264 MASS. EXPERIMENT STATION BULLETIN 271 



personal contact with the individual, in the analysis of a variety of materi- 

 als of interest to agriculture. Where the results of the work are of prin- 

 cipal interest to the individual a nominal charge has been made as in the 

 past. Interpretations and advice accompany the report of analysis in all 

 cases. The following materials have Jbeen analyzed under this heading: 



Complete fertilizers 11 



Fertilizer chemicals and unmixed materials 73 



Fish, tankage and bone 5 



Lime products 1 



Insecticides 1 



Manures 3 



Manufacturers' by-products, for fertilizer value - 3 



Miscellaneous 2 



Peat products 15 



Soils, complete chemical analysis 7 



Soils, partial chemical analysis 12 



Soils, mechanical analysis 10 



Wood and cotton hull ashes 14 



In addition, the usual amount of cooperative work has been done for 

 the Association of Official Agricultural Chemists, consisting of analytical 

 work for the Referee on Nitrogen, and service on the Committee on Defi- 

 nition of Terms and Interpretation of Results on Fertilizers and Lime 

 Products. 



Vegetation Pot Experiments. (H. D. Haskins, G. J. Larsinos and 

 H. R DeKose). An experiment comprising 79 pots in a study of phos- 

 phoric acid availability of 18 phosphates was begun. It is hoped that the 

 experiment may be continued for two years more before final conclusions 

 are drawn. A vegetation experiment was also conducted in further study 

 01 the nitrogen availability of processed low-grade organic substances, oil- 

 extracted seed residues and other organic nitrogenous materials which are 

 largely used in mixed commercial fertilizers. Pots were also included to 

 note the effect of manganese sulfate. Detailed results of these experiments 

 are reported in Control Bulletin 54. 



DEPARTMENT OF FLORICULTURE 

 Clark L. Thayer in Charge 



Study of the Effect of Plant Nutrients on Carnations and Roses Under 

 Glass. (II. E. AVhite, Waltham). This project was started in June. 1030, 

 with the aim of studying the effect of the sources of nitrogen and phos- 

 phorus (organic and inorganic) on growtli and flower production. Fifteen 

 plots of thirty-five plants each of carnations, triplicated, and fifteen plots 

 of twenty-four plants each of roses, duplicated, were established; fifteen 

 fertilizer treatments are being used. 



Since the first heavy crop of carnations is just coming into bloom, it is 

 not possible to present data on flower production. The plots receiving the 

 following treatments have produced taller and heavier plants: — manure 

 and superphosphate, manure and peat, superphosphate and peat. Tiiere 



