Leaching requirements for salt-affected soils of West Nubian valley of Nile River (North Sudan)

Abstract

This paper is deducted to the theoretical studies and experimental determination of optimum leaching requirements for salt-affected lands of West Nubian Valley of Nile River, having different mechanical and chemical properties. Based on reviewing various references, summarizing the date obtained from the detailed field as well as from productive area experiments when reclaiming the first stage virgin land site West Nubian Experimental station to the objective, was to find the answer to the following important problems: - What proper parameters of leaching checks, leaching borders and specific water discharge amount should be from the view point of a rational usage of a single cubic of water, labor power economy, expenditures, machinery and time? - When leaching should be started and completed in order to perform all pre-sawing practices in time for succeeding in cultivating summer crops. - What kinds of well-known theoretical relationships can be used to determine leaching requirement for salt-effected lands under the observed conditions. - Find out the most appropriate equations which can be applied for predictive evaluation when designing optimum leaching requirements for the part of West Nubian Valley (North Sudan). - Upon the study a different drain spacing calculation as well as adequate leaching infractures and land preparation took place, taking the proper soil management practice to be performed in time. - For predictive estimation of leaching requirement values the use of Volobuev's equation have been recommended, with "𝛼" values: 1.27, 1.03, and 0.66 for heavy, medium and light soils respectively.

Keywords

• reclamation production
• ameliorative crop
• initial salt leaching
• crop rotation models