Soil fertility enhancement through conservation agriculture with trees (CAWT) in the arid and semi-arid lands of Eastern Kenya
March 2024
Arid and semi-arid lands (ASALs) are prone to relatively high vegetation and general environmental degradation including soils. Conservation agriculture with trees presents an opportunity to reduce such degradation and enhance soil characteristics-therefore redressing dryland challenges of low productivity- despite its low adoption. The study assessed the soil physical and chemical properties differences for...
Response of rainfall variability on the evolution of the vegetative cycle in the Chari-Logone basin (Lake Chad basin)
November 2023
The Chari-Logone Basin (CLB), encompassing 610,000 km2 as the hydrologically active segment of the Lake Chad basin, is the focal point of this study aiming to characterize the evolution of vegetation cover in response to rainfall. The primary focus relies on spatialized precipitation and NDVI data. Analysis of these spatial rainfall data reveals trends that predominantly align with a south-north gradient typical of the...
Land suitability evaluation for rainfed maize production using geospatial technologies in Nzara and Yambio counties, South Sudan
October 2023
Classifying land based on its suitability for agriculture is crucial for agricultural development and future planning for food production. In this context, a land suitability assessment for rainfed maize varieties was conducted in Sakure and Nginda Payams of Nzara and Yambio counties, covering an area of 47,500 ha. The purpose of this assessment was to create a semi-detailed land suitability map (scale 1:100,000) using...
Nutrient uptake and use efficiencies of strip intercropped cassava, maize and pepper as affected by fertilizer type and age of oil palm fields in an oil palm-based intercropping system
April 2022
Field trials were conducted to examine the responses of Cassava, Maize and Pepper to fertilizers in the alleys of 3, 4 and 6 years oil palm fields. Fertilizers: NPK (1.44 kg/plot), Ferti Plus (9.68 kg/plot) and poultry manure (6.17 kg/plot) were applied two weeks after planting. Results showed that fertilizers significantly influenced N uptake and some indicators of N use efficiencies measured. NPK enhanced...
Verification of nutrients standards for diagnosis of Yuhebao lychee (Litchi chinensis Sonn.)
February 2022
The steady production of Yuhebao lychee (Litchi chinensis Sonn.) is involved in accurate fertilization management. The critical period of nutrient requirement for Yuhebao lychee is during January to June every year in Taiwan because the period is from flowering to fruiting stage. It would serve the references of fertilization if there is an accurate standard for nutrient management of Yuhebao lychee. This study was...
Effects of irrigation levels and nitrogen fertilizer rate on grain yield of wheat (Triticum aestivum) at Amibara, Middle Awash, Ethiopia
February 2022
For three years, the response of wheat grain yield to varying amounts of nitrogen fertilizer and different levels of irrigation was investigated. Three levels of irrigation (100, 75, and 50%ETc) and five nitrogen rates (0, 23, 46, 69, and 92 kg/ha) were used in a split plot design. Irrigation and nitrogen levels both had a considerable impact on wheat grain yield, but there was no interaction between the two. The...
Phosphate leachate losses in sandy soil amended with different fertilizers and effects on cowpea yield
February 2022
Nutrient leaching limits sustainable fertility management of tropical sandy soils. Therefore, phosphate leached from NPK 15:15:15 (NPK), sole compost (SC), phospho-compost (PC), poultry manure (PM), fresh Gliricidia sepium leaves (GL) and integrated (INTG) fertilizers applied at 40 kgP2O5 ha-1 and an unamended soil (AC) in leaching columns containing 2.5 kg soil were studied. Each soil was simulated for leaching at 2,...
Sustained nutrient delivery system: A new perspective in bioremediation
November 2021
Crude oil induced pollution on soil environment is an increasing trend due to incessant accidental release of this component into the environment. Bioremediation which is considered the most effective clean-up tool is faced with the challenge of sustained nutrient delivery to enhance and sustain the activities of oleophilic microbes. Slow release fertilizer (SRF) is a purposely designed system that releases nutrients in...
Impact of emissions from brick industries on soil properties, agricultural crops and homegardens in Chittagong, Bangladesh
November 2021
This study was conducted in the Chittagong district of Bangladesh to explore the impact of emissions from brick kilns on crop yields from agricultural lands which were located at distances of 100, 101-500, 501-1000, and 1001-2000 m from brick kilns. The survey was conducted by using a semi-structured questionnaire during the period from January to March 2019. It also included soil sampling on farmlands located at...
Characterization of soils of Jello Chancho Watershed: The case of Liban District, East Shewa Zone Ethiopia
October 2021
Understanding of soil-physicochemical properties is necessary for appropriate utilization of soil resources. Soil resources characterization and classification are major requirements. In view of this, a study was conducted on soils of Jello-Chancho Watershed to characterize physicochemical properties of the soil. To achieve these objectives, three profiles were opened from the watershed and examined for their selected...
Sewage sludge and NPK Application to enhance growth, yield and quality of kale and spinach crops
October 2021
Sewage sludge is considered as a valuable supplement because of its high organic matter, macro and micro nutrients. Its application has been studied in combination with recommended fertilizer dose (NPK is combination of N, P and K) for crops, viz. Kale and Spinach. The experiment comprised nine treatments (T1=0%SS+0%NPK as Control, T2=25%SS+0%NPK, T3=50%SS+0%NPK, T4=75%SS+0%NPK, T5=100%SS+0%NPK, T6=25%SS+75%NPK,...
Response of food barley (Hordeum vulgaer L.) with combined uses of lime and varied phosphorus sources on acidic nitisols of Wolmera District
August 2021
A field experiment was conducted on acidic nitisols of Wolmera District in two locations at 2017 cropping season to determine the response of barley for the combined application of lime and different phosphorus fertilizers. Several barley growth performances, yield, and plant samples were collected with soil samples to determine soil acidity attributes and nutrient use efficiency. Barley grain yield and growth...
Cadmium and lead contents in compost amended oxisols in the western highlands of Cameroon
August 2021
This study evaluates the Cadmium (Cd) and Lead (Pb) concentrations of an oxisols in a field where the plots had received one, two, and three year’s application of compost (20 t/ha), together with a control plot. The soil was sampled at depths of 0-10, 10-20, and 20-30 cm for analysis of total Cd and Pb principally, but also other soil physico-chemical properties. Cd and Pb bulk contents were measured by atomic...
Soil survey and characterization of soil of Argo- Gedilala Sub Watershed in Dugda District, Central Rift Valley of Ethiopia
July 2021
A detailed study on soil resources characterization based on the understanding of the soil system is not available at Dugda district. With the cognizance of this fact, the present study was conducted to characterize the morphological and physicochemical properties of soils, classify the soils according to World Reference Base for Soil Resources (WRB) of Argo-Gedilala Subwatershed in Dugda District of Oromia Regional...
Vermicompost soil amendment influences yield, growth responses and nutritional value of Kale (Brassica oleracea Acephala group), Radish (Raphanus sativus) and Tomato (Solanum lycopersicum L)
May 2021
Greenhouse experiments were conducted to investigate the effects of various vermicompost amendments on growth responses and nutrient content of kale (Brassica oleracea Acephala group), radish (Raphanus sativus), and tomato (Solanum lycopersicum L), using a completely randomized design with three crop species, four vermicompost treatments and four replications. The twelve treatment combinations consisted of vermicompost...
The evaluation of soil fertility status of open space in campus area and their suitability for tropical fruits production
May 2021
This study aims to determine the level of fertility and the suitability of various types of tropical fruit from open space at Universitas Pendidikan Ganesha campus area in Jineng Dalem, Singaraja. 18 soil samples with 3 depth categories (25, 50, and 75 cm) were collected, and the properties analyzed are limited to the the following parameters: soil texture, pH, base saturation, organic carbon (%), DHL (µs cm-1),...
Arsenic uptake and toxicity threshold for lettuce plants (Lactuca sativa L.) grown in poultry litter amended soils
May 2021
Poultry litter (PL) is used as a soil amendment agriculture, and can contain toxic As, which can accumulate in soils and absorb by plants. A greenhouse study was conducted to evaluate the uptake of As in Kirkham and Sunset soils which received PL for over 20 years. The soils received 0, 5, 10, 15, 20, and 25 mg kg-1 arsenic and black seeded ‘Simpson’ lettuce grown. At maturity, plants were divided into roots...
Effect of agricultural machinery on physical and hydraulic properties of agricultural soils
April 2021
The study assessed effect of farm machinery on both physical and hydraulic properties of agricultural soils used for rice cultivation in northern Ghana. Two tractor models were used for the field experiment with field tests and soil sampling points classified as tractor tyre passage area (TTPA), ploughed area (PA) and unploughed area (UPA). The study used Randomised Complete Block Design (RCBD) with 3 blocks, 3...
Estimation of maize yield gap through soil analysis in small land holding fields at Livingstonia Plateau, Rumphi, Malawi
April 2021
The study was conducted at Livingstonia Plateau in Rumphi District, Northern Malawi to estimate maize yield gaps through the analysis of soil nutrients during the 2018/2019 growing season. Soil analysis was done for one hundred and fifty soil samples collected from the depth of 0 to 100 at an interval of 20 cm from the top, middle and bottom landscapes of the plateau. Soil nutrients analysis was done at the Ministry of...
Fertilizer recommendations for optimal soybean production in North and Center Benin
April 2021
In the traditional cropping systems of Benin Republic, soybean is mostly cultivated with no mineral fertilizer supply, despite the decrease of soil fertility. Furthermore, there is no specific fertilizer available for the crop, in spite of its cash crop character. This leads to weak crop yield in the farmers’ fields. The present study aims to determine the optimal doses of each N, P, K, Mg and Zn nutrient to...
Soil properties and maize (Zea mays L.) growth and yield response to water hyacinth (Eichhornia crassipes) compost application in Lake Victoria Basin, Kenya
February 2021
The decline in organic matter (OM) content and fertility of soils often contribute to losses in agricultural production. This research determined the effects of water hyacinth compost application on selected soil properties and maize growth and yield during a field experiment conducted between February 2020 and August 2020 in Lake Victoria basin, Kenya. The experiment was conducted in a randomized complete block design...
Impact of land use types and soil depths on selected soil physicochemical properties in Fasha District, Konso Zone, Southern Ethiopia
February 2021
Agricultural activities such as deforestation, continuous cultivation and intensive grazing cause deterioration of soil properties. This study was conducted with the objective to investigate the influence of land use types (cultivated, grazing and forest lands) and soil depths (0-15 and 15-30 cm) on soil properties. Eighteen composite soil samples were collected and analyzed using standard procedures and the data was...
Fertility status of soils under selected land use types in Orlu, Imo State, Southeastern Nigeria
February 2021
The study evaluated the fertility status of some land use types in Orlu area of Imo State using elemental ratio. Soil samples were collected from three land use types namely; plantain plantation, oil palm plantation and cassava. A total of 18 samples were collected. Six soil samples were randomly collected from each land use at depths of 0 - 15 cm and 15 - 30 cm. Routine analyses were conducted and Ca/Mg and K/Mg were...
Modifications induced in soil physicochemical properties by repeated fire for different fuel load treatment in a West African savanna-woodland
December 2020
Fire is known to stimulate growth of savanna vegetation, promote species’ diversity, and regulate tree and grass balance. However, the timing and frequency at which savannas are burned and the fuel properties can affect residual soil nutrient content and, ultimately, productivity. The objective of this study is to characterize changes in soil physical and chemical properties in a savanna-woodland subject to...
Effect of rhizobial inoculation combined with phosphorus fertilizer on nitrogen accumulation, growth and yield of soybean in Benin
December 2020
The objective of this study was to determine the amount of phosphorus application needed for the Bradyrhizobium inoculation to improve soybean N uptake and grain yield. Two factors were investigated: inoculation with Bradyrhizobium diazoefficiens strain USDA 110 and application of phosphorus fertilizer with different doses (0; 50; 100 and 150 kg ha-1 P2O5). Trials were carried out in two agro-ecological zones (ZAE) in...
Organic carbon sequestration in mineral soil layers of cold-temperate mixed forests
November 2020
The aim of this study is to analyze the concentration of soil organic carbon (SOC) and C stocks in cold-temperate mixed forests in southern Québec, Canada. More specifically, the analysis deals with SOC concentrations and C stocks with respect to other key soil properties and environmental factors (such as soil pH, nitrogen, texture, structure, bulk density, litter thickness, drainage), including vegetation data...
Effects of lime and phosphorous application on chemical properties of soil, dry matter yield, and phosphorus concentration of barley (Hordeum vulgare) grown on Nitosols of Emdibir, Southern Ethiopia
October 2020
The effects of lime and P fertilizer application on chemical properties of acid soil, and dry matter yield (DMY) and phosphorus concentration of barley were investigated in a greenhouse experiment in 2013. The experimental soil was collected from Emdibir, South-Western Ethiopia. Five lime levels (CaCO3) (0, 6093, 12186, 18280, and 24373 mg CaCO3 kg-1 soil) in a factorial combination with five phosphorus (TSP) rates (0,...
Assessment of selected soil physicochemical properties on different land-use systems and landscape positions at Hamesa watershed, Wolayita zone, Southern Ethiopia
August 2020
The investigation was undertaken at Hamesa watershed of Wolayita Zone with the aim to assess the consequences of land-use systems and topography on the physical and chemical properties of selected soils. Surface soil samples taken at 0-15 and 15-30 cm depths from three land-use systems (enset, grassland and maize fields) were collected under three slope positions (upper, middle and lower). Both the clay and bulk density...
Effect of graded compaction of tilled and untilled sandy loam soil on growth and yield of maize
July 2020
The performance of maize on tilled and untilled sandy loam soil, under different levels of compaction of 0, 2, 4 and 6 tractor-wheel passes in a humid tropical environment was investigated with a Massey Ferguson (MF) 90-disc plough, mounted on an MF 260 tractor. The experimentation had different aspects, respectively conducted in the field and laboratory, at the Rivers State University, Port Harcourt, Nigeria. The...
Effect of biochar application on selected soil properties in Southwestern Nigeria
July 2020
This study investigated the effect of biochar on dispersible clay and soil chemical properties. The treatments consisted of four rates of milled biochar (0, 450, 900 and 1344 kg/ha) arranged in a Completely Randomized Design with four replicates. Surface (0-15 cm depth) soil of Iwo (Sandy loam) and Egbeda (Loamy sand) soil series were collected from the Teaching and Research Farm, Obafemi Awolowo University, Ile-Ife,...
Shea waste slurry as an organic soil amendment of tropical soils in the Tamale Metropolis, Northern Ghana
July 2020
Infertile and less productive soil due to continuous cropping, poor soil management and other forms of land exploitation are mostly amended using inorganic fertiliser. Shea waste slurry (SWS) as an organic soil amendment material was applied to soils in two locations and its effect on plant primary and secondary nutrients evaluated. One-way diagonal method was employed in sampling soil from fields measuring 25...
Comparison of several lime requirement methods in luvisol of Southern Ethiopia
June 2020
Ethiopian soil affected by strong acidity accounts for about 28% of the entire country and 43% of the total cultivated land. Soil acidity is expanding in scope and magnitude. To tackle the problem, lime addition is one of the solutions. The lack of soil specific lime recommendation method(s) to amend the increasing acidification problem has been one of the challenges to boost crop production. Therefore, a greenhouse...
Validation of blended NPSB fertilizer rates on yield, yield components of Teff [Eragrostis tef (Zuccagni) Trotter] at vertisols of Hatsebo, Central Tigray, Ethiopia
June 2020
Application of unbalanced nutrition was the main yield limiting factor in the study area. Hence, an experiment was conducted during the 2017 cropping season on farmers’ fields to validate and determine optimum blended fertilizer rate for teff production. Eight levels of NPSB (0, 25, 50, 100, 150, 200, 250 and 300 kg ha-1) and recommended NP (100 kg ha-1 urea and 100 kg ha-1TSP) were used as treatments and set in...
Economic importance of termites and integrated soil and water conservation for the rehabilitation of termite-degraded lands and termite management in Ethiopia
May 2020
In Ethiopia, termites pose serious threat to a variety of agricultural crops, forestry, rangelands, houses and other wooden structures. Termite problem is particularly prevalent in the western part of the country, where it has persisted for many years and has received wide publicity. Termites appeared in the region for the first time in 1904 at a specific place called Bafano Koreche around Kiltu Kara town in West...
Effect of flooding on peatland in U Minh Thuong National Park, Vietnam
May 2020
U Minh Thuong National Park is one of the two significant areas of peatland swamp forest remaining in Vietnam, and is recognized as one of the three highest priority sites for wetland conservation in Mekong Delta. A large area of Melaleuca Forest in the park was destroyed and degraded by a devastating fire in 2002. Besides this, an artificial flooding technique for controlling fire applied all over the park for several...
Soil conservation techniques among arable crop farmers in Odo Otin local government area, Osun state: A multinomial logit approach
May 2020
The study investigated the soil conservation techniques among the arable farmers in Odo Otin local government area of Osun State. Two-stage sampling procedure was employed for the study. Primary data were collected from 120 arable crop farmers in the Local Government Area. Data collected were analysed using descriptive statistics; multinomial logit regression model. Result shows that most the respondents were aware of...
Compost biomass, pH value and C, N, K contents of some local wild plant species: Case of Panicum maximum L., Trypsa- cum laxum L. and Pueraria javanica (Benth.) Benth, in the Region of Kisangani, Democratic Republic of Congo
April 2020
Soil fertility transience and weed management are often among decried impediments undermining agricultural productivity in many tropical countries. A study aiming at transforming baffling problems of abundant weed biomasses especially that of Panicum maximum (T1), Tryps-acum laxum (T2) and Pueraria javanica (T3), often cause of crop yield loss into advantage to enhance soil fertility, increase crop productivity as well...
Use of charcoal (biochar) to enhance tropical soil fertility: A case of Masako in Democratic Republic of Congo
March 2020
Soil fertility transience in the region of Masako in Democratic Republic (RD) of Congo remains a major challenge to sustainable agricultural production. Recently, biochar application as soil amendment has attracted attention of the people across the world owing to its potential to improve soil physicochemical properties, crop yield and carbon sequestration into the soil. A study was conducted in Masako to analyze the...
Soil moisture retention and rainfed wheat yield variations by the addition of gypsum and green manure
March 2020
In rainfed tract, the success of agriculture depends on conservation and efficient use of soil moisture and nutrients availability that directly linked with the presence of moisture in soil. The moisture can be conserved through several means including green manures and gypsum addition. The experiment was conducted to investigate the integrated effect of green manures and gypsum for moisture conservation and their...
Effects of long term sugarcane production on soils physicochemical properties at Finchaa sugar Estate
March 2020
In Ethiopia, where sugarcane has been cultivated for over 20 years, changes in soil physicochemical properties are expected to occur albeit information on the extent of change is scanty. A study was conducted in 2015 at Finchaa Sugar Estate with the objective of assessing the status of selected soil properties under long term mechanized sugarcane cultivation. Disturbed composite and undisturbed soil samples from 0-30...
Optimization of the analytical method for the determination of organic matter
February 2020
Soil organic matter represents the remains of roots, plant materials, dead organisms in varies stages of decomposition and synthesis and is variable in composition. Walkley-Black method for the determination of organic matter is the most common method; however, it requires a lot of reagents and chemicals including potassium dichromate which is toxic especially when it is in a hexavalent form. It is very important to be...
Effect of vermicompost and blended fertilizers rates on yield and yield components of Tef (Eragrostis tef (Zucc.) Trotter)
November 2019
Tef is a stable crop in Ethiopia in which its yield is constrained by poor soil fertility management. Therefore, a field experiment was conducted for two consecutive years during 2016 and 2017 on clayey textural soil to assess the effect of vermicompost and inorganic fertilizer rates on yield and yield components of tef. Accordingly, field experiment with four levels of vermicompost (0, 2, 4 and 6 t ha-1) and four...
Soil bulk density, soil moisture content and yield of Tef (Eragrostis tef) influenced by Acacia seyal Del canopy in Parkland agro-forestry system
October 2019
The effect of Acacia seyal tree on soil bulk density, soil moisture content, grain and biomass yield of tef (Eragrostis tef) were examined on six selected comparable A. seyal trees on croplands. Composite soil samples (6 trees × 3 distances × 2 soil depths) were collected at three distances from the tree base (1, 2.5 and 9 m) and two soil depths (0-15 and 15-30 cm) in four radial directions. Grain and...
Soil characterization and evaluation of blended (YaraMila cereal) fertilizer for bread wheat (Triticum aestivum L.) production at Aleltu areas in North Shewa Zone of Oromia region
September 2019
The main objective of the study was to characterize the soils on the basis of selected soil physicochemical properties and to evaluate the effects of blended fertilizer (YaraMila cereal) applications on yield and yield components of bread wheat on the major soil types in the study area. The field experiment involved 5 treatments (control, three rates of blended fertilizer and recommended nitrogen and phosphorus...
Impacts of soil and water conservation on crop yield, soil properties, water resources, and carbon sequestration: A review
September 2019
This paper reviews the impact of soil and water conservation (SWC) measures on crop yield, soil properties, water resources and carbon sequestration. Land degradation due to soil erosion in Ethiopia is too severe which affects the livelihood of a community and ecosystem functions. The dry and highland part of the country was identified as seriously vulnerable to land degradation because of soil erosion. And, soil...
Evaluation of some selected forage grasses for their salt tolerance, ameliorative effect and biomass yield under salt affected soil at Southern Afar, Ethiopia
September 2019
Soil salinity is a growing problem on many irrigated parts of arid and semi-arid areas of Ethiopia. Utilization of improved salt-tolerant forage grasses help farmers to maximize production and reclaim saline soil. A study was conducted at Werer Agricultural Research Center (WARC) from 2012 to 2014 to evaluate performance of four forage grass species of salinity tolerance, ameliorative effect and biomass production. The...
Characterization and agricultural potentials of some pedons derived from sand stone parent rock near Abeokuta, Southwestern Nigeria
August 2019
Successful crop production requires the knowledge of soil variation and the evaluation of the agricultural potentials of the land. Detailed land resource survey of approximately 100 ha land in Abeokuta North Local Government Area of Ogun State was carried out. Identified soil mapping units were examined in modal profiles. The soils were classified using the USDA Soil Taxonomy, FAO/IUSS World Reference Base (WRB) system...
Spatial distribution of heavy metals in soil with distance from Tazama pipeline through the Mikumi National Park, Tanzania
July 2019
A total concentration of six studied heavy metals Arsenic (As), Lead (Pb), Chromium(Cr), Mercury (Hg) Cadmium (Cd) and Copper (Cu) were measured in soil across distances from TAZAMA pipeline in transects which have incidences of oil spillage and those which have no history of oil spillage. All studied heavy metals were detected in the study area. As, Pb and Cr were detected in both transects, that is, with oils spills...
Technical viability of physical soil and water conservation structures implemented in Lake Hawassa watershed, southern Ethiopia.
May 2019
Physical soil and water conservation measures with ultimate intention of reducing sever soil erosion and its associated impact had been implemented for the last four decades in southern Ethiopia. Yet, so far the technical viability of the implemented structures weren't studied. Therefore, the objective of this study was to evaluate the technical viability of the implemented physical soil and water conservation...
Nitrogen use efficiency of tef [Eragrostis tef (Zucc.) Trotter] as affected by nitrogen fertilizer under chickpea-tef rotation at Tahtay Koraro District, North Ethiopia
May 2019
Study was carried out to evaluate the supplementary nitrogen requirement of tef to enhance nitrogen use efficiency of tef grown under chickpea-tef rotation cropping. On-farm, experiment was conducted during the 2015 main cropping season at Tahtay Koraro District of the Tigray regional State, Ethiopia on tef after preceding chickpea. The experiment was set in a randomized complete block design with three replications....
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