With the growing world population and the need for more food, irrigation has a vital role to play. In a climate where rainfall does not meet plant water requirements during all or part of the year, irrigation is a prerequisite for agriculture. Most of the countries with such a climate have different irrigation needs. The authors, both of whom have first hand knowledge and experience of field irrigation in many parts of the world (including Iraq, Nigeria and Indonesia), have prepared this book mainly for undergraduate and postgraduate irrigation and specialization courses. Additionally it should provide a useful text for practising engineers moving into irrigation or for students of agriculture, forestry and ecology. The topics covered include feasability studies, irrigation practices, the moisture in soils, crop water use, saline and alkaline soils, the design of field irrigation systems, the drainage or irrigated fields, flow measurement, the canal system, mechanization and land preparation for irrigation.
Sprache
Verlagsort
Zielgruppe
Für höhere Schule und Studium
Für Beruf und Forschung
Produkt-Hinweis
Illustrationen
20 b&w photographs, line drawing, charts, tables, glossary, index
Maße
Höhe: 220 mm
Breite: 140 mm
Gewicht
ISBN-13
978-0-7134-2817-9 (9780713428179)
Copyright in bibliographic data is held by Nielsen Book Services Limited or its licensors: all rights reserved.
Schweitzer Klassifikation
Part 1 Feasability studies: resources - land, water and climate; agriculture; organization and management; engineering; financial and economic aspects. Part 2 Irrigation practices: surface, sub-, overhead, trickle or drip. Part 3 the moisture in soils - soil moisture and irrigation practice: texture, structure and the moisture characteristics of soils; classification of soil moisture; evaluation of water available to the plant; the extraction pattern of soil-water by the plant; the calculation of irrigation cycles; the movement of water into soils - infiltration. Part 4 Crop water use: the energy environment of plants; the use of open-pans for measuring evaporation; soil and plant factors affecting evaporation; empirical methods for estimating evaporation; the experimental evaluation of crop evaporation by lysimetry; the scheduling of irrigation. Part 5 Saline and alkali soils: soil and water classification and crop tolerance; management and reclamation of saline, alkali and saline-alkali soils. Part 6 The design of field irrigation systems: selection of irrigation method; design of furrow irrigation layouts; design of border strip irrigation. Part 7 Drainage for irrigated lands: the reasons for drainage; surface and subsurface drainage. Part 8 The canal system: the canal layout; channel design; canal structure; maintenance. Part 9 Flow measurement: fundamental equations; weirs, orifices and siphons; measuring flume; current meters; other methods for discharge measurements in open channels. Part 10 Mechanization and land preparation for irrigation: principles of mechanization; mechanized practices on farms; general purpose agricultural machinery and implements; factors affecting the efficiency of mechanization; the compatibility of mechanization and irrigation; surveying and land preparation; land forming and setting out.
