BIENNIAL REIOKT, 1927 AMI) l!i'28 327 



by very heavy dew, combined with a sudden fall in temperature to witliiu 

 the above limits. 



Fifty-six plots have been established in cooperation with the United 

 States Golf Association, and nine plots have been established under trees 

 to study shade-enduring grasses. Many new strains of bent have been 

 added to the turf nursery and many data have been obtained for further 

 study. 



DEPARTMENT OF PLANT AND ANIMAL CHEMISTRY 



J. B. Lindsey in Charge 



The Efficiency of Copper Fungicides. (E. B. Holland). Additional 

 work iias been carried out in tiie laboratory relative to the preparation 

 of low and high basic copper sulfates and the manufacturer advised as 

 to tiie best method of procedure. 



Field experiments were conducted with high basic sulfate in 1927, and 

 with low and high basic sulfates in 1928. The materials were used both 

 as a spray and as a dust mixed with a free flowing talc, and were com- 

 pared with various commercial products or Bordeaux on apples, grapes, 

 celery and potatoes. The results are promising as a whole, although the 

 physical properties of the factory prei)ared basic sulfates are unsatisfac- 

 tory and demand serious attention. 



A number of papers have already been published on this project (see 

 list of publications in this report) and it is hoped to publish details of the 

 field work at an early date. 



Nitrogen Intake of Havana Tobacco in Relation to Nitrogen Synthesis 

 and Quality of Leaf. (E. B. Holland). The chemical work in connection 

 witli this project has consisted thus far of a study of the different forms 

 of nitrogen in plants grown in the greenhouse in nutrient solutions, the 

 object being to discover if possible the effect on growth and quality of leaf. 



Samples from dift'erent parts of the plant grown in the field with the aid 

 of different fertilizer mixtures will also be analyzed. The analytical work 

 with the field samples will be confined largely to the nitrogenous com- 

 pounds and to the ash, although the carbohydrates will also be given some 

 attention. 



The De])artment of Agronomy reports further on this project. 



Nitrogen Fixation in the Presence of or as a Result of the Growth of 

 Legumes versus Non-Legumes under Certain Defined Agronomic Condi- 

 tions. (F. W. Morse). The crop grown on this field in 1927 was Golden 

 Bantam sweet corn. It was used to measure the residual nitrogen and 

 was planted on both legume and non-legume areas. In the spring of 1928, 

 the legume plots were seeded with red and alsike clovers while the non- 

 legume plots were seeded with timothy and red top grasses. The catch 

 was good and the growth was fair; but owing to the extreme wetness of 

 July and August, weeds, consisting of barnyard grasses and pig-weed, 

 over-topped the clover and timothy when the crop was harvested in 

 September. 



The amounts of dry material and of nitrogen removed from the legume 

 and non-legume areas since the beginning of the experiment are given in 

 the following table. Before cutting the crop this season, observation in- 

 dicated more growth on the non-legume than on the legume areas. This 

 was confirmed by the yields of dry matter. 



