Nigeria","authors":"P. Orobator, E. Ekpenkhio, I. Ugwa","doi":"10.4314/as.v21i3.2","DOIUrl":"https://doi.org/10.4314/as.v21i3.2","url":null,"abstract":"This study carried out a comparative assessment of selected micronutrients under mixed tree plantation, cassava and secondary forest land use systems in Odighi, Edo State, Nigeria. The objectives of the study were to determine the concentrations of selected micronutrients under each of the three land use systems; evaluate the distribution of these micronutrients among the three land use systems; and examine the impact of the three land use systems on the selected micronutrients. Using transect sampling design, 18 soil samples were collected from each of the three land use systems giving a total of 54 soil samples for the study. The cassava land use was 7-10-year-old, mixed tree plantation was 10-15-year-old, while secondary forest was 25-year-old and above. Results showed that the concentrations of the selected soil micronutrients (iron, copper, manganese, and zinc) increased with increasing soil depth in all the examined sites except for manganese under cassava land use. The status of iron and zinc were rated excess while copper and manganese were rated optimum for crop production. The study observed significant (p < 0.05) variations for iron and manganese contents across the examined land uses and concluded that the direction and magnitude of changes in the status of micronutrients were a reflection of long-term impact of the different land uses and soil management measures. Liming of the soil and limited use of nitrogen-containing fertilizers are recommended to ameliorate zinc toxicity in the study area. Also, farmers in collaboration with agriculture extension workers should regulate the usage of organic and inorganic fertilizers as soil treatments to avoid excessive concentrations of iron and zinc in the study area.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78710905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and classification of rice-growing soils on Imo clay shale residua in Eastern Nigeria and current suitability for rice production: II. Anaku and Igbariam communities.","authors":"C. Asadu, C. P. Umeugokwe, F. Eze, C. Asadu, E. Onyeme","doi":"10.4314/as.v21i3.8","DOIUrl":"https://doi.org/10.4314/as.v21i3.8","url":null,"abstract":"The soils on Imo Clay Shale residua were sampled at Anaku and Igbariam in Anambra state, Nigeria to characterize, classify and evaluate their current suitability for rice production following standard scientific procedures. After several auger borings, modal profiles were sited, dug, described, and sampled. The soils generally belong to loamy textural classes or finer, especially in the subsoil layers. The morphological and physical properties of soils showed that the soils were poorly drained, favouring high water retention due to low hydraulic conductivity and slow permeability. All these conditions favour good rice performance. Though the soils contained high levels of exchangeable bases, exchangeable acidity was equally high leading to low base saturation (< 35%). Thus, the soils were classified as Typic Kanhaplaquults (Soil Taxonomy) and correlated to Gleyic Cambisols (World Reference Base for Soil Resources). Due to fertility inadequacies, the current suit- ability unit of the soils for rice production is suitability class 2 with fertility constraints (S2f). This implies that for sustainable rice production supplementary nutrients especially P2O5 from triple superphosphate or rock phosphate need to be applied. Based on the soil chemical results the following recommendations were made for optimum rice production: 100.00-120.00 kg ha‒1 urea, 60.00 kg ha‒1 P2O5 from triple superphosphate and 15.00 kg ha‒1 K2O (muriate of potash).","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79796102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investment decision and level of investment in marketing of value-added products of yam and cassava in Benue State, Nigeria","authors":"A. M. Okeke, A. Salami, F.S. Nkemjika","doi":"10.4314/as.v21i3.9","DOIUrl":"https://doi.org/10.4314/as.v21i3.9","url":null,"abstract":"The supply gap of value-added products of yam and cassava in Nigeria has continued to widen and modeling investment in marketing of these products using Double Hurdle model is non-existence in literature. The study thus investigated factors influencing investment decision and level of investment in the marketing of valueadded products of yam and cassava in Benue State, Nigeria, using Double Hurdle model. Data were collected through structured questionnaire from 300 marketers of value-added products of yam and cassava, selected via multi-stage random sampling technique. The collected data were analyzed using descriptive statistics and Double Hurdle model. The results revealed that marketers of these products in the study area were mostly married females with moderate household size, literate, young, non-member of cooperatives, experienced, and had access to credit with akpu/fufu as the most marketed product among the marketers. Estimates of the Double Hurdle model revealed that sex, marital status, age, and membership of cooperatives were the factors influencing investment decision in the marketing of these products while sex, marital status, level of education, age, membership of cooperatives, return, and credit received were the factors influencing level of investment in the marketing of these products. In identifying factors that significantly influence investment decision and level of investment in the marketing of these products, this study provides an empirical contribution to the existing literature. It was recommended that policies geared towards increasing the level of investment in the marketing of these products should take into consideration the socio-economic characteristics of the marketers.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76536599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Freundlich, Langmuir and Temkin isotherm studies of silicon sorption on soils derived from three parent materials in Edo State, Nigeria","authors":"E. Orhue, A. Emomu","doi":"10.4314/as.v21i3.1","DOIUrl":"https://doi.org/10.4314/as.v21i3.1","url":null,"abstract":"The study was conducted to assess Freundlich, Langmuir, and Temkin isotherm studies of silicon sorption of soils derived from three parent materials in Edo State, Nigeria. A completely randomized design was used to collect fifteen soil samples from five depths in three replications at three locations namely, NIFOR, Uhomora, and Ososo which are developed on Coastal Plain Sand, Imo Shale, and Basement complex rock parent materials respectively. Some soil physical and chemical properties were determined according to standard procedure, in the Faculty of Agriculture laboratory, University of Benin. Samples were equilibrated in 50 ml distilled water containing various amounts of Si as Calcium-Magnesium silicate (CaMgSiO2) to give 50, 100, 200, 400, and 800 mg Si L-1 for 30 min., allowed to stand overnight, equilibrated again for 30 minutes, filtered and Si read colorimetrically. Data obtained were fitted to Freundlich, Langmuir, and Temkin adsorption models. Results showed that the Temkin model expressed Si sorption capacity better considering the R2 values of 0.733, 0.296, and 0.288 for coastal plain sand, Imo shale, and Basement complex rock soils, respectively. The soils formed on Basement complex rock adsorbed more Si than soils formed on Coastal plain sand and Imo shale parent materials, considering the mean Temkin BT (retention capacity of adsorbed Si) values. The Temkin model could be relied upon as a suitable model to determine Si sorption in soils of the study area. ","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89477302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fertility capability classification of selected soils on the basement complex of north-eastern Nigeria","authors":"P. Kefas, L. M. Maniyunda, A.B. Shobayo, Y. Garjila, H. Philip, A. Christopher","doi":"10.4314/as.v21i3.11","DOIUrl":"https://doi.org/10.4314/as.v21i3.11","url":null,"abstract":"A clear understanding of soil characteristics and their appropriate classification are essential for efficient land use and increased productivity. The present study was carried out to obtain the fertility capability classification (FCC) of the soils overlying the basement complex in a toposequence in north eastern Nigeria and to serve as baseline data for soil management. Soils on four topographic positions identified on porphyritic granite (PG), pegmatite (PT) and granite-gneiss (GG) of the basement complex in Taraba State of Nigeria were assessed. Twelve pedons were studied in all, four along the toposequence on PG, PT, and GG. At the type and substrata type, sandy and loamy group dominated. Ustic soil moisture regime, exchange acidity (fixing available phosphorus) and low organic carbon limited the entire soils across the basement complexes restricting rainfed crop production to one season per annum except with irrigation practice. Poor drainage was a limitation across the soils on pegmatite. The FCC rated PG and GG soils as SLdeam (sand over loam and limited by moisture, effective cation exchange capacity, aluminium toxicity and organic carbon) and Ldam (loam type and substrata characteristics limited by moisture, aluminium toxicity and organic carbon), and PT and PT soils as Sdamg (sandy type and substrata type restricted by moisture, aluminium toxicity, organic carbon, drainage). Ridge construction, organic and mineral fertilizer applications are essential management practices required for sustainable use of these soils.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88349048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occupational hazards associated with frozen fish marketing in Abeokuta metropolis in Ogun State, Nigeria","authors":"O. Olaoye, W. G. Ojebiyi, A. O. Akinrinola","doi":"10.4314/as.v21i3.6","DOIUrl":"https://doi.org/10.4314/as.v21i3.6","url":null,"abstract":"This study assessed the occupational hazards and injuries associated with frozen fish marketers in Abeokuta metropolis, Ogun State of Nigeria. A two-stage sampling procedure was adopted in sampling 150 fish marketers from 10 popular markets within the study area. Data were elicited with the aid of an interview schedule and analyzed using descriptive statistics such as frequency distribution, percentage, mean, standard deviation, and Pearson’s Product Moment Correlation (PPMC) analytical tools. Results obtained showed that the mean age of the fish marketers was 37.96±11.04 years, the majority were females (87.9%), married (83.2%), and had a mean household size of 9.00±4.00 persons. Also, 54.4% and 42.3% of the fish marketers had secondary and tertiary education, respectively. In terms of safety measures adopted, all the fish marketers used pain relievers after work, while higher proportions usually use hand gloves (76.5%), wear nose masks (86.6%), wear an apron (80.5%), use plaster in cases of cuts (53.7%) and do regular medical check-up (49.7%). Most (60.4%) of the fish marketers were found to be in good/safe working conditions, while more than half (53.0%) of them were exposed to a high level of hazard. A significant negative relationship existed between working conditions and the level of hazard experienced by the fish marketers (r = –0.721, p ≤ 0.01). It was concluded that occupational hazards are associated with frozen fish marketing. The study recommended that fish marketers should operate from shops to avoid dirty, dusty, and noisy environments to improve their working conditions. ","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79416611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of sand mining on peri-urban agriculture in Ife East and Ife Central Local Government Areas, Osun State, Nigeria.","authors":"F. Awoyelu, R. A. Mebo","doi":"10.4314/as.v21i3.12","DOIUrl":"https://doi.org/10.4314/as.v21i3.12","url":null,"abstract":"There is virtually no information on the effects of artisanal sand mining on peri-urban agriculture in Nigeria in general and Osun State in particular. This study assessed the effects of sand mining on peri-urban agriculture in Ife East and Ife Central Local Government Areas of Osun State during 2015-2019. In effect, the study sought to identify and explain the rate and extent of changes in land uses in the study area, evaluate the level of encroachment of sand mining activities into other land use classifications, and examine socioeconomic factors that determined parting of land for sand mining by landowners in the study area between 2015 and 2019. Data were generated from both primary and secondary sources. Multi-stage sampling technique was used to collect primary data from 60 landowners, 30 cultivators and 30 residents giving a total of 120 respondents using structured questionnaire. Mean ages of landowners, farmers and residents were 67.9 years, 39.6 years and 47.3 years respectively. Majority (68.3%) of landowners had no formal education, while majority (73.3%) and (90%) of farmers and residents had formal education. Majority (68.3%) of landowners were farmers while majority (66.7%) and (76.7%) of farmers and residents were employees of governments. Majority (93.3%) of landowners were males, 100% of farmers were males. Cultivated land area decreased from 48% to 23.2% (–24.8%), built-up area increased from 37.3% to 41.8% (4.5%) while sand-mined area substantially increased from 14.6% to 35% (20.4%). Parting of land for sand mining increased with increasing age, household size and primary occupation being farming while parting of land for sand mining decreased with higher level of education. It is therefore recommended that all levels of government in the country should embark on close monitoring of land use to prevent frequent occurrence of land and environmental degradation. Additionally, Land Use Act of 1978 should be reviewed by bringing all stakeholders together to deliberate on how to prevent multiple land ownership and conflicts.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86005087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and classification of rice-growing soils on Imo clay shale residua in Eastern Nigeria and current suitability for rice production: I. Omasi-Agu and Omor agrarian communities","authors":"C. Asadu, C. P. Umeugokwe, F. Eze, C. Asadu, E. Onyeme","doi":"10.4314/as.v21i3.7","DOIUrl":"https://doi.org/10.4314/as.v21i3.7","url":null,"abstract":"The soils on Imo clay shale residua at Omasi-Agu and Omor areas in Anambra State, Nigeria were sampled in order to characterize classify and evaluate their current suitability for rice production following standard scientific procedures. The soils generally belong to loamy textural classes or finer, especially in the subsoil layers. The morphological and physical properties of soils showed that the soils were poorly drained favouring high water retentivity due to low hydraulic conductivity and slow permeability. All these soil conditions support good rice performance. Though the soils at Omasi-Agu contained high levels of exchangeable bases, exchangeable acidity was equally high leading to low base saturation of < 35% but at Omor the base saturation was > 35%. Thus, the soils were, respectively, classified as Typic Kandiaquults (Soil Taxonomy) correlated with Gleyic Cambisols of the World Reference Base for Soil Resources (WRBSR) and Typic Kandiaqualfs (Soil Taxonomy) correlated with Gleyic Cambisols (WRBSR). Even though the soils of Omor appeared to be generally more fertile than Omasi-Agu soils, both have similar constraints to rice production, that is, insufficiency of nutrients (f) and possibility of erosion by flooding (e) in limited areas (< 25%). Therefore, the current suitability of the soils for rice production is suitability class 2 with fertility constraints (S2fe). For sustainable rice production, supplementary addition of nutrients especially P2O5 from triple superphosphate and some minor levelling and bunding are required to control erosion due to flooding in the limited areas.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"268 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75388548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil properties affecting soil organic carbon stock of different land use types in two agro-ecological zones of Nigeria","authors":"W. Kadiri, K. Ogunleye, A. Fasina, T. Babalola","doi":"10.4314/as.v21i3.5","DOIUrl":"https://doi.org/10.4314/as.v21i3.5","url":null,"abstract":"Soil organic carbon (SOC) stock is the carbon proportion that is of biological origin stored with respect to soil depth. It is more prone to loss than soil inorganic carbon. High sequestration of SOC in soil is germane to the improvement of soil quality and mitigating impact of climate change. Thus, this study was carried out to evaluate soil properties affecting SOC stock in the two agro-ecological zones, namely Upland Rainforest (Ado-Ekiti) and southern Guinea Savanna (Kabba) agro-ecological zones of Nigeria, with respect to three selected land use types; arable, oil palm and wetland. Random collection of soil samples was carried out at four varying depths (0-15, 15-30, 30-45, and 45-60 cm) for evaluation of soil properties. The SOC stock regression models for the two agro-ecological zones showed that land use, SOC, pH, SOM (soil organic matter), Ex-K, Ex-Ca, Ex-Mg (exchangeable potassium, calcium, magnesium, respectively), BD (bulk density), and gravel content would predict variation in SOC stock in the two agro-ecological zones with coefficient of determination (R2) values of 0.952 and 0.996 for Kabba and Ado-Ekiti respectively. Principal component analysis identified that in the soil of the southern Guinea Savanna agro-ecological zone, SOC, CEC, EA, Ex-Na, land use, clay content, and soil depth with Eigenvalues > 1 explained 80.58% of sample variance while in the soil of the Upland Rainforest agro-ecological zone, Ex-Ca, SOC, Ex-Na, EA, sand and silt contents with Eigenvalues > 1 explained 78.81% of sample variance as potential determinants of SOC stock.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"2014 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73988781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal evaluation of yield and yield component traits of thirteen okra genotypes in a derived savannah","authors":"J. I. Enyi, C. Agbo, V. Onyia, U. Chukwudi, E. Okechukwu","doi":"10.4314/as.v21i3.3","DOIUrl":"https://doi.org/10.4314/as.v21i3.3","url":null,"abstract":"Ten improved okra genotypes obtained from National Institute for Horticultural Research and Training, Okigwe, Nigeria and three local cultivars were evaluated under early and late planting seasons of 2014 and 2015. The aim of this study is to estimate the relationship and magnitude of direct effects among the traits as well as determine the degree of heritability and variability among the genotypes. Genotypic stability analysis was also performed on the yield and the two traits most related to yield. ‘Ele Uhie’ genotype had the highest values for most of the parameters measured for both early and late planting seasons. Among the improved genotypes, ‘TAE 38’ had relatively appreciable yield. In both seasons, all the traits studied showed positive and significant (p < 0.01) correlation with total fruit yield, although number of fruits/plant and plant height at maturity had the strongest relationship. The yield stability estimates showed that the genotypes independently expressed their traits in the four different stability groups. Path coefficient analysis revealed that number of fruits/plant and plant height at maturity had higher positive and higher magnitude of direct effect than the direct effects of the associated parameters studied for both planting seasons. Thus, selecting ‘Ele Uhie’, ‘Ele Ogwu’, ‘Ele Ndu’ and ‘TAE 38’ genotypes with relatively stable and high number of fruits/plant and plant height at maturity would have greater impact in sustaining high yields in okra.","PeriodicalId":15011,"journal":{"name":"Journal of Agro-environmental Science","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87053711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}