J. Bio. Env. Sci.2( 2), 38-44, February 2012
Field experiments were conducted from July to October during 2009 and 2010 cropping seasons at the Research Farm, University of Agriculture, Makurdi, Nigeria, to evaluate the yield and yield components of maize and okra in mixture and to assess the advantages of the intercropping system. The three cropping systems (sole maize, sole okra and the intercrop of maize and okra) constituted the treatments, which were laid out in a randomized complete block design with four replications. Results of study showed that maize yield was not significantly affected by intercropping with okra. However, intercrop okra yield was significantly (P≤0.05) depressed by 24.5 % and 25.9 % respectively, in 2009 and 2010 compared to monocropped okra. Total intercrop yield was greater than the component crop yield, either planted as sole or in mixture. Intercropping okra and maize gave land equivalent ratio (LER) values of 1.84 and 1.80 respectively, for years 2009 and 2010, indicating that higher productivity per unit area was achieved by growing the two crops together than by growing them separately. With these LER values, 45.7 % and 44.4 % of land was saved respectively, in 2009 and 2010, which could be used for other agricultural purposes. In addition, maize was about three-fifths (3/5) as competitive as okra, indicating that both crops are complimentary and suitable in mixture.
Barhom TIH. 2001. Studies on water requirements for some crops under different cropping systems. M.Sc Thesis, Faculty of Agriculture, Cairo University.
Ekpete DM. 2000. Analysis of responses to fertilizer by intercrops. Nigerian Agricultural Journal 13, 96-102.
Enwezor WOE, Udo J, Ajotade KA. 1989. Fertilizer procurement and distribution. Fertilizer use and management practice for crops in Nigeria. Savenda Publishers, Nsukka, Nigeria. p. 25-28.
Gilley JE, Kramer LV. Eghball B. 2002. Managing runoff following manure application. Journal of soil water conservation 57, 530-533.
Gondwe WT. 1992. Evaluation of yield and yield components of maize, beans and potato in a three crop intercropping system at low soil nitrogen. Ph.D. Thesis, Cornell University, Ithaca, New York, USA.
Ijoyah MO, Kalu BA. 2003. Effects of seedbed types on yield of maize (Zea mays) in a tropical Guinea savanna location, Nigeria Journal of Sustainable Tropical Agriculture Research 5, 6-9.
Ijoyah MO, Atanu SO, Ojo S. 2010. Productivity of okra (Abelmoschus esculentus L. Moench) at varying sowing dates in Makurdi, Nigeria. Journal of Applied Biosciences 32, 2015-2019.
Ijoyah MO. 2011. Yield effects of intercropping white guinea yam (Dioscoreae rotundata P.) minisetts and maize (Zea mays L.) in the southern guinea savanna of Nigeria. African Journal of Agricultural Research 6(23), 5227-5231.
Ijoyah MO, Jimba J. 2011. Effects of planting methods, planting dates and intercropping systems on sweet potato-okra yields in Makurdi, Nigeria. Agricultural Science Research Journal 1(8), 184-190.
Madu FO, Nwosu SK. 2001. Effect of fertilizer and time of interplanting maize on the performance of yam-maize intercrop. Proceedings of the second annual farming systems research and extension workshop in Southern Eastern Nigeria, Umudike, January 10-14, 2001, p. 27-30.
Moniruzzaman M, Uddin MZ, Choudhury AK. 2007. Response of okra seed crop to sowing time and plant spacing in South Eastern hilly region of Bangladesh. Bangladesh Journal of Agricultural Research 32(3), 393-402.
Norman JC. 1992. Tropical vegetable crops, Arthur H. Stockwell Ltd. Elms Court, Illfracomb Devon.
Ofosu-Anim, J, Limbani NV. 2007. Effect of intercropping on the growth and yield of cucumber (Cucumis sativus L.) and okra (Abelmoschus esculentus L. Moench). International Journal Agriculture and Biology 9(4), 594-597.
Ogindo HO, Walker S. 2005. Comparison of measured changes in seasonal soil water content by rained maize-bean intercrop and component cropping in semi arid region. South Phy. Chem. Earth 30, 799-808.
Ramert B. 2002. The use of mixed species cropping to manage pests and diseases- Theory and Practice, UK. Organic Research 2002. Proceedings of the COR Conference, Aberystwyth.
Steel RGD, Torrie JH. 1980. Principles and procedures of statistics. A Biometrical Approach, 2nd edition, McGraw-Hill Book Company, Inc. New York, p. 633.
Unamma UP. 1999. Effect of time of interplanting maize on the performance of yam-maize intercrop. Annual farming systems research, Umudike. February 12-15, 2000, p. 40-45.
Usman SD. 2001. Seed production and quality of okra as affected by sowing time. Seed Research 29(1), 47-51.
Willey RW. 1985. Evaluation and presentation of intercropping advantages. Expl. Agric 21, 119-133.
Willey RW, Rao MR. 1980. A competitive ratio for quantifying competition between
Wolfe MS. 2000. Crop strength through diversity. Nat 406, 681-682.
Wuhua TAT. 1985. Effects of melon population density on intercropped maize and melon Expl. Agric 16, 117-125.