1069, Maiduguri, Nigeria. 2 Department of Agronomy, Faculty of Agriculture and Forestry, University of Ibadan, Ibadan Nigeria.

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1 UNIVERSITY OF MAIDUGURI RESEARCH COMPENDIUM (/unpublished) Fertility and Suitability Evaluation of Some Selected Sites Within the Great Green Wall (GGW) Corridor of Jigawa State, Nigeria For Sustainable Tree Crop Production I. Adamu 1 *, A. M. Chiroma 1 and J. R. Orimoloye 2 1 Department of Soil Science, University of Maiduguri, PMB 1069, Maiduguri, Nigeria. 2 Department of Agronomy, Faculty of Agriculture and Forestry, University of Ibadan, Ibadan Nigeria iadurkwa@gmail.com Journal of Arid Agriculture. Special Issue, 2017, pp by Faculty of Agriculture, University of Maiduguri, Nigeria. Year of Publication 2017 Source of funding Federal Ministry of Environment A baseline survey was conducted in some selected areas of Jigawa State to evaluate the potential and suitability of the soils and their sustainable management for some selected tree crops. Soil investigations were carried out in eleven (11) participating communities spread across six (6) Local Government Areas within the State with a view to generating baseline information on soil resources of the areas. Soil samples were collected from the surface (0-30cm) soil depth within the Great Green Wall Initiative Corridor (GGW) for physical and chemical analysis. Sampling was carried out along ten kilometer (10km) lengths transect at interval of one kilometer (1km) in each participating community using auger. Soil samples were analyzed following standard analytical procedures. Land Suitability Evaluation was done following the approach by FAO framework for forestry used in the study for assessment of physical suitability of the land for specified kind of uses. The results for land suitability assessment for growing mango and cashew on soils from the sites of the study area revealed that soils in Gumel/Zuge, Gumel/BarikinFaka and Babura/Muni, falls within the suitability class of (S3) which are all rated marginally suitable for production of mango and cashew, because of their very low fertility status and organic matter content. The remaining eight (8) sites were rated Not Suitable (NS) for production of either mango or cashew. For possible establishment of the proposed tree species, those sites rated as Marginally Suitable (S3) and Not Suitable (NS) may also support the establishment of the desired tree crops if special care is taken, but with capital intensive in terms of water, fertilization, and amendments which may not be practical. 1

2 Research Impacts (/unpublished) Land Suitability Evaluation for Rain-Fed Crop Production of Some Selected Soils in Konduga LGA of Borno State *1 Adamu, I., 2 Orimoloye, J.R. and 1 Buji, I.B 1 Department of Soil Science, University of Maiduguri, PMB 1069, Maiduguri, Nigeria. 2 Department of Agronomy, Faculty of Agriculture and Forestry, University of Ibadan, Ibadan Nigeria iadurkwa@gmail.com Year of Publication 2017 Source of funding Individual Continental Journal for Sustainable Development. Vol. 8 (2)8-23. by Science and Education Development Institute, Nigeria This study describes a Land Suitability Evaluation Survey of selected site at Limanti Chobbol about 1km South of Sharmantari Village, Konduga LGA, Borno State. Free survey method was adopted during the course of the study, soil survey of the area was carried out on the basis of field investigation with no rigid pattern of soil observation, and changes in field features like vegetation, colour, texture, and land use pattern of the area were used to establish sampling points. Representative soil samples for laboratory analysis were collected by means of auger at a depth of 0-30cm, only surface soils were sampled and a total of nine (9) soil samples were collected for the analysis. The principles and methods given in the Framework for Land Evaluation by means of land suitability classification was adopted for the evaluation of the study area which was "qualitative classification", in which the relative suitability of different land units recognized and mapped are expressed in qualitative terms only. Results for land suitability evaluation shows that mapping unit A3, A5, A6, A7 and A9, are considered to be highly suitable for soyabean, groundnut, cowpea, sesame, rice and onion provided sufficient moisture is provided. Mapping unit A1, A2, A4 and A8 are found to be moderately suitable for soyabean, groundnut, cowpea, sesame, rice and onion due to low inherent fertility as observed in the units but could still be put into cultivation for optimum yield if proper measure will be adopted as recommended. For the immediate future, it is suggested that 2

3 Research Impacts preference be given to 'natural' methods of restoring soil fertility, such as crop rotations with an adequate fallow period, cultivation of leguminous crop as sole or in association with cereal, application of crop residues and farmyard manures where possible. Comparative analysis and evaluation of some pedons of sedimentary parent materials in south-western Nigeria for crop production (/unpublished) *1 Adamu I., 2 Akinbola G. E., 2 Orimoloye J. R. and 1 Buji I. B. 1 Department of Soil Science, Faculty of Agriculture, University of Maiduguri, P.M.B 1069, Maiduguri, Borno State, Nigeria 2 Department of Agronomy, Faculty of Agriculture and Forestry, University of Ibadan, Ibadan Nigeria iadurkwa@yahoo.com Year of Publication 2017 Source of funding University of Maiduguri Merit Research Journal of Agricultural Science and Soil Sciences. Vol. 5(7) pp A comparative analysis of some pedons formed on sedimentary parent materials in south-western Nigeria was made, and their potential for crop production was evaluated. Three locations (Eggua, Papalanto and Esan) were surveyed and sampled for the experiment. Three physiographic positions (Upper, Middle and Lower Slopes) were identified and soil sample was collected at the depth of 0-30cm and 30-60cm for each physiographic position for physical and chemical analysis. Descriptive statistical analysis was also carried out to evaluate measure of dispersion and mean for all variables. The variability of soil properties were measured by estimating the percentage coefficient of variation (%CV). The results of the study revealed that ph in water, ph in KCl, BS and BD had the least variation when compared with Na, ECEC and sand which showed low to 3

4 Research Impacts moderate variation and TN, OC, P, Ca, Mg, K, Fe, Mn, Cu, Zn, silt and clay, which shows low, moderate, high to very high variation. Also results from the analysis of variance also show that landscape positions have significant (P 0.05) effects on P, Fe, Mn, Cu, Zn, BS, Mg, Na, ECEC and silt, whereas, TN, OC, Ca, K, ph in water, ph in KCl, sand, clay and BD were not significantly (P 0.05) influenced by physiographic positions. Soil depth did not significantly (P 0.05) affect the availability, distribution and concentration of TN, P, Fe, Mn, Cu, Zn, BS, Ca, Mg, K, Na, ECEC, sand and silt. Significant (P 0.05) differences in OC, ph in water, ph in KCl, Clay and BD were observed with soil depth in all the three location. Results from Land Capability Classification shown that all the pedons in the three location falls under the Capability Class of II (moderately suitable) with limitations of fertility, erosion, and low moisture content, which make them capable for sustainable crop production with improve management practices. (/unpublished ) Variation in Physico-Chemical Properties of Some Pedons of Sedimentary Parent Materials as Affected by Landscape Position and Depth. 1 Adamu*, I., 1 Buji, I.B., 1 Makinta, G., and 1 Waniyo, U.U. 1 Department of Soil Science, Faculty of Agriculture, University of Maiduguri, P.M.B 1069, Maiduguri, Borno State, Nigeria iadurkwa@yahoo.com Year of Publication 2016 Source of funding University of Maiduguri Elixir International Journal of Agriculture. 93: Available online at A variability analysis of some pedons formed on sedimentary parent materials in south-western Nigeria was made, and their potential for sustainable crop productivity was evaluated. Three locations (Eggua, Esan and Papalanto) were surveyed and sampled for the experiment. Three landscape positions (Upper, Middle and Lower Slopes) were identified and soil sample was 4

5 Research Impacts collected at the depth of 0-30cm and 30-60cm for each landscape position for physical and chemical analysis in each of the location. Data collected were subjected to 2-Way Analysis of Variance arranged in a randomized completely block design with Location, landscape position and soil depth as factors and soil physical and chemical properties as variables. Significantly different means were separated using LSD at (P 0.05) level of probability. Descriptive statistical analysis was also carried out to evaluate measure of dispersion and mean for all variables. The variability of soil properties within and among pedons was measured by estimating the percentage coefficient of variation (%CV). The results of this study revealed that ph in water, ph in KCl, BS and BD had the least variation when compared with Na, ECEC and sand which showed low to moderate variation and TN, OC, P, Ca, Mg, K, Fe, Mn, Cu, Zn, silt and clay which shows low, moderate, high to very high variation. Also results from the analysis of variance also show that landscape positions have significant (P 0.05) effects on P, Fe, Mn, Cu, Zn, BS, Mg, Na, ECEC and silt, whereas, TN, OC, Ca, K, ph in water, ph in KCl, sand, clay and BD were not significantly influenced by landscape positions. Soil depth did not significantly (P 0.05) affect the availability, distribution and concentration of TN, P, Fe, Mn, Cu, Zn, BS, Ca, Mg, K, Na, ECEC, sand and silt. Significant (P 0.05) differences in OC, ph in water, ph in KCl, Clay and BD were observed with soil depth in all the three locations investigated. (/unpublished ) Rhizosphere Bacterial Population in Four Plant Species R. Abdullahi 1*, I. Adamu 1 and H. H. Sheriff 2 1 Department of Soil Science, Faculty of Agriculture, University of Maiduguri, P.M.B 1069, Maiduguri, Borno State, Nigeria 2 Lake Chad Research Institute Maiduguri, Maiduguri, Borno State, Nigeria rakiyaabdullahi064@gmail.com Journal of Arid Agriculture. Special Issue, 2017, pp by Faculty of Agriculture, University of Maiduguri, Nigeria. 5

6 Year of Publication 2017 Source of funding individual This present work was conducted at University of Maiduguri Teaching and Research Farm to determine rhizosphere effect of four plant species (Citrus, mango, pawpaw and cashew) on bacterial population. Rhizospheric soils under the four plant species were sampled along with bulk soil from the study site. the soil to of the study area was well drained sandy loam. Results from the bulk soil indicated lower values for moisture content, organic matter and ph compared to rhizospheric soils under the four plant species. Cashew plant significantly (p<0.05) recorded higher values for moisture content (19.0%), % OM (1.2%) and ph (6.97) and least were recorded in soil under citrus. Microbial population was significantly (p<0.05) higher in Rhizosphere soils compared to bulk soil. However, cashew recorded significantly (p<0.05) higher values compared to other plant species. Significant number of CFUs of bacteria and actinomycetes were recorded under cashew (147.5; 42.3 CFUs/g dry soil), while citrus recorded the lowest counts. Conversely, the number of actinomycetes CFUs did not vary significantly (p<0.05) among citrus, mango and pawpaw. There was a strong positive correlation between % OM, moisture content, ph and CFUs of bacteria and actinomycetes in rhizosphere of all the four plant. It could be concluded that, the changes in soil microbial population is mainly influenced by the plant species effect. Evidently, the four plant species considered in this study have altered the soil properties and the microbial population differently. Among the four different plants, cashew harbours rich bacterial and actinomycetes populations due to the availability of optimum ph, high moisture, and organic matter content and showed superior rhizospheric effect in modifying soil properties compared to mango, pawpaw, and citrus. Research Impacts Researchers Address(s) Characterization of Selected Valley Bottom Soils in University of Ibadan, Ibadan Nigeria. I.B. Buji 1, B.N. Okafor 2, I. Adamu 1 and G.E. Akinbola 3 1 Department of Soil Science, Faculty of Agriculture, University of Maiduguri, P.M.B 1069, Maiduguri, Borno State, Nigeria. 2 Citrus Research Programme, National Horticultural Research Institute, Idi Ishin Ibadan, Nigeria. 3 Department of Agronomy, Faculty of Agriculture and Forestry, University of Ibadan, Ibadan Nigeria ibrahimbuji84@gmail.com 6

7 (/unpublishe d) Year of Publication 2017 Source of funding University of Maiduguri Research Impacts Journal of Agriculture and Environment Vol. 13 No. 2, 2017: ISSN X A Study was conducted to characterize and determine the potentials of valley bottom soils at University of Ibadan, South Western Nigeria. Soil survey was carried out using rigid grid method where three soil types were identified as Jago series, Matako series and Matako series browner variation, soil samples were collected from genetic horizons and were subjected to laboratory analysis using standard procedure. The soils were characterized based on their physical and chemical properties. The soil texture ranged from sandy loam to loamy sand. Saturated hydraulic conductivity (Ks) in Jago series ranged from to cm/hr; for Matako series it ranged from to cm/hr and for Matako series (browner variation) it was from to cm/hr. Bulk density for Jago and Matako soil series, increased with soil depth while for Matako series browner variation it fluctuates across the profile. Jago soil series showed neutral (6.58) ph (H2O), while Matako series had 6.36 and Matako (browner variation) had 6.48 which are slightly acidic. Organic carbon (OC) content, were all high in the series with Jago having (8.22 g/kg) while Matako series had (16.36 g/kg) and Matako (browner variation) had (17.13 g/kg). Total Nitrogen (TN) content was low for all soil series (0.50 g/kg) for both Jago and matako series, Matako series (browner variation) had (0.95g/kg). Available Phosphorous (P), Potassium (K), and Base Saturation (BS), for Jago series had values of 27.5 mg/kg, 1.05 cmol/kg, %; Matako series had mg/kg, 0.7 cmol/kg, %, and Matako series (browner variation) had mg/kg, 1.20 cmol/kg, %, respectively. The soils were generally very deep with no evidence of rock outcrops and are imperfectly to poorly drained due to the high water table, therefore, there is need for good drainage to harness the potentials and utilization for crop production and other uses. 7

8 (/unpublished) Mineral composition of maize (Zea mays L.) in response to neem seed crush blended urea in a sandy loam of Maiduguri, Nigeria. 1 Makinta, G., 1 Kwari, J. D., 1Ngala, A. L., 1 Buji, I. B., and 1 Adamu, I. 2 Department of Soil Science, Faculty of Agriculture, University of Maiduguri. Year of Publication 2015 Source of funding Individual Research Impacts International Journal of Innovative Research in Technology & Science. Vol 3(6) Pp A field experiment was conducted in a sandy loam (Typic Ustipsamment) at the University of Maiduguri Faculty of Agriculture Teaching and Research Farm to determine the effect of neem (Azadirachta indica, J.) seed crush blended urea on the nutrient concentration and uptake by maize. The experiment was a 4 x 3 factorial, laid out in a randomized complete block design with three replicates. The factors and treatments comprised four levels of nitrogen (0, 50, 100 and 150 kg N/ha) in form of urea and three levels of neem seed crush (0, 15 and 30% by weight of urea-n applied). The results indicated that fertilizer N singularly or in combination with neem seed crush (NSC) significantly influenced the concentration and uptake of N, P, K and Ca both in maize grain and stover. However, Magnesium was not significantly affected by treatment combinations both in maize grain and stover. NSC treatment levels did not significantly affect mineral accumulation both in maize grain and stover. The highest nutrient accumulation and uptake by maize were recorded by the treatment combination of 150 kg N/ha and NSC at 30% by weight of urea-n used. The results generally indicated that nitrification inhibitory properties of the neem material enhanced nutrient concentration and uptake in maize crop resulting in better dry matter accumulation. 8

9 (/unpublished) Classification of Some Valley Bottom Soils in University of Ibadan I.B. Buji 1, Okafor B.N 2, I. Adamu1, M.J. Magaji 3, N.G. Hayatu 4 1 Department of Soil Science, Faculty of Agriculture, University of Maiduguri, P.M.B 1069, Maiduguri, Borno State, Nigeria 2Department of Citrus, National Horticultural Research Institute, Ibadan, Nigeria 3Department of Agronomy, Bayero University of Kano, Gwarzo Rd, Kano, Nigeria 4Department of Soil Science, Usmanu Dan Fodiyo University, Sokoto, Nigeria ibrahimbuji84@gmail.com Year of Publication 2017 Source of funding University of Maiduguri Research Impacts Scholars Journal of Agriculture and Veterinary Sciences. Vol. 4(12) Pp Wetland soils are very abundant in Nigeria, but due to poor understanding of their nature and properties, there is underutilization of these soils in Nigeria. Therefore, a detailed survey was carried out to classify some wetland soils in the Valley bottom of the University of Ibadan. Soil survey was conducted using rigid grid method; soil samples collected from genetic horizons were subjected to laboratory analysis using standard procedure. The soils were classified using the local system (Smyth and Montgomery 1962) at the lower level, while at the higher level using USDA Soil Taxonomy (2010) Soil Survey Staff, and World Reference Base for soil Resources (WRB, 2006) systems. Three soil types were identified from the study area. These include Jago Series (Smyth and Montgomery 1962); Fluventic Eutrudept (USDA Soil Taxonomy, 2010), Fluvic Gleysol (WRB 2006); Matako Series (Smyth and Montgomery 1962), Fluventic Eutrudept (USDA Soil Taxonomy, 2010), Fluvic Cambisol Eutric (WRB 2006); and Matako series browner variation (Smyth and Montgomery 1962), Fluventic Eutrudept(USDA Soil Taxonomy 2010), Fluvic Cambisol chromic (WRB 2006);. The soils are young, poorly drained and susceptible to flooding. Drainage and good soil fertility programme will be useful in managing the soils for increased productivity and crop yield. 9

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