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Influence of Cassava and Turmeric Intercropping System on Phytosociology of Predominant Weeds in Calabar

O. C. Umunnakwe
F. A. Nwagwu
T. O. Ojikpong
E. A. Awelewa
B. O. Ebri


An experiment was conducted in 2020 and 2021 cropping seasons at the Department of Crop Science Teaching and Research Farm, University of Calabar, to identify the predominant weeds in the farming area and assess how cassava/turmeric intercropping system affects their relative density, relative frequency and relative abundance. The experiment was laid out in a randomized complete block design (RCBD) and replicated three times. There were seven treatments, sole cassava, sole turmeric, and cassava intercropped with turmeric at 66,666, 50,000, 40,000, 35,714, and 28,571turmericc plants/ha. Data were collected on weed's phytosociological attributes every four weeks. Ageratum conyzoides L., Aspillia bussei O. Hoff, Caladium bicolor Vent., Calapogonium mucunoides Desv., Cleome rutidosperma DC., Euphorbia heterophylla L., Gloriosa superba L., Ipomoea involuncrata P., Mitracarpos villosus DC., Oldenladia. Herbacea L., Phyllantus amarus Schum., Triumfeta rhomboidea Jacq., Axonopus compressus Beav., Cynodon dactylon L., Eragrostis ciliaris L., Panicum maximum Jacq., Kyllinga bulbosa Beav. and Kyllinga erecta Schum. were the predominant weeds identified in the experimental area. A. bussei, A. conyzoides, M. villosus and E. heterophylla were relatively lower at higher turmeric density of 50,000 to 66,666 plants/ha in the intercrop mixture while Axonopus compressus, Caladium bicolor, Cynodon dactylon, Gloriosa superba, Kyllinga bulbosa, Kyllinga erecta, Calapogonium mucunoides Triumfeta rhomboidea and Panicum maximum were higher.