360 MASS. EXPERIMENT STATION BUULETIN 260 



Approximately one acre more land has been assigned to turf culture 

 studies. This will be used for variety plots, turf nursery, and student 

 plots. 



DEPARTMENT OF PLANT AND ANIMAL CHEMISTRY 

 J. B. Lind&ey in CKarge 



The Efficiency of Copper Fungicides. (E. B. Holland and others). A 

 summary of the laboratory work relative to the preparation of low and 

 high basic copper sulfates and of the composition and physical character- 

 istics of the laboratory and manufacturers' samples has been presented' 

 in BuJletin 254 together with the results of several year's field tests of 

 their eflficiency as fungicides, both as sprays and dusts, in the control of 

 diseases on cucumbers, celery, potatoes and fruits. The project is held 

 in abeyance awaiting further developments of the subject. 



Supplements for Copper Fungicides. (E. B. Holland and others). Data 

 from many experiments made at this Station, both in the laboratory and 

 in the field, pertaining to the use of supplements for incorporation into 

 different copper fungicides intended to remedy some real or fancied de- 

 fect have been published in Bulletin 252, to which the reader is referred 

 for full information. 



The Effect of Fertiliz^er and Cultural Treatment on the Nitrogeno<us 

 Compounds of Havana Seed Leaf. (P. R. Nelson). The work on tobacco 

 originally undertaken by E. B. Holland and continued by P. R. Nelson 

 endeavored to measure the effect of varying amounts of nitrogen, high and 

 low topping, and different stages of maturity on the nitrogen compounds 

 of "seconds" grown on the experiment plots during the season of 1928. 

 This is a sub-project of the Department of Agronomy and is further 

 reported by that department. 



Oil Sprays. (E. B. Holland). A study of oil sprays ha.s been under- 

 taken with the view of determining the relative composition of the dif- 

 ferent brands of stock emulsion and miscibles that have been enrLployed 

 by the Department of Entomology. An effort is being made to produce 

 similar products of definite composition for field tests. Definite results 

 are not yet available for publication- 



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

 Legumes versus Non-Legumes Undler Certain Defined Agronpmi£ Condi- 

 tions. (F. W. Morse). The crops produced this year (1929) were red 

 clover for a legume and timothy for a non'-legume. They were the sec- 

 ond year's product from the seeding in the spring of 1926 described in 

 last year's report. Both lots wintered well. Conditions were favoraJble 

 for growth until early in June, after which there was little rainfall. The 

 crops were cut, sampled and weighed on July 1 and 2. They were a rep- 

 etition of those produced in 1924, therefore a comparison of results for 

 the two seasons is of interest. The comparison is made between the 

 products of the areas that have not received nitrogen in fertilizers since 

 1882. 



