June. l'J4U] AGRICULTURAL RESEARCH IN N. H. U 



Agricultural Chemistry 

 The Effect of Potassium Deficiency on the Metabolism of Plants 



This project has been completed and the results have been pub- 

 lished in Technical Bulletin 73. entitled "Some Effects of Potassium 

 and Nitrogen on the Composition of the Tomato Plant." 



(AdaiJis Fund) 

 The Chemical Composition of Timothy 



A series of samples, simulating- grazing, was taken during 1939. 

 These principles have been extracted and are ready for analysis, re- 

 port T. G. Phillips and T. O. Smith. 



A modification of the Bertrand titration method for the determina- 

 tion of reducing sugars has l:)een devised for use with small amounts 

 of sugar. This method is quite promising and is being tested in sev- 

 eral laboratories besides our own. 



The possibility of determining fructose in the presence of glucose 

 is being studied. (Adams Fvnd) 



Inspection of Feeding Stuffs and Fertilizers 



In the enforcement of the law regulating the sale of concentrated 

 commercial feeding stufifs. 471 brands were analyzed for the State 

 Department of Agriculture. The analyses required about 3550 in- 

 dividual determinations. 



One hundred six brands of commercial fertilizers were also ana- 

 lyzed for the State Department of Agriculture. These analyses re- 

 quired about 790 determinations. ( Miscellaneous Income) 



Lead Residue on Export Apples 



At the request of Honorable Andrew L. Felker, commissioner of 

 agriculture, a laboratory was set up to determine the amount of lead 

 remaining as spray residue on apples destined for the export trade. 

 Seventeen samples of apples were run before the European conflict 

 stopped exportation. (Miscellaneous Income) 



Chemical Services to Residents of the State 



Soil Testing. The testing of soils for the residents of the state 

 has been continued. Seventeen hundred fifty-three sam]:)les of soil 

 have been received and tested. 



Feeding stuffs, fertilizers and other miscellaneous materials to the 

 number of 94 have been analyzed for residents of the state. About 

 210 individual determinations have been made on these samples. 

 There has been, also, a considerable volume of correspondence relat- 

 ing to inquiries not involving analyses. 



Pond and Lake Bottom Samples. In conjunction with Herbert 

 Warfel of the State Fish and Game Department at Concord, work 

 was started on 19 samples of soil taken from the bottom of ponds 

 and lakes. The material was air-dried and the available nutrients 

 vrere determined. Further work is to be done with these samples, 

 such as determining the organic matter content. 



(Miscellaneous Income) 



