CONTENTS. ni 



Page. 



Experiments with lime nitrogen alone and mixed with lime niter, Soderbaum. 622 



The phosphate nutrition of plants, Baguley 622 



Fertilizing value of certain phosphates, Soderbaum 622 



SoUs on which phosphorite is effective, Gedroits 623 



Phosphate lands withdrawn from entry 623 



Potash-bearing rocks of the Leucite Hills, Wyoming, Schultz and Cross 623 



The fertilizing action of common salt, Soderbaum 623 



Bat guano in Mexico, Dye 623 



Utilization of sewage sludge for illuminating gas and sulphate of ammonia 624 



Annual report on fertilizers, Ross 624 



Fertilizers, Rose and Heimburger 624 



Commercial fertilizers and chemicals, Hudson, Stallrngs, et al 624 



Inspection of fertilizers for 1911, Curry and Smith 624 



AGRICULTURAL BOTANY. 



Absorption and excretion of salts by roots, I, True and Bartlett 624 



The role of nitrates in the nutrition of plants, Godlewski 625 



Utilization of cellobiose in nitrogen fixation through bacteria, Koch aind Seydel . 625 



Investigations on progi-ess and economy of nitrogen fixation, Koch and Seydel . . 625 



Investigations on the assimilation of car])ohydrates by Beta vulgaris, Ruhland . . 626 



BehaAaor of enzyms and carlwhydrates in afterripening, Appleman 626 



Fermentation, phosphates and respiration, Kostytschew and Scheloumow 627 



Relation of transpiration and stomatal movements to water content, Lloyd 627 



The degree of stomatal movement in certain plants, Livingston and Estabrook . . 627 



The respiration of fungi, Maige 628 



Influence of some organic substances on respiration, Maige and Nicolas 628 



The variation in the respiration of plants in proportion to age, Nicolas 628 



The wilting coefficient and its indirect determination, Briggs and Shantz 628 



A study of summer evaporation and plant distribution, Livingston 628 



Biological researches on protective contents of plants, Peyer 629 



Literature of tropical economic botany and agriculture, 1899-1910, Willis 629 



Seeds and plants imported from January 1 to March 31, 1911 629 



FIELD CROPS. 



Guide to experiments for 1911, Gilchrist 629 



Report on the Cawnpore Agricultural Station, 1910 and 1911, Burt 630 



Report on operations of department of agriculture, Pimjab, 1911, Hamilton et al . 631 



Report on the agricultural station, Oral, Jalaun, for 1910 and 1911, Burt 631 



Feeding crops and live stock experiments in South Africa, Sawer 631 



[Field crops experiments in South Australia], Richardson 631 



Forage experiments in SoutheiTi District, Ross 632 



North Coast experiments, Marks 632 



(Variety tests], Baylis 632 



Field manuring experiments 632 



Alfalfa, Waldron : 632 



Report of alfalfa specialist, Blinn 633 



Notes regarding the yield of alfalfa, Jenkins 633 



irials of imported lucern seed. Baring et al 634 



Crossbreeding com. Hartley et al 634 



Maize at Grafton Experiment Farm, Haywood 634 



Studies of Egyptian cotton. Balls 635 



Report on the manurial trials on cotton carried out during 1908, Hughes 635 



Agricultural varieties of the cowpea and related species. Piper 635 



Report of experiment (1909) on the best seed of Potato oats, M'Alpine 636 



Potato experimental fields, 1910-11, Seymour 636 



Potato experiments in Southern District, Ross 636 



Potato experiments on the South Coast, Makin 636 



Suggestions to potato growers on irrigated lands. Corbett 636 



Report on sugar beet experiments, 1911 , Turner 636 



Sugar-cane experiments in Antigua, Tempany 637 



Sugar-cane experiments in St. Kitts, Tempany 637 



Sweet potato rots, Ban-e 637 



Report for the year 1910 638 



Tobacco crop, 1911, by types and districts, Killebrew 639 



Wheat- breeding experiments at botanical experiment station, Pretoria, Walters. 639 



Wheat manuring experiments, 1911 639 



