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Dr. John Okokoh Shiyam

Associate Professor
Crop Science
johnshiyam@unical.edu.ng

Dr John Okokoh Shiyam is an Associate Professor in the Department of Crop Science, University of Calabar, Nigeria. He obtained a B. Sc (Crop Science) degree and a Masters degree in Agronomy from the prestigious University of Calabar, Nigeria in1991 and Year 2000, respectively. He also obtained a PhD in Agronomy from the Federal University of Technology Owerri, Imo State Nigeria. He was employed as a Graduate Assistant in the Department of Crop Science, University of Calabar in 1995, and rose through the ranks to Associate Professor in 2014, Dr Shiyam is a member of several professional bodies including the Agricultural Society of Nigeria (ASN), Crop Science Society of Nigeria (CSSN), Soli Science Society of Nigeria (SSSN)   and Organic Agriculture Project in Tertiary Institutions in Nigeria (OAPTIN). He has attended presented well researched papers in different conferences and other academic fora. He has successfully supervised many Ph.D and M.Sc students as well as several Post Graduate Diploma students. He has forty-five  articles high quality local and international journal to his credit. Dr Shiyam has held several administrative and academic positions including Sub-Dean Faculty of Agriculture, Forestry and Wildlife Resources Management from 2008-2010, Head, Department of Crop Science (2010-2012). He is currently the Chairman of the Faculty Graduate Committee as well as the Graduate School Board   coordinating the Faculty of Agriculture, Forestry and Wildlife Resources Management and Faculty of Oceanography. Dr Shiyam’s current research interest is focused on organic agriculture, Climate change and agriculture as well as the agronomy of neglected and underutilized native crop plants. 

Oko, B.F.D; Shiyam, J.O.; Eneji A.E.; Hona, T.; and Yamatoto, S. (2000). Yield of selected food crops under alley – cropping with some hedgerow species in humid tropical Southeastern Nigeria. Jpn. J. Trop.Agr.44(3):167 – 170 (Indexed/abstracted in Scopus)(ASIA).


Oko, B.F.D; Eremi, E. Nwoko C and Shiyam J.O. (2001). Performance of vegetable cowpea (Vigna unguiculata L. Walp) as influence by Phosphorus fertilizer in S.E Nigeria. Acta Agronomica Hungarica, 49 (3) : 305 – 309 (Indexed/abstracted in Scopus)(EUROPE)


Shiyam, J.O.; Oko, B.F.D. and Binang, W.D (2004). Productivity of false horn plantain intercropped with cowpea and maize in Southeastern Nigeria. INFOMUSA, 13 (1) : 18-20(Indexed/abstracted in Google Scholar) (EUROPE)


Shiyam, J.O.; Oko, B.F.D.; Ojating, I. and Uko, A.E. (2006). Germination, Growth and Pruning yield of some hedgerow species and their effects on weed growth and performance of cooking Banana Musa spp.CV ABB). UNISWA Res. J. Agric.Sci.and Tech. 9 (1) : 53-56. (Indexed/abstracted in Google Scholar)(AFRICA)


Shiyam, J.O.; M.O. Eyong; A.E. Uko; W.B. Binang and I. Ojating (2007). Relative soli fertility improvement efficiency of selected woody species grown on an Utisol in Calabar, Nigeria. UNISWA Res. J. Agric.Sci.and Tech. 10 (1) : 37-40. (Indexed/abstracted in Google Scholar)(AFRICA)


Shiyam, J.O.; I. Ojating; W.B. Binang; A.E. Uko and M.O. Eyong (2008). Impact of the mulch production system on soil chemical changes and Agronomic performance of Plantain (Musa AAB) in a rainforest zone. UNISWA J. Agric.Sci.and Tech. 11(1): 51-56 (AFRICA).


Shiyam, J. O.(2009). Response of plant and ratoon crops plantain to K2O fertilizer in the tropical rainforest zone of Nigeria. Trop. Agric.(Trinidad) 86 (3): 103-107 (Indexed/abstracted in Scopus) (SOUTH AMERICA)


Uko, A.E; Udo,I.A and Shiyam, J.O. (2009). Optimizing poultry manure rates for two okra (Abelmoschus esculentus) varieties in a warm wet climate. Journal of Agriculture, Biotechnology and Ecology, 2(3): 273 - 285(Indexed/abstracted in Google Scholar)(ASIA).


Shiyam, J. O. and Inyang-Abia, M. E. (2010). A Survey of Attitudes of Secondary School Students towards Agricultural Science education. Journal of Agricultural Research and Policies 5(4): 34-37 (AFRICA)


Shiyam, J. O. (2010). Growth and yield response of groundnut (Arachis hypogaea L.) to plant densities and phosphorus on an Ultisol in southeastern Nigeria.Libyan Agric. Res. Cen. J. Intl. 1(4): 211-214. (Indexed/abstracted in Google Scholar)(AFRICA).


Shiyam, J. O. and Binang, W. B. (2011). Effects of Poultry manure and Urea-N on flowering occurrence and leaf productivity of Amaranthus cruentus (L). J. Appl. Sci. Environ. Manage. 15 (1): 13-15. (Indexed/abstracted in Google Scholar) (AFRICA).


Binang, W. B: Okpara, D. A. Shiyam, J. O. and Ntia, J.D. (2010). Evaluation of cultivar inter-planting ratio on productivity of rice/rice system. Research Journal of Agriculture and Biological Sciences 6(6):1055-1059. (Indexed/abstracted in Scopus, ISI, DOAJ) (EUROPE)


Shiyam, J.O; Oko, B.F.D; Obiefuna, J.C and Ofoh, M.C. (2010). Optimizing the productivity of plantain/cocoyam mixture by mulching and fertilizer application. World J. Fungal and Plant Biol., 1(2):42-45 (Indexed/abstracted in Google Scholar, IDOSI, Index Copernicus) (ASIA).


Binang, W. B: Okpara, D. A. Ntia, J.D. and Shiyam, J. O. (2010). Spatial and temporary deployment of cultivars effects on rice cultivar mixtures. Research Journal of Agriculture and Biological Sciences 6(6): 1099-1102. (Indexed/Abstracted in ISI, Scopus, DOAJ) (EUROPE)


Shiyam, J. O; Obiefuna, J. C; Ofoh, M. C, and Oko, B. F. D. (2011). Effect of sawdust mulch and fertilizer on weed flora composition and growth in plantain/cocoyam Intercrop in the Nigerian rainforest zone. World J. Agric. Sci. 7 (5): 629-632 (Indexed/abstracted in Google Scholar, IDOSI, Index Copernicus, DOJA, EBSCO, CABI) (ASIA).


Binang, W.B; Ntia, J.D and Shiyam, J.O. (2012). Genotype and seeding date effect on performance of Mangrove rice (Oryza sativa L.) in the Cross River Estuary. J. Agron., 11: 79 – 84 (ASCI-Database, CABI, Cambridge Scientific Abstract, DOAJ, FSTA, Google Scholar, SCIMAGO, Scopus) (NORTH AMERICA)


Binang, W.B; Shiyam, J.O and Ntia, J.D. (2012). Effect of seed priming method on agronomic performance and cost effectiveness of rainfed, dry-seeded NERICA rice. Res. J. Seed Sci; 5(4) : 136 – 143 (Indexed/abstracted in Scopus, Gooogle Scholar, ASCI-Database, SCIMAGO) (NORTH AMERICA) .


Binang, W.B; Shiyam, J.O and Ittah, M.A. and Uko, A.E. (2013). Rice (Oryza sativa L.) productivity response to depth of tillage and soil amendment in iron-rich soils of Calabar, Nigeria. Agricultural Science Research Journal, 3 (7): 194 – 198 (Indexed/abstracted in Google Scholar) (ASIA).


Uko, A.E; Udo, I.A and Shiyam, J.O. (2013). Effect of poultry manure and plant spacing on the growth and yield of waterleaf (Talinum fructicosum (L.) Juss). J. Agron; 1 – 7 (Indexed/abstracted in Google Scholar) (NORTH AMERICA).


Shiyam, J. O. and Binang, W. B. (2013). Effect of poultry manure and plant population on productivity of fluted pumpkin (Telfaiaria occidentalis Hook F.) in Calabar, Nigeria. Journal of Organic Systems, 8(2): 29 – 35 (Indexed/abstracted in Google Scholar) (AUSTRALIA).


Shiyam, J. O; John, N.N; Ndaeyo, N.U and Binang, W. B. (2014). Effect of organo-mineral fertilizer on soil nutrient flux and maize (Zea mays L.) productivity on an Ultisol in southern Nigeria. International Journal of Research in Agricultural Sciences, 1(1): 1- 4 (Indexed/abstracted in Google Scholar) (ASIA).


Shiyam, J.O; Binang, W.B and Ittah, M.A. (2014). Evaluation of growth and yield attributes of Chinese hybrid rice (Oryza sativa L.) varieties in the coastal humid forest zone of Nigeria. IOSR Journal of Agriculture and Veterinary Science, 7 (2): 70 – 73 (Indexed/abstracted in Google Scholar, Index Copernicus, J-Gate, EBSCO HOST) (North America, ASIA, Australia).


Shiyam, J.O., Attoe, E.E., Undie, U.L. and Eyong, M.O. (2014). Effect of N-Enriched Goat Manure on Productivity of Telfairia/Amaranthus Mixture in Calabar. Australian Journal of Biology and Environmental Research 1(4) : 1 – 5 (Indexed/Abstracted in SCOPUS, CAB Abstract, Agricola)(AUSTRALIA)


Utietiang, L.U., Uwah, D.F., Shiyam, J.O. and Effa, E.B. (2015). Nutrient status and ameliorating effects of poultry droppings on soil and sustainable production of garden egg. Journal of Agriculture and sustainability, 7 (2) : 128 – 142 (Indexed/Abstracted in Google Scholar, CABS, ProQuest Agriculture Journals)( AUSTRALIA)


Binang W.B, Ansa J.E.O., Shiyam J.O., Ntia, J. D. and Ittah, M. A. (2016) Agronomic biofortification of Cassava (Manihot esculenta Crantz) as influenced by Rate and Time of Iodine Fertilization in Southeastern Nigeria. SCIREA Journal of Agriculture. 1(1): 50 – 65 (Indexed/Abstracted in Google Scholar)(ASIA, North America, Europe)


Shiyam, JO; Binang, WB and Obiefuna, JC (2016). Suckering and survival capacity of pineapple (annas comosus L. Merr) propagules in selected potting substrates. SCIREA Journal of Agriculture, 1(1)107 – 117 (Indexed/Abstracted in Google Scholar)(ASIA, North America, Europe)


Shiyam, J.O, Nkor, N.N, Binang, W.B and Effa, E.B. (2016). Yield response of bambara groundnut (Voandzeia subterrenea (L) Thours.) varieties to organomineral fertilizer in the coastal forest of Southeastern Nigeria, SCIREA Journal of Agriculture. 1(1):91 – 106 ((Indexed/Abstracted in Google Scholar)(ASIA, North America, Europe)


Ittah, M.A., Binang, W.B., Shiyam, J.O. and Idu, P.0. (2016). Genetic and Correlation Analyses of the Variation in Yield Traits in X-ray Irradiated Groundnut Mutants. SCIREA Journal of Agriculture, 4(1): 64 – 77 (Indexed/Abstracted in Google Scholar)(ASIA, North America, Europe)


Shiyam, J.O., Binang, W.B. and Stephen, G.E. (2016). Effect of Animal Manures on Soil Nutrients Repleshment and Performance of Okra (Abelmoschus esculentus (L.) Moench) grown on degraded sandy soil in Calabar, Nigeria, SCIREA Journal of Agriculture, 1(1): 20 - 31(Indexed/Abstracted in Google Scholar)(ASIA, North America, Europe)


Binang, W.B., Shiyam, J.O., Uko, A.E., Ntia, J.D., Okpara, D.A., Ojikpong, T.O., Ntun, O.E. and Ekeleme, F. (2016). Influence of gender and spacing on weed smothering potentials of fluted pumpkin (Telfaiaria occidentalis Hook F.) in Southeastern Nigeria, Journal of Applied Life Sciences International, 8(4):1 – 10 (Indexed/Abstracted in Google Scholar, CAS, HINARI)(USA, ASIA, EUROPE)


Garjila, J.A., Shiyam, J.O and Augustine, Y. (2017). Response of Jew’s mallow (Corchorus olitorius L.) to organic manures in the Southern Guinea Savanna agroecological zone of Nigeria. Asian Research Journal of Agriculture, 3(1) 1 – 6 (Indexed/Abstracted in Google Scholar, CAS, HINARI)( USA, ASIA, INDIA, EUROPE)


Shiyam, J.O, Garjila, Y.A. and Bobboyi, M. (2017). Effect of poultry manure on growth and yield of maize (Zea mays var Praecox) in Jalingo, Taraba State, Nigeria. Journal of Applied Life Sciences International, 10(4):1– 6 (Indexed/Abstracted in Google Scholar, CAS, HINARI)( USA, ASIA, EUROPE)


Garjila, Y.A., Shiyam, J.O. and John, R. (2017). Effect of cowdung compost manure rates of application on the growth and leaf yield of spider plant (Cleome gynandra L. Briq) in Jalingo, Taraba State, Nigeria. Effect of cowdung compost manure rates of application on the growth and leaf yield of spider plant (Cleome gynandra L. Briq) in Jalingo, Taraba State, Nigeria. Archives of Current Research International, 7(2):1 – 6 (Indexed/Abstracted in Google Scholar, CAS, HINARI)( USA, ASIA, EUROPE)


Shiyam, J.O., Attoe, E.E., Garjila, A.Y. and Assim-Ita, E.A. (2017). Evaluation of agronomic parameters of potted tomato (Lycopersicon esculentum (L) Mill) at different rates of poultry manure compost, Journal of Applied Life Sciences International, 10(4):1 – 5 (Indexed/Abstracted in Google Scholar, CAS, HINARI)( USA, ASIA, EUROPE)


Emosairue, S.O and Shiyam, J.O (2000). A compendium of insect pests and natural enemies associated with lowland rice in Southeastern Nigeria. Global Journal of Pure and Applied Sciences 6 (3) : 385-388 (Google Scholar, AJOL)(AFRICA).


Shiyam, J.O.; Binang, W.B. and Ibeawachi, I.I. (2001). Tillage methods and Potassium rates on growth and tuber yield of an exotic sweet potato (Ipomea batatas, L.) on Sandy Utisol in Southeastern Nigeria. African Journal of Science and Technology, 2 (1 and 2):142 – 146 (Indexed/abstracted in Google Scholar, AJOL, DOAJ)(AFRICA)


Shiyam, J.O.; Oko, B.F.D and Ojating, I. (2003). Growth performance of some Hedgerow species and their effects on the productivity of cooking Banana (Musa spp. AAB group; Cardaba) under an alley-cropping system. African Journal of Agricultural Research, (1 and 2) : 34 – 39 (Google Scholar, AJOL, SNIP, SCImago JR)(AFRICA).


Shiyam, J.O; Bello, O.S and Udo, I.A. (2009). Influence of soil fertility status on host response to black sigatoka and yield of plantain (Musa Spp. CV AAB) in southern Nigeria. Nigerian Journal of Horticultural Science (NJHS), 14 : 44 – 48 (Google Scholar, AJOL)(AFRICA)


Shiyam, J.O.; Uko,A.E and Ekanem, N.E (2007). Agronomic Evaluation of some elite cassava genotypes in the Rainforest Agroecology of Southeastern Nigeria. Continental J. Agronomy, 1:1 - 4. (Indexed/abstracted in Google Scholar, OAJI) (AFRICA).


Shiyam, J.O.; Obiefuna, J.C.; Oko, B.F.D and Uko, A.E (2007). Growth and corn yield response of upland Cocoyam (Xanthosoma saggittifolium L.) to Sawdust Mulch and NPK 20:10:10 fertilizer rates in the humid forst zone of Nigeria. Continental J. Agronomy 1: 5 -10.(Indexed/abstracted in Google Scholar)(Indexed/abstracted in Google Scholar, OAJI) (AFRICA).


Shiyam, J. O. and Inyang-Abia, M. E. (2010). A Survey of Attitudes of Secondary School Students Toward Agricultural Science Education. Journal of Agricultural Research and Policies 5(4): 34-37 (Google Scholar, Index Copernicus)(AFRICA)

No Results for Research Works done

Showing All Conferences Attended

The 50TH Annual Conference of the Agricultural Society of Nigeria held at the National Root Crops Research Institute.
Effect of KI rate on tuber yield and efficiency of iodine biofortification in selected elite cassava (Manihot esculenta L.) varieties grown on coastal sand in Calabar, Nigeria.
Start: Monday 3rd October, 2016
End: Friday 7th October, 2016
1st National Conference on Organic Agriculture, UNABB.
Indigenous agricultural and household waste management: farmers’ perception and training for regenerative agriculture in southeastern Nigeria. Abeokuta, Nigeria.
Start: Tuesday 25th October, 2005
End: Friday 28th October, 2005
No Results for Grants/Awards Received