Volume 30 (2020)

1

Research Article

Influence of Tillage - Seedbed and Manure - Npk - Micronutrient Management Options on Selected Soil Properties of Sandy - Loam Ultisols Evaluated Using Sweet Potato

Obalum S.E^*, , Ogumba P.O., Uzoh I .N

This study assessed the effects of tillage and nutrient management practices on selected soil properties of degraded coarse-textured Ultisols and responses of sweet potato in Nsukka, southeastern Nigeria. It involved three tillage-seedbed types viz zero-tilled flatbed (ZT-FB), conventionally tilled-flatbed (CT-FB) and conventionally tilled tie-ridge (CT-TR), each with seven soil fertilizer amendme...

Dec, 2020 pp. 117-125

2

Research Article

Effects of Tillage and Fertilizer on Soil Properties and Yield of Sesame Varieties in Makurdi, Nigeria

Usman, M.^*, A. Ali, Agber, P.I.

Field experiments were undertaken during the cropping seasons (August- December) of 2018 and 2019 at the Teaching and Research Farm, Federal University of Agriculture, Makurdi-Nigeria. The objective of the study was to determine the effects of tillage and fertilizer on soil properties and yield of sesame varieties with a view to identify appropriate tillage practice (s) and fertilizer rate that wi...

Dec, 2020 pp. 106-116

3

Research Article

Impact of Land Use on Spatial Distribution of Soil Nutrients in Akure North and Akure South Local Government Areas of Ondo State, South West Nigeria

Dada B. F^*, Ewulo Babatunde Sunday, Awodun M.A., Ajayi S.O., Olajire O.O.

Land use has great impacts on the distribution of nutrients in soils, Anthropogen- ic activities and recorded increase in population density in the study area is ex- pected to lead to great changes in the soil spatial nutrients distribution, data on the spatial distribution of nutrients in Akure North and South Local Government Area (LGA) of Ondo state is scarce, therefore it is important to fill ...

Dec, 2020 pp. 70-79

4

Research Article

Effects of Land Use on Forms of Phosphorus in Coastal Plain Sands of Nigeria

Obi J. C.,^*, Ibia, T. O, Ikott, I. E.

This research studied the effect of land uses changes on the forms of phosphorus within the coastal plain sands landscape of southeastern Nigeria. Satellite imageries and soil data including phosphorus fractions were used for the study. Spatial coverage of forest and agricultural (fallow and farmland) land uses, accompanying soil properties and forms of phosphorus were estimated. There was progres...

Dec, 2020 pp. 31-41

5

Research Article

Impact of Land Use System on Soil Quality in Southwest Nigeria

Amosu, S. A.^*

A soil quality (SQ) evaluation was conducted on three different farm locations in the Ijebu-Igbo region of Ogun State Nigeria to ascertain the health status of the soils. The farmlands have been subjected to different land use systems (LUS) for over ten years including plantain/banana orchard, arable farming and fallow/secondary forest. Soil samples were obtained at 0-30 cm and 30-60 cm depths fro...

Dec, 2020 pp. 17-22

6

Research Article

Evaluation of Soil Development on an Erosional Landscape of the Nigerian Guinea Savanna

Ayodele Owonubi^*

Soil landscape relationship is an essential tool for evaluating soil development. This study was carried out to evaluate soil development on an erosional land- scape of the Nigerian guinea savanna. Field studies were carried out by augering to a depth of 105 cm and by studying soil profiles along gully walls and stream channels in selected locations. Profile description and soil sampling were done...

Dec, 2020 pp. 95-99

7

Research Article

Effect of Organic Soil Amendments on Soil Chemical Properties in Sudan Savannah of Nigeria

Aliyu Abdulkadir^*, Mansur U. Dawaki, Mahmud Sani

Composite soil samples were collected from irrigated maize fields, to study the effect of Bio char and Compost on post harvest soil chemical properties in the Sudan Savannah of Nigeria. Laid on a completely randomized block design, the treatments used in the experiment were 5tha-1 Bio char, Compost, and Control. Pre-amendments application and post maize harvest soil characteristics obtained from l...

Dec, 2020 pp. 100-105

8

Research Article

Micronutrient Status of Grain Size Fractions in Soils of Land Uses in Mbano, Southeastern, Nigeria

Bethel Ugochukwu Uzoho^*, Irokwe I. F.

Micronutrient status in grain size fractions provides information on the active soil fraction and the ability for stabilization against microbial decomposition. Total, available, exchangeable and water-soluble Fe, Zn,Cu and Mn in bulk and grain size soil fractions were evaluated in three landuse types (Cassava, Cashew and Oil palm) in Ehime Mbano, Southeastern, Nigeria. Also, selected soil propert...

Dec, 2020 pp. 23-30

9

Research Article

Effect of Land - Use on Particulate Organic Carbon and Carbohydrates Distributions in Dry - and Wet - Sieved Stable Aggregates in an Ultisol

Udom B. E.^*, Simon U. G.

Particulate organic carbon (POC) and carbohydrates (R-CHO) distributions in dry- and wet-sieved aggregates in four land-use types in southern Nigeria were studied. The land-use types were: secondary forest, 5-year fallow plots, cocoa plantation, and 5-year continuous cultivation. The results showed that land types affected soil organic carbon fractions, soil organic carbon density, bulk density, a...

Dec, 2020 pp. 1-8

10

Research Article

Assessment of the Responsiveness of Soybean Varieties to Bradyrhizobium Japonicum Inoculation in Ogbomoso, Southwest Nigeria

Olaboopo, M. T., Kolawole, G. O.^*

Soybean varieties may respond differently to rhizobium inoculation, for im- proved yield and nitrogen fixation. Therefore, responses of ten soybean varieties to rhizobium were evaluated in 2018 at the Ladoke Akintola University of Tech- nology, Ogbomoso, Nigeria, to determine if rhizobium will improve the perfor- mance of the varieties. The soybean varieties (main plot) and rhizobium (+ or -, subp...

Dec, 2020 pp. 9-16

11

Research Article

The Impact of Land Use Types and Acidity Indices on Soil Humic Fractions Quantities at Umudike, Tropical Rainforest, Nigeria

Onwuka, M. I^*, Okonta, U, Asobia, P. C.

Natural humic fractions deposited in the soil are most times sources of industrial humic substances use for crop production. However, the quantities of the humic substances, which are components of soil organic matter, are affected by lots of factors and processes, including land- use. The effects of different land- use and soil acidi0ty indices on the quantity of soil humic fractions at Umudike, ...

Dec, 2020 pp. 42-52

12

Research Article

Impact of Land Use/cover on Carbon Sequestration in Afaka Forest Reserve, Northern Guinea Savanna of Nigerian

Jimoh, A. I.^*, Sulaiman Yau Lawan, Odunze Azubuike Chidowe, Sawa, B.A,

This study aims to assess the impact of land use/cover on carbon sequestration in Afaka Forest Reserve. Six (6) land use/cover types were delineated and used in the study area. This includes Eucalyptus plantation (EP), Farmland (FL), Gme- lina plantation (GP), Mixed plantation (MP), Natural plantation (NP) and Teak plantation (TP). A profile pit was dug in the middle of each of the delineated land...

Dec, 2020 pp. 88-94

13

Research Article

Suitability of Urban Waste Land Use in Relation to Heavy Metal and Micronutrient Influence on Soil and Green Amaranth Production in Southeast Nigeria

Ezeifeka A.O^*, , Ezeaku, P.I., Ezeaku, V. I, Anikwe M. A. N, Kefas, P. K, Ofem, K.I

An assessment of the impact of long term (>20 years) MSW disposal on soil properties and their suitability for crop productivity was carried out in Anambra and Enugu States of southeast Nigeria. Four dumpsites were selected (two in each state) and, 12 soil auger samples (2 sampling points at 3 depths and 2 repeated measures) each were collected at incremental depth intervals of 0-20, 20-30, and 30...

Dec, 2020 pp. 62-69

14

Research Article

Comparison of the Characteristics of Soils of Isolated Forests and Adjacent Grasslands in Nsukka Area of Enugu State, Nigeria

Asadu, C.L.A^*, Odugu C.

The soils of isolated forests on hilltops and the surrounding grasslands in three locations at Ashor Hill, AttabaHill, and Umuowo Hill, all in Nsukka area were comparatively characterized. Two auger samples were collected (0-20 and 20-40cm) from each vegetation type per location giving a total of 12 auger samples while two profiles pit each were dug, described and sampled. In all, 24 samples were ...

Dec, 2020 pp. 53-61

15

Research Article

Land Suitability Evaluation and Management of Ultisols for Some Tree Crops Cultivation in South South Nigeria

Okunsebor F. E^*, Umweni A. S.

A rigid grid soil survey was done on 115.5 hectares of land in Ultisols of South Southern Nigeria at a detailed scale to evaluate its suitability for the cultivation of some tree crops (Cocoa, Plantain, Cashew, Pawpaw and citrus). Mapping units were delineated on the basis of morphological characteristics examined at 100 m along traverses which were cut at intervals of 100 m from a predetermined b...

Dec, 2020 pp. 80-87

16

Research Article

Pedogenic Forms of Iron and Manganese and Its Implication on Soil Genesis Over a Lithosequence in Nigeria

Babalola, T.S.^*, Fasina A.S.

The citrate-bicarbonate-dithionite extractable iron and manganese oxides (Fed and Mnd), oxalate extractable iron and manganese oxides (Feox and Mnox), sodium pyrophosphate extractable iron and manganese oxides (Fep and Mnp), active iron and manganese oxide ratios (Feox/d and Mn ox/d) and Clay/dithionite iron ratio (clay/ Fed) were evaluated in soils derived from schist and older granite in two agr...

Aug, 2020 pp. 49-53

17

Research Article

Effect of Organic Soil Amendments on Soil Chemical Properties in Sudan Savannah of Nigeria

Aliyu Abdulkadir^*, Mansur U. Dawaki, Mahmud Sani

Composite soil samples were collected from irrigated maize fields, to study the effect of Bio char and Compost on post-harvest soil chemical properties in the Sudan Savannah of Nigeria. Laid on a completely randomized block design, the treatments used in the experiment were 5tha-1 Bio char, Compost, and Control. Pre-amendments application and post maize harvest soil characteristics obtained from l...

Aug, 2020 pp. 123-128

18

Research Article

Influence of Soil Amendment with Poultry Droppings on the Soil Properties and Productivity of Cucumbers (cucumis Sativus L.) on a Degraded Ultisol in Nsukka Area, Southeast Nigeria

Okebalama C.B^*, Ogunezi K.C, Agbo I.C, Asogwa K C

Poultry manure (PM) input is globally utilized for enhancing and maintaining soil fertility in vegetable farming. In many tropical regions, however, ‘site’ specific PM rate for optimum crop yield is lacking. A three-year continuous cucumber cultivation with 0, 10, 20 and 30 t/ha PM rates in three replicates, were arranged in RCBD on an Ultisol. Soil physicochemical properties and cucumber yield re...

Aug, 2020 pp. 85-94

19

Research Article

Effects of Climatic Variations on Leaf Litter Production in A. Floribunda Agroforestry System in South - East Nigeria

Keyejo, A.O, Okpara, D.A., Onyeonagu, C.C., Eteng, E.U^*

Field experiment was conducted between 2016 and 2018 at Forestry Research Institute of Nigeria (FRIN), Humid Forest Research Station, Umuahia, South-east Nigeria, to study litter production and climatic influence in Allanblackia floribun- da (oliv) agroforestry system. The experiment was laid out in a randomized com- plete block design (RCBD) with three replications. Litter trays were used for mon...

Aug, 2020 pp. 42-48

20

Research Article

Comparative Effects of Sole and Combined Application of Organic and Inorganic Fertilizer on Soil Quality and Rubber Seedling Performance at Edo State Iyanomo, Nigeria

Izevbigie F. C^*, Ogboghodo, I. A, Orhue, Ehi Robert, Ogbemudia, Okundia R.O., Eseimude U.

A field experiment was conducted at Rubber Research Institute of Nigeria, Edo state Iyanomo during the 2014 wet season to determine the comparative effects of the sole and combined application of organic and inorganic fertilizer on soil, and Rubber seedling performance and the experiment consisted of six treatments. The treatments were laid in a Randomized Complete Block Design (RCBD) with three r...

Aug, 2020 pp. 1-9

21

Research Article

Effect of Simulated Acid Rain on Growth and Micronutrient Uptake of Okra (abelmoschus Esculentus) on Coastal Plain Sands in Abia State, South - Eastern, Nigeria

Eteng, E.U.^*, Essien G. E

The study was conducted in April 2019 at Umudike to examine the impact of simulated acid rain (SAR) and frequency of SAR spray on growth and micronutrients content of okra (Abelmoschus esculentus (L.) Moench) in an ultisol at Umudike. The treatments consisted of three (3) pH levels: Coca-cola solution (pH 2.7) and SAR (pH 3.5 and 5.5) as well as control (water) and, three (3) frequency of foliar s...

Aug, 2020 pp. 34-41

22

Research Article

Characterization, Land Capability and Fertility Classification of Soils Along Kpantinapu - Nukkai Toposequence in Jalingo, Taraba State

Gisilanbe S A^*, Hashim, S.A.,, Garpiya B. T, Kussiy J. J, Ibrahim I. S

The objective of this study was to characterize the soils of the study area, deter- mine some soil properties and classify the soils according to USDA Taxonomic System. Coordinates of the Pedons were obtained using hand held Geographic Positioning System (GIS) and one (1) profile pit was dug at the upper, middle and lower slope respectively. Some soil physical and chemical properties were deter- m...

Aug, 2020 pp. 24-33

23

Research Article

Tillage and Rice Mill Wastes Mulch and Their Effects on Soil Properties and Yield of Cassava (manihot Spp.) on a Typic Psamment at Abakaliliki, Southeastern Nigeria

Nwite, J.N^*, Onwuso, G.I.

The experiment was undertaken using cassava (Manihot spp) to evaluate effects of different tillage practices and mulching (raised mulched bed, raised not mulched bed, flat mulched bed, flat not mulched bed, untilled mulched bed and untilled not mulched bed) on soil properties and cassava sprouting and yield in 2016 and 2017 planting seasons on a Typic psamment in Ikwo, Ebonyi State, Southeastern N...

Aug, 2020 pp. 17-23

24

Research Article

Effects of Poultry Litter and the Residues of Maggot’s Production on Chemical Fertility of a Lixisol and Maize (zea Mays L.) Yield in Western of Burkina Faso

Kalifa Coulibaly^*, Fernand Sankara, Salimata Pousga, Philippe J. Nacoulma, Marc B. Somé, Hassan B. Nacro

Organic substrates have shown their importance in the sustainable management of soil fertility and crops production. A study was conducted during 2 years (2016 and 2017) at western of Burkina Faso to evaluate the effects of poultry litter (PL) and the residues of maggots’ production (RMP) on soil chemical fertility and maize yield. The experimental design was a completely randomized block design w...

Aug, 2020 pp. 95-102

25

Research Article

Characterization, Classification and Agricultural Potentials of Some Coastal Plain Sand Derived Soils in Lagos State

Orimoloye Julius^*, Okpitari Simeon

Detailed soil surveys were carried out on a total of 194.5 hectares of the land at Igbokuta and Ibomwon areas in Ikorodu and Epe local government areas of Lagos state. Grid survey method was employed, and mapping units were delineated based on soil morphological characteristics examined at an interval of 70m along transects that were laid 100m apart. The soils were classified according to local so...

Aug, 2020 pp. 66-75

26

Research Article

Influence of Granulometric Composition and Organic Matter Management on Soil Stability Against Water Erosion in Southeastern Nigeria

Ezeaku, V. I^*, Sunday Ewele OBALUM, , Ezeaku, P.I., Igwe C. A

The study investigated the influence of granulometric composition and organic matter on soil stability and eroded sediment under simulated rainfall for some soils from southeastern Nigeria. The experiment was conducted at the Glasshouse of the Department of Soil Science, University of Nigeria Nsukka (UNN). The experimental design was a 3 x 3 factorial in CRD replicated three times and involved thr...

Aug, 2020 pp. 103-112

27

Research Article

Fertility Capability Classification of Soils Supporting Rice Production in Ebonyi State, Southeastern Nigeria

Obasi S. N.^*, Obasi C. C.

This research was carried out to characterized and classify fertility capability to enhance the productivity of rice in Ebonyi soils. Ebonyi state was grouped into three zones according to their agricultural zones namely, Ebonyi north, Ebonyi central and Ebonyi south, representing Abakaliki, Ikwo and Ivo locations, respectively. Major rice growing areas of the soils were located and two profile pi...

Aug, 2020 pp. 113-122

28

Research Article

Influence of Soil Amendment with Poultry Droppings on the Soil Properties and Productivity of Cucumbers (cucumis Sativus L.) on a Degraded Ultisol in Nsukka Area, Southeast Nigeria

Nwite, J.N^*, Njoku C., Nwogbaga, A.C

Poultry manure (PM) input is globally utilized for enhancing and maintaining soil fertility in vegetable farming. In many tropical regions, however, ‘site’ specific PM rate for optimum crop yield is lacking. A three-year continuous cucumber cultivation with 0, 10, 20 and 30 t/ha PM rates in three replicates, were arranged in RCBD on an Ultisol. Soil physicochemical properties and cucumber yield re...

Aug, 2020 pp. 85-94

29

Research Article

Structural Dynamics and Productivity of a Paleudult Amended with Agro - Wastes in Abakaliki, Southeast Nigeria

Nwite, J.N, Njoku C.^*, Nwogbaga, A.C

This research was conducted in 2015, 2016 and 2017 cropping seasons in the Department of Soil Science and Environmental Management, Ebonyi State University Research Farm to determine the effect of agro-wastes on soil structural dynamics, productivity and maize grain yield. Treatments were laid out in Randomized Complete Block Design (RCBD) with four treatments replicated five times. The treatments...

Aug, 2020 pp. 76-84

30

Research Article

Assessment of the Responsiveness of Soybean Varieties to Bradyrhizobium Japonicum Inoculation in Ogbomoso, Southwest Nigeria

Olaboopo, M. T.^*

Soybean varieties may respond differently to rhizobium inoculation, for im- proved yield and nitrogen fixation. Therefore, responses of ten soybean varieties to rhizobium were evaluated in 2018 at the Ladoke Akintola University of Tech- nology, Ogbomoso, Nigeria, to determine if rhizobium will improve the perfor- mance of the varieties. The soybean varieties (main plot) and rhizobium (+ or -, subp...

Aug, 2020 pp. 9-16

31

Research Article

Variability of Some Soil Properties Along a Toposequence in a Basaltic Parent Material of Vom, Plateau State Nigeria

Mahmud A. T.^*, Hassan I. M, SHEHU Bello Muhammad, Samndi M. A.

Topography influences the distribution of some soil physical and chemical properties. This study assessed some variation in soil properties resulting from the topographic effect on Basaltic parent material at Vom Jos Plateau State in the Southern Guinea zone of Nigeria. Soil samples were collected at an interval of 20m and at depths of 0 to15cm and 15 to 30cm, parcelled, labelled and taken to the ...

Apr, 2020 pp. 77-81

32

Research Article

Effect of Tillage and Maize - Cowpea Intercrop on Fractal Features of Particle and Aggregate Size Distribution on a Tropical Sandy Loam Soil in Southwest Nigeria

ADESODUN Johnson Kayode^*, Udom B. E., Adekunle A. O, Adejuyigbe C. O.,, Atayese M. O., Olowokere F. A., Mbila M., Oyegoke, C.O,

The effects of tillage and cropping pattern on soil aggregation, fractal dimensions and distribution of organic carbon fractions were studied. Treatments were no- tillage (NT), conventional tillage (CT), and four cropping patterns viz: sole maize, sole cowpea, maize-cowpea intercrops and control (no crop). Soil samples were analysed for particle size distribution (PSD), aggregation ratio (AR), mea...

Apr, 2020 pp. 102-110

33

Research Article

Classification and Fertility Status of Soils on Slopes of Varying Orientations in Umuahia Area of Abia State, Nigeria

Aliba, V.O.^*, Onweremadu E. U, Aririguzo, B. N, Okoli N. H

The slope orientation and position of toposequence influence soil properties along the landscape. The study classified and evaluated the fertility status of soils on slopes of varying orientations in Umudike (East-lying Toposequence) and Itu (West-lying Toposequence) located in Olokoro Umuahia, Abia State southeastern Nigeria. Transect soil sampling technique was employed in locating 3 distinct to...

Apr, 2020 pp. 111-123

34

Research Article

Effect of Different Organic Composts and Inorganic Fertilizer on Nodulation, Nitrogen Fixation and Grain Yields of Soybean (glycine Max L.) Under Field Conditions

Ogunrewo, O. M^*, Olayinka A., Taiwo, L. B, Oyedele, O. A

The study assessed the effects of composted corn wastes, poultry droppings and inorganic fertilizer on the number of nodules, nitrogen fixation and grain yields of soybean (Glycine max L.) under field conditions for 2 seasons. The experiments were conducted in the research sub-station of the Institute of Agricultural Research and Training, (IAR&T), Ilora, Oyo State, South Western Nigeria: (Derived...

Apr, 2020 pp. 63-69

35

Research Article

Land Suitability Evaluation for Maize Production and Taxonomic Classification of Soils Overlying Undifferentiated Basement Complex in Northeast Nigeria

Kefas, P. K^*, Maigida, E, , Ezeaku, P.I., Ofem, K.I, Akwoga, J.A, Ezeaku P

Soil characterization, classification and evaluation provide useful information for the understanding of its different facets, hence their potentials and limitations for crop production. Such information is lacking in the general area of Kona-Jalingo in Taraba State, Nigeria, hence the study to determine the macro-morphological, physical and chemical properties of the soils, classify them up to th...

Apr, 2020 pp. 42-52

36

Research Article

Effect of Biochar on Available Phosphorus Status in Alfisols Derived from Charnockite in Ekiti State, Nigeria

Ilori, A. O. A.,^*, Shittu, O. S.,, Ayodele, O. J., Awe, G.O., Oso, A. O.

Biochar, a carbon-rich product of pyrolyzed biomass, has been used as an amend- ment to improve the properties of marginal highly-weathered soils in the tropics characterized by widespread phosphorus (P) deficiency. Alfisols derived from charnockite in Ekiti State are typically deficient in available phosphorus. Two alfisols from Ire-Ekiti and Ijan-Ekiti were amended with 0 (P-only), 5, 10 and 20%...

Apr, 2020 pp. 8-14

37

Research Article

Effect of Particle Size Biochar (rhizophora Racemose) of Red Mangrove on Bacteria Population in Crude Oil - Contaminated Soil.

Teknikio, Jemimah B.^*, Tate, Joseph O., Pureaziba, Nelson

Soils contaminated at different levels of crude oil were amended with two- particle-sized fractions of red mangrove biochar [ mm (B1) and 4 mm (B2)] from locally pyrolyzed red mangrove in earthen kiln and incorporated at five different rates (1, 2, 3, 4 and 6 mg ha-1) in the Teaching and Research Farm, Faculty of Agriculture, Niger Delta University, Bayelsa State, were assessed on the fate of bact...

Apr, 2020 pp. 1-7

38

Research Article

Biological Nitrogen Fixation and Productivity of Soybean in Maize - Soybean Intercrop Under Tillage and Bradyrhizobium Inoculation on Alfisols of Northern Guinea Savanna, Nigeria

Omeke, J. O.^*, Yusuf, A. A, Uyovbisere, O. E., Aliyu, I. A

A field study was conducted in the 2011 cropping season to investigate the effect of tillage and bradyrhizobium inoculation of soybean on biological nitrogen fixa- tion (BNF) and yield components in maize-soybean intercropping systems. Treat- ments comprised of two tillage practices (conventional tillage (CT) and reduced tillage (RT)) as the main plot and bradyrhizobium inoculation at four levels ...

Apr, 2020 pp. 15-24

39

Research Article

Restorative Effects of Amendments on Artificially Degraded Soils in the Southern Guinea Savanna of Nigeria

Adaikwu A.O^*, F. K. Salako, Busari M. A., Jamiu Oladipupo Azeez

An evaluation of the productivity of degraded alfisols at Makurdi and Otobi, Nigeria, using artificial desurfacing techniques (ADT) was carried out in 2012 and 2013 cropping seasons. The study was a split-split plot experiment arranged in a Randomized Complete Block Design with three replications. The soil was desurfaced at 0 – 5, 0 – 10, 0 – 15, 0 – 20 cm and the undesurfaced soil, 0 cm (control)...

Apr, 2020 pp. 124-132

40

Research Article

Genotypic Effect of Groundnut on Nodulation, N Fixation and N Balance in the Two Savannahs of Nigeria

Moji K.T^*, Jibrin M. J., Umar F. G., Abubakar U. D

Identification of high N-fixing groundnut genotypes and integrating them into 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. T...

Apr, 2020 pp. 25-35

41

Research Article

Micronutrient Distribution in Soils of Ethiope Region of Delta State, Nigeria

Ojobor, Smart. A.^*

Investigation was carried out in Ethiope Region of Delta state, Nigeria to evalu- ate the distribution of micronutrients contents of oxisols. Ten farming communi- ties were purposely selected in the region, and a total of 60 composite samples were collected with the aid of augers at a depth of 0 - 30 cm. The samples were air-dried at room temperature, sieved with 2 mm sieve mess before subjecting ...

Apr, 2020 pp. 70-76

42

Research Article

Effect of Nypa Fruticans Pruning Regime and Soil Properties on Regeneration of Mangrove Species (rhizophora Racemosa) in Eastern Obolo, Akwa Ibom State

Ogban P. I.^*, Ebong, U. P, Dickson, U. S

The study was conducted to evaluate the effect of Nypa fruticans pruning regimes on the regeneration of mangrove (Rhizophora racemosa) at Okorombokho in Eastern Obolo, Akwa Ibom State, Nigeria. The Nypa was pruned at a uniform height of 10 cm and the area protected with used fishing nets against infiltration by Nypa seeds in tidal floods. Mangrove plants of similar height were inter-planted among ...

Apr, 2020 pp. 82-91

43

Research Article

Vegetative Growth and Yield Response of Amaranthus Hybridus to Mycorrhizal Fungi (glomus Mosseae) Inoculation, Organic and Micronutrient Fertilizer Application

Edosa, Ifeyinwa Valerie1^*, Ogbemudia, Imasuen E. E, Yaqub A. E, Ogboghodo, I. A

This study was carried out at the Faculty of Agriculture Teaching and Research farm, University of Benin during the early planting season in April 2016 to evaluate the growth response of Amaranthus hybridus and some soil physical and chemical properties as influenced by organic and micronutrient fertilizers, mycorrhizal inoculum. In this experiment four treatments (poultry manure + cow dung + pig ...

Apr, 2020 pp. 36-41

44

Research Article

Soil Organic Carbon Fractions and Aggregation of a Tropical Alfisol as Affected by Plant Residues

ADESODUN Johnson Kayode^*, Udom B. E., Abudu O. S., Adejuyigbe C. O.,, Enikuomehin O. A, Thannia B. M, Oke O. O., Olowokere F. A., Oyegoke, C.O,, Mbila M.

Incorporation of plant residues into soil plays a vital role in enhancing the quality of fragile tropical soils. This study evaluated the short-term effect of plant residues of different quality on organic carbon (OC) fractions, carbon management indices and stability of a sandy loam soil with low (< 2%) initial OC content. The residues are Banana clippings (BC), Chromolaena odorata (CO), Leucaena...

Apr, 2020 pp. 92-101