INDEX. 147 



Page. 



Ben Chabat, Arab, remark on distance apart in planting date palms 22 



Bent Keballa date, notes 32, 37 



Bennet date, notes 32, 128 



Biskra, Algeria, alkali conditions in relation to date culture; clay soils. . . 76, 77 



date region, temperature curves 63-64 



evaporation records ; irrigation practice 46, 47 



Black alkali. See Alkali. 



Blooming of date trees, season and manner (see also Flowering) 16, 27, 54 



Botanical relations and characters of date palm 14-16 



4 ' Boussaafa' ' or ' ' Meznoon' ' disease of date from alkali 116 



Briggs, L. J. , devising of instrument for determining soil moisture 75 



BuHafs date, note 39 



Bud of date palm, importance 14 



Burton, Pilgrimage to Mecca, remarks on dates 40 



Calcium sulphate and chlorid, relations in soil water of Sahara 74 



Calexico, outlook for date growing, notes 104, 108 



California and Arizona, rainfall and irrigation (see also Salton Basin) 49 



date culture, probable success 122-125 



fig growing, remarks 14 



Lower (Mexico) , date production 135 



peculiarity of cold-air drainage in relation to date culture 61 



Salton Basin, conditions favorable to date growing 12 



seedling dates, experiments 20 



Camels, relation to date culture in Sahara 17 



Canary Island palm, possible use in hybridizing 125 



Carbonates in Salton Basin soil, showing of analyses 112, 113 



soil in Arizona as shown in analysis 100 



resistance of date palm 119 



Chegga, Algeria, comparison of soil and water with Ourlana, Algeria 95 



Chlorids in Salton Basin soils 112, 113, 114 



soil in Arizona, as shown in analyses 100 



maximum and injury, in Sahara, note 87 



resistance of date palm 118 



Clay soil, alkali, effect on date palm 109 



soils, use for dates, notes 77, 108, 109 



Climate, California, relation to date culture 122-125 



conditions favorable for date growing, notes 11 



for date palm, humidity 52-58 



sunshine and heat 58-70 



summary 141 



for date palm, ideal 56 



hot summer, advantages for date growing 63-70 



of Salton Basin, remarks 112 



Coachilla date, seedling, description 31 



Coast region, southern California date culture, chances of success 125 



Cold, effect on date (see also Climate, Temperature) 21, 49, 59, 60, 61, 133 



Colorado Desert. See Salton Basin. 



River flood, effects 50,103,105,129 



peculiar climatic conditions, relations to date growing 50 



quality of water, remarks 105, 106 



Valley, date culture, probable success 123, 129-133 



Yuma, similarity in alkali to Sahara 87 



Cook, O. F., report of dates in Morocco and Liberia 39, 97 



suggestion as to use of dry dates 31 



Crop plants, resistance to alkali, limit, note 121 



Crops, garden and field, in vacant space in date orchard 22 



with dates on alkali soils, remarks 115 



Cuinet, note on Khalas date 36 



Cultivation of date, suitable climate and soil; work required 11, 25 



Curing, gathering, and packing dates 29-30 



Dakar majahel, male date palm, introduction and value for pollination 24 



Date, Bearing, age 25, 136 



culture, importance of life history study (see alxo Date growing) 139-141 



in western Zab, peculiar system 78 



Mexican competition, freedom from danger 134-136 



