Irrigation capability evaluation of Illushi floodplain,Edo State,Nigeria

作     者：A.S.Umweni A.O.Ogunkunle 

作者机构：Edo State UniversityEkpomaEdo StateNigeria Professor of Soil survey and ClassificationUniversity of IbadanIbadanNigeria 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2014年第2卷第2期

页      面：79-87页

学科分类：0710[理学-生物学] 0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0901[农学-作物学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

主　　题：Irrigation capability Water analysis Floodplain Edo State Nigeria 

摘      要：Many irrigation projects,especially in the developing tropical regions,are embarked upon without any land capability assessment,resulting in avoidable and undesirable ecological *** aim of this study is to assess the irrigation capability potentials of the soils of a rice growing Illushi/Ega community in Edo State of *** of Illushi/Ega(200 ha)were studied to establish their irrigation *** samples were collected from the rivers within and near the sites at the proposed points of intake structures and analyzed for salinity(ECw),permeability(SAR)and ion toxicity[Chlorine(Cl)and Boron(B)].Gravity irrigation suitability assessment was carried out following the guidelines of the United States Bureau for Land Reclamation(USBR,1953)and FAO(1979).Results showed that about 5.5%of the land was non-irrigable,11.5%was marginally irrigable,30.5%was moderately irrigable and 52.5%highly *** about 83%of the total land area was found to be *** results of analyses of irrigation water[ECw,SAR and Cl and B(ion toxicity)problems in water sources were 0.1-0.7 dS m^(-1),1.2-1.7,0.6-1.8 cmol kg^(-1) and 0.5-0.7 mg kg^(-1)]also show that there is no indication of salinity or ion toxicity problem.