Marcli, 1936] Agricultural Research in N. H. 13 



nia, nitrate of soda, cyanamid, and calcium nitrate. Complete fertilizers 

 with nitrogen equal to the various nitrogen carriers proved superior for hay 

 production. (F. S. Prince, L. J. Higgins, Paul T. Blood, T. G. Phillips and 

 G. P. Percival — Hatch Fund.) 



Lime-Sulphur Injury 



Lime-sulphur is credited with causing either scorching or yellowing of 

 foliage of the apple. Scorching has been produced experimentally, depend- 

 ing upon the temperature of the environment at the time the spray is applied. 

 Yellowing of the foliage sprayed with lime-sulphur has not been produced 

 experimentally ; it has not been found to be associated with scorching. 



Data obtained regarding lime-sulphur effect upon the bean is not suffi- 

 ciently extensive as yet to^ermit analysis. In one experiment undertaken 

 for the purpose of studying the eft'ect of successive sprayings on loss of 

 weight we obtained the following results : 



These results indicate that the injury produced by lime-sulphur is not cumu- 

 lative. 



Further work was carried out with the potato. 



The data showing reduction in yield to date are as follows : 



Per Cent 

 In 1934 loss in yield due to spraying plants grown at 20°C. 5.33 



" 1935 " " " " " " " " " 20°C 9^00 



(( a ii. a ii ii ii ii ii ti ^^ "X K^ C* 'X ^ C\ 



(0. Butler — Adams Fund.) 



Bitter-Pit in Apples 



Work begun the previous year on the value of heavy mulching for the 

 control of bitter-pit was continued. During the season, rainfall and tempera- 

 ture of the air and soil one inch below the surface were taken from April 

 15 to November 1. Soil moisture and nitrate determinations were also made 

 every six inches to a depth of 18 inches. During the spring the moisture 

 determinations were made when the trees were at definite stages of develop- 

 ment, but during the summer and autumn definite time intervals were used. 

 At the beginning and at the close of the season the amount of water in the 

 soil under the mulched and non-mulched trees was practically the same, but 

 during the summer it was higher under the mulch. 



The temperature of the soil under mulch was lower than under sod in 

 the early part of the season and higher at the close of the season. 



The effect of mulching in increasing the nitrate nitrogen in the soil was 

 brought out most strikingly by 1935. The difference was carried over during 

 the winter and continued through the season. As the effect of the May 29 

 application of nitrate had about disappeared on the July 2 sampling, the 



