70 



MASS. EXPERIMENT STATION BULLETIN 347 



Plant Food Elements (Tons) 



Mixed fertilizers 48,527 



Unmixed fertilizer chemicals and materials 

 Pulverized natural manures 



Totals 74,274 



4,163 



Full details of the fertilizer and lime inspection will be found in Control Bulletins 

 90 and 91. 



Miscellaneous Analytical and Diagnostic Work. (H. D. Haskins, H. R. DeRose, 

 A. F. Spelman, J. W. Kuzmeski.) Chemical studies in cooperation with several 

 departments of the Experiment Station, Field Station, County Agents and men 

 in charge of the Soil Conservation work of the state have been carried on. The 

 character and extent of this work is shown in the following summary: 



Apple spray residue 17 



Apples for borax test 3 



Agricultural lime products 12 



(Soil Conservation work) 



Cranberry spray residue 1 



Dog rations 2 



Fertilizer mixtures and chemicals 26 



Fertilizers for research studies on magne- 

 sium and manganese 7 



Field crops 44 



Garbage incinerator ashes 1 



Nicotine solutions 1 



Salt lick 1 



Total . 



.115 



Other work of the department has included consultations on various projects 

 where chemical problems were involved. Research on problems developed by the 

 referees of the Association of Official Agricultural Chemists of North America 

 has received the usual attention and has included work on methods for the deter- 

 mination of magnesium oxide and manganese in fertilizer mixtures, the chemical 

 work involved in these studies being performed by Mr. J. W. Kuzmeski. A con- 

 siderable variety of chemical work has, as usual, been done for other State Insti- 

 tutions, community organizations, firms and individuals having problems of 

 agricultural interest. This group includes the analyses of the following materials: 



Animal tissues for mineral poison 3 



Ashes of various kinds 4 



Dried pulverized manures 5 



Food and forage products for mineral 



poisons 8 



Fertilizers and fertilizer chemicals 15 



Fire-damaged fertilizer 6 



Industrial by-products 8 



Lime products 6 



Miscellaneous 2 



Soils 11 



Total 68 



DEPARTMENT OF FLORICULTURE 

 Clark L, Thayer in Charge 



Breeding Snapdragons for Varietal Improvement and Disease Resistance. 



(Harold E. White, Waltham.) Rust resistance tests of approximately 50 species 

 and strains of snapdragons in the field indicate that there is a wide variation in 

 the degree of resistance to rust. Only six species of the total number studied 

 showed no susceptibility; in a few cases the number of plants tested was so small 

 that results are not considered conclusive. 



