Research Papers/Topics in Soil Science

Mobility of Heavy Metals from the University of Nigeria Sewage-Sludge Disposal Site to the Surrounding Soils and Plants

ABSTRACT This study was carried out at the University of Nigeria, Nsukka sewage disposable site. The study was to quantify the mineral contents of sewage sludge and assess their mobility in the soil and plants around UNN disposal site. The experimental layout was a 4x3 factorial in RCBD in which distance from the sewage disposal site and soil depth were the two factors under consideration. The distances from sewage pond were 0 (edge), 100, 300 and 2000 m away from the sewage pond with 2000 m...

Heavy Metals Content In Soils In The Vicinity of Refuse Dumpsites In Calabar South, LGA

 ABSTRACT This study was done to evaluate the risk of heavy metals pollution of soils within the vicinities of refuse dumpsites in Calabar south, LGA. Soil samples were collected from a depth of 0-20cm with the use of a soil auger from ten (10) dumpsites using the stratified sampling method.  The samples were well labelled in polythene bags and transported to the laboratory where it was air-dried and subjected to physico-chemical analysis. Heavy  metals such as lead (Pb), cadmium (Cd), c...

Combined Effect of Salinity Potassium Humate on Growth and Physiology of Soybean (Glycine max L).

These experiments were conducted to study Potassium Humate's effect on soybean growth and yield. Seeds were sown in pots and a single dose of Potassium Humate was applied in a single dose and water as a control. Soybean was grown in salt-affected soil to check the salt tolerance of soybean. Potassium Humate addition maintained higher contents of soil water, salt, and mineral nitrogen in the wetting pattern by enhancing the soil water-holding capacity. The obtained results indicated that the a...

Comparative Effects of Lime, Poultry Manure and Npk Compound Fertilizer on Soil Physicochemical Properties and Yield of Maize in an Ultisol of Southeastern Nigeria.

ABSTRACT Field and greenhouse experiments were conducted at the University of Nigeria, Nsukka, in 2011, to examine the effects of lime, poultry manure and NPK 15-15-15 on the soil nutrient content and yield of maize. The experiment was first carried out in the greenhouse and later evaluated in the field. The experimental designs used were 6 x 4 factorial in completely randomized design (CRD) and randomized complete block design (RCBD) for the greenhouse and field experiments respectively. Two...

Phosphate Mobilization by Addition of Organic Acids in Two Soils of the Southern Guinea Savanna of Nigeria

ABSTRACT One mechanism by which plants can mobilize organic and inorganic forms of phosphorus (P) in soils is by exudation of low molecular weight organic acids. Laboratory and field trial were carried out during 2011 and 2012 cropping seasons to study the effects of additions of organic acids ( citric, oxalic and tartaric acids) on the mobilization of phosphate of soils from Minna and Mokwa, both in Southern Guinea Savanna of Nigeria. For initial laboratory studies and prior to field cultiva...

Effects of Cover Management Practices on Physical Properties, Runoff and Erosion in Nsukka Sandy Loam Soil

ABSTRACT A two –year (2004/2005) field investigation was carried out on the runoff plots at the University of Nigeria Nsukka farm, to monitor the effects of cover management practices on physical properties, runoff and soil loss in Nkpologu sandy loam soil. The management practices were barefallow (BF), cocoyam (CY) sorghum (SG), legume (CP) and grass (PM), under no-till practice. There was no change in soil texture due to treatments. The treatments generally increased soil organic matter c...

Characterization and Mapping of Gully Erosion Features in Two Geological Formations of Eastern Nigeria Using Global Positioning System (Gps) and Satellite Aerial Photo

ABSTRACT With the aid of Global Positioning System (GPS) and Satellite Aerial Photo, a comparative characterization and mapping of soil gully erosion features on two geological formations were carried out in Nsukka area of eastern Nigeria. The two geological formations were Ajali and Mamu formations. The study involved the use of base map created using a Geographic Information System (GIS) (GPS Track Marker) and Satellite Photo downloaded from the internet using the same GIS (GPS Track Marker...

Assessment of Soil Biological and Physico-Chemical Benefits of Legume-Cereal Rotation Systems in Derived Savanna Zone of Nigeria

Abstract Green house and field experiments were undertaken in this study. The green house study was done in International Institute of Tropical Agriculture (IITA), Ibadan, green house, while the field experiments were conducted in the Department of Soil Science, University of Nigeria, Teaching and Research Farm and Dominican Centre for Human Resources Development, Moniya-Ibadan Farm in 2008 and 2009 crop years. The green house study was a 2 x 3 x 2 factorial in completely randomized design (C...

Comparative effect of Groundnut Genotypes on Yield and N Fixation in the Sudan and Northern Guinea Savannahs of Nigeria

ABSTRACT Recognition of high yielding and nitrogen (N) fixing groundnut genotypes and desegregating them in the cereal-based cropping systems common in savannah regions will enhance food security and reduce the need for high N fertilizers hence, minimize the high cost and associated environmental consequences. Field trials were conducted during the 2015 growing season at the Research Farms of Bayero University Kano (BUK) and Institute for Agricultural Research (IAR), Ahmadu Bello Univer...

Appraisal and Mapping of Soil Salinity and Sodicity problems in Sector one of Watari Irrigation Scheme, Kano State

ABSTRACT One of the main reasons for the loss of productive land in irrigated fields is the buildup of salinity in the soil. In the watari irrigation Scheme, no systematic appraisal and mapping have been made before within the sector. The study area was selected after a reconnaissance survey based on the farmer's complaint about the low production. Global positioning system (GPS) was used to record the coordinate, and delineate the boundary of the study site. The coordinates of the delinea...

Genotypic EFFECT of Groundnut on Nodulation, N Fixation and N Balance in two Savannahs of Nigeria

Abstract Identification of high N-fixing groundnut genotypes and integrating theminto the prevailing cereal-based cropping systems can reduce the need for nitrogen (N) fertilizers, thus minimizing their high cost and associated environmental consequences. This study was conducted to estimate the amount of symbiotically fixed N by groundnut genotypes and its contribution to soil N and yield of groundnut. Trials were carried out during the 2015 rainy season at Bayero University Kano (BUK) Agr...

Assessment of Crude Oil Degradation and Hydrocarbon Utilizing Bacteria Associated with Some Beach Soils in Ghana

ABSTRACT Ghana discovered oil in 2007 at Cape Three Point in the Western Region. It experienced its first low-based mud oil spillage in 2009 and 2010. Ghana is therefore exposed to possible oil spillage due to oil production in commercial quantities. It is against this background that the present study is aimed to assess the degradation along the coast and identify hydrocarbon utilizing bacteria (HUB) associated with some beach soils. The beach soils were taken from eight coastal towns; Afla...

Soil Porosity and Water Infiltration as Influenced by Tillage Practices on Federal University of Agriculture Abeokuta, Ogun State, Nigeria Soil

 Abstract The relations between soil pore structure induced by tillage and infiltration play an important role in flow characteristics of water and solutes in soil. The effects of agricultural management practices on soil physical parameters aid the effective sustainability of soils. In this study, three tillage methods common to the study area on porosity and water infiltration were assessed. Tillage treatments include zero tillage (Plot covered with vegetation (conservation tillage)...

The Effects of Soil Degradation to Sustainable Agriculture in Chongwe District, Zambia

The aim of this study was to investigate the effects of land degradation on agricultural land use, planning and management in chongwe, Zambia and specifically determined farmers’ considerations of land suitability for selected types of agricultural land uses in varying cropping zones, investigated farmers’ local environmental knowledge of land degradation indicators and finally documented farmers’ land management strategies and practices for soil and sustainable Agricultural conservatio...

Effects Of Manure, Lime And Phosphorus Fertilizer On Soil Properties And Soybean (Glycine Max L.) Yields In Embu County, Kenya

Agricultural sector in Kenya, contributes with 25% on GDP, yet this sector is far to supply adequate food for an increasing population due to declining soil productivity. Soybean (Glycine max L. Merrill) is relatively new crop being introduced in smallholders farming system in the Central Highlands of Kenya as source of nutrition, income generation and soil fertility improvement. However, the crop yields are below the national average. Soil acidity and depletion of nutrients affect negatively...


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