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Aeration, imperfect, danger in date culture, note 121 



necessity to roots of date palm 50 



of soil about date palm, effect, notes 78, 80 



importance in irrigation of dates 47 



Age. See Bearing age. 



Al Shelebi, Medina date, description 40 



Alfalfa, killing by alkali near date garden at Tempe, Ariz., note 100 



Saharan, as crop in alkaline soil in date orchard 23, 87, 115 



Algeria, alkali conditions in relation to date culture 76-99 



bearing age, continuance and yield of date palms 26 



Fougala, unusual drainage conditions in date growing 51 



irrigation of date with warm water, remarks 49 



M'Zab date region, valuable dates 37 



records of atmospheric humidity and rain in date regions 55 



shipment of date offshoots to Arizona 21, 42 



sum of mean maximum temperature in date season 68 



sum of mean temperatures in date region 66 



temperature curves in date region 63-64 



Alkali at Palm Canyon, near Sal ton Basin, date region Ill 



black, effect on plant roots and on humus 1 01 



resistance of date palm 119-120 



cause of disease of dates 116, 120 



comparison in water and soil at two Algerian stations 95 



crops resistant, notes 23, 87, 115, 121 



destruction of young date plants, and remedy therefor 21 



effect in clay soil, note 109 



on seedling date palms, caution 18 



electrical determination in soil 75 



excess, effect on date palm 79, 83, 116, 120 



explanation of term in connection with date culture 72 



freedom of land near Colorado River 130 



in Colorado River water, remarks 1 05 



relation to date culture in Salt River Valley, Ariz 99-101 



soil at Fougala, Algeria, graphic representation 81 



resistance of date palm, note 11 



soils, study and analyses to determine amount 73 



surface soil, relation to date growing 117 



injury to date palms in Sahara - 83, 86, 118 



nitrates in Sahara; in Salton Basin 85, 113 



relation to date culture in Salton Basin, Cal 101-114 



removal by irrigation and drainage 78 



resistance of date palm 72-121 



importance, remarks 76 



limits -- 115-121 



summary 141 



rise, possible benefit to date palm ' 117 



Salton Basin, chemical composition 112 



treatment for modification in date culture 47 



Alkaline lands, superior value of date for cultivation 121 



soils from Sahara, analyses other than in present publication 97 



subsidiary cultures with date plantations 115 



water, use in irrigation of date palm 50 



Amaree, early date, note 31 



13529 No. 5304 10 145 



