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Book (stand-alone)Mapping of salt-affected soils – Technical manual 2020
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Salt-affected soils such as saline or sodic soils are distributed in all continents at various levels of problem intensity. They are soils with high amounts of soluble salts and/or sodium ions. An updated information of their distribution and drivers is a first step towards their sustainable management. This book provides technical guidelines and approach for developing a harmonized multiscale soil information of salt-affected soils. The book is organized into three sections covering seven chapters. The sections are sequentially arranged but independently designed to benefit focused readership who may want to go straight to any section. Section 1 gives the background information. It has three chapters covering existing literature on the characteristics and mapping methods for salt problems in the soil. It is intended to illustrate the basic concepts, linkage of the characteristics of salt-affected soils with input data requirements for their mapping, existing classification methods, and global distribution of these soils. Section 2 covers the methodological procedures for developing multiscale spatial information of salt-affected soils. It has two chapters describing requirements, input data preparation, and the procedural steps for developing spatial information of salt-affected soils. It outlines how data from different sources and characteristics are harmonized and integrated to produce information of salt-affected soils. Section 3 covers information sharing and resources mobilization when developing information on salt-affected soils. It gives the guidelines for preparing spatial maps and steps for value-addition to benefit end-users of the information. It also contains a generic training program for building technical capacity for mapping salt-affected -
Book (series)Squid recruitment dynamics. The genus Illex as a model. The commercial Illex species. Influences on variability. 1998
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Book (series)Trial Fishing for Lantern Fishes (Myctophids) in the gulf of oman (1989-1990) 1998
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No results found.The results of commercial trial fishing for lanternfish, Benthosema pterotum, in the Gulf of Oman are described. The fishing took place during eight cruises over the period 13 September 1989 - 12 February 1990 using the R.V. Jeng Bang, a vessel from the People's Democratic Republic of Korea. Acoustic sampling and test fishing were undertaken and additional information on yield of fish meal from raw product and mesh and trawl net design were recorded. The survey recorded information on the distri bution of the lantern fish, surface temperature and length frequency of B.pterotum. During the survey 310 fishing hauls were undertaken. Estimates of biomass were calculated for survey strata. Detailed catch data and gear design are given together with an analysis of the catch relationship.
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