. Bulletin of the Department of Agriculture. Agriculture; Agriculture. SisS'1$-ru Washington, D. C. February 14, 1917 SPRAY IRRIGATION. By Milo B. Williams, Irrigation Engineer. CONTENTS. Page. Introduction 1 Economic conditions justifying spray irriga- tion .' 2 Farm conditions adapted to spray 5 Amount of water required for spray irriga- tion 5 Development of water supplies 6 Screening water 12 Types of spray irrigation systems 14 Stationary-nozzle spray systems Stationary overhead spray systems Types of pumps for spray irrigation The designing of spray irrigation systems T
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. SisS'1$-ru Washington, D. C. February 14, 1917 SPRAY IRRIGATION. By Milo B. Williams, Irrigation Engineer. CONTENTS. Page. Introduction 1 Economic conditions justifying spray irriga- tion .' 2 Farm conditions adapted to spray 5 Amount of water required for spray irriga- tion 5 Development of water supplies 6 Screening water 12 Types of spray irrigation systems 14 Stationary-nozzle spray systems Stationary overhead spray systems Types of pumps for spray irrigation The designing of spray irrigation systems The designing of pumping plants Outline of procedure for installing spray irri- gation : Cost data INTRODUCTION. Within the past 10 years the spray-irrigation method has been adopted over a wide area in the United States, especially in the Atlantic Coast States from Massachusetts to Florida. Many spray- irrigation plants have been installed in the North Central States, while scattered installations can be found in practically all southern and western States. In spray irrigation water is applied to the surface of soils and to crops in the form of small drops, spray, or The first systems of spray irrigation were an outgrowth of city lawn sprinkling. It was soon demonstrated that by employing such systems small amounts of water could be applied advantageously to delicate crops, especially for supplementing an uncertain rainfall. This method also was found particularly well adapted for furnishing relatively small quantities of water to truck and small fruit crops throughout the humid region. 1 Use of Water in Irrigation, by Samuel Fortier. Note.—This bulletin is of special interest to truck and small-fruit growers of the eastern part of the United States. 66687°—Bull. 495—17 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not pe
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