Humid climates (Cont'd) 



precipitation (atmospheric), p. 171 



root zone, p. 172 



soils, p. 172 



sprinkler irrigation, p. 172 



supplemental irrigation, p. 172 

 Hydrocarbons 



tainting substances, p. 48 

 Hydrodictyon 



chemical composition, p. 55 

 Hydrogen ion concentration 



alkalinity — acidity recommendation, p. 40 



dairy sanitation requirements, p. 124 



farmstead water supplies, p. 124 



fresh water, p. 32 



human tears, p. 15, 16 



irrigation water, p. 1 18 



level non-irritating to human eye, p. 16 



marine and estuarine organisms, p. 36, 68 



primary contact recreation waters, p. 4, 13 



public water supplies, p. 23 



waterfowl, p. 94 



wildlife, p. 38 

 Hypolimnion 



dissolved oxygen, p. 33, 44 



iron vs. sulfate or manganese oxide level, p. 34 



Industrial and other wastes 



toxicity, p. 37 

 Industrial plants 



water quality requirements, p. 207 



water supply, p. 206 



water treatment, p. 206 



see also Canneries; Carbonated beverage industry; Pulp 

 and paper industry 

 Industrial wastes 



bioassay, p. 37 



fluorides, p. 37 



marine and estuarine waters, p. 37 



safe concentration levels, p. 37 



sewage effluents prohibition, p. 37 

 Industrial water 



boiler feed water, p. 757, 188, 188, 194 



chemical industry, p. 187 



cooling water, p. 187, 188, 188, 194 



electric power industry, p. 188, 188 



food industry, p. 187 



leather industry, p. 188, 213 



lumbering, p. 187 



metals industry, p. 187 



oil industry, p. 187 



pulp and paper industry, p. 187 



textile industry, p. 187, 187 



water quality, p. 187, 759, 190, 194 



water treatment, p. 193 

 Industrial water quality 



thermal powerplants, p. 792 

 Inorganic compounds 



public water supplies, p. 20 



stock water, p. 134, 135 

 Insecticides 



fresh water recommendation, p. 62 



median tolerance limit, p. 62 



stock water, p. 138 

 Ion adsorption 



soils, p. 164 

 Iron 



coating gills of minnows, etc., p. 76 



farmstead water supplies, p. 123 



phytotoxicity, p. 154 



Iron (Cont'd) 



water purification, p. 128 

 Irrigated lands 



soil types, p. 152 



soil-water-plant relationships, p. 144, 145 

 Irrigation 



river systems, p. 168 



water quality control, p. 144 

 Irrigation effects 



crops, p. 144 



osmotic pressure, p. 147 



permeability, p. 170 



phytotoxicity, p. 151, 152 



plant growth, p. 146, 147 



plant morphology, p. 146 



plants, p. 145 



soil properties, p. 147 

 Irrigation practices, p. 112 



leaching requirement, p. 169 



subsurface waters, p. 112, 113 

 Irrigation water 



acidity, p. 155 



Acrolein, p. 158 



alkalinity, p. 155 



aluminum, p. 152 



Amitrole-T, p. 158 



application methods, p. 169, 170 



arsenic, p. 1 52 



beryllium, p. 152 



biochemical oxygen demand, p. 118 



boron, p. 152 



cadmium, p. 152 



chlorides, p. 117 



chromium, p. 152 



climate and salinity, p. 115 



conforms, p. 1 1 8 



consumptive use, p. 169, 170 



copper sulfate, p. 75S 



crop injury levels of herbicides, p. 77S 



2,4-D, p. 157,759 



Dalapon, p. 75S 



DDT, p. 156 



Dichlobenil, p. 759 



dimethylamines, p. 759 



Diquat, p. 75S 



dissolved oxygen, p. 118 



Diuron, p. 158 



Endothall Na and K salts, p. 759 



Fasciola hepatica, p. 162 



Fenoc, p. 759 



foliar absorption, p. 172 



helminth transmission, p. 162 



herbicides, p. 118, 775, 156, 755 



leaching fraction formula, p. 169 



leaching requirement, p. 169 



Monuron, p. 759 



nematodes, p. 160 



pesticides, p. 156 



pH, p. 118 



Pichloram, p. 759 



plant growth, p. 146, 147 



plant growth substances, p. 172, 173 



radioisotopes, p. 117, 163 



residual sodium carbonate, p. 170 



return flow, p. 168 



salinity, p. 113, 115, 777, 145, 147, 148, 169 



salinity for supplemental irrigation, p. 174 



SAR value and soil ESP value, p. 765 



schistosomiasis, p. 162 



sediment load, p. 171 



223 



