1919] CONTENTS. HI 



Page, 



The influence of farmyard manure on the clover crop, Russell 131 



[American peat industry in 1918] 131 



Bueher cyanid process for nitrogen fixation, Posnjak and Merwin 131 



The question of phosphatic fertilizers, Miege 131 



Phosphatic nodules of Trichinopoly and availability, Ramaswami Sivan 131 



Analyses of inspection samples of fertilizers, 1917, Willard et al 132 



AGBICULTTJEAL BOTANY. 



Repoi't of plant physiologist, Lamkey 132 



Growth in organisms, MacDougal 132 



Root growth in desert plants and the oxygen supply of the soil. Cannon 132 



Root absoi-ption from solutions at minimum concentrations, Harvey and 



True 132 



Influence of certain solids on Knop's solution, Toole and Tottingham 133 



A simple method of demonstrating the production of aldehyde, Osterhout_ 133 



Origin and physical basis of succulence in plants, MacDougal and Spoehr_ 1^3 



The index of transpiring power of plants, Shreve 134 



Modification of root habits by experimental means, Cannon 134 



Water content and abscission in Juglann californica quercina, Lloyd 134 



Calcium oxalate in the dasheen, Black 134 



Sterility and self and cross incompatibility in shepherd's purs-e, Shull 134 



Culture of a potato hybrid. Solarium fendleriXS. tuberosum, MacDougal^ 134 



Uredinales of Guatemala based on collections by Holway, II-IV, Arthur 135 



FIELD CROPS. 



Influence of crop plants on those which follow, II, Hartwell et al 135 



[Crop rotations for northeastern Ohio], Montgomery 136 



[Report of field crops work at the Delaware Station, 1918], Grantham 136 



[Report of field crops work in Hawaii, 1918], Krauss, Sahr, and Goff 137 



[Report of field crops work in New Mexico, 1917-18] 138 



[Report of field crops work in North Dakota] 139 



Fertilizing the corn crop, Thorne 140 



Cultural experiments with cotton, 1918, Ayres 140 



Varieties of cotton, 1918, Ayres 141 



The irrigation of oats, Harris and Pittman 141 



Potato studies, Woods 142 



How to control potato enemies 143 



Fertilizer experiments with tobacco. Garner and Brown 143 



HORTICXTLTURE. 



Adaptation in relation to hardiness, Dorsey 144 



The field testing of copper-spray coatings, Winston and Fulton 144 



Report of horticulturist, McCue 145 



[Report on horticultural investigations] 145 



Report of the horticultural division. Higgins 146 



[Report on horticultural investigations in IllinoLs] 146 



[Report on horticultural investigations in New Mexico] 147 



[Report on horticultural investigations in North Dakota] 147 



Deterioration of vegetables in Porto Rico, Kinman and McClelland 147 



Simple methods of celery culture. Green 147 



Muskmelon culture in Michigan. Wnid 147 



Grafting and budding fruit trees. Green 147 



The pruning of winter-injured peach trees, Gunderson 147 



Financial history of a 12-year-old peach orchard, Eustace and Barden 147 



Description of hybrid plums and other new fruits, Haralson 147 



Raspberry culture, Loree 148 



The culture of currants and gooseberries, Loree 148 



Almond pollination. Tufts 148 



Fertilizer experiments with rice, bananas, and pineapples, Johnson 148 



