40 N. H. EXPERIMKXT STATION [Bulletin 310 



number of selections of this type have been made with the object of 

 securing the best possible quality in other respects combined with 

 the two points already mentioned. 



The F' of a cross between Pinkie, a high popping quality pop 

 corn, and White Pearl, an adapted New England white pop corn. 

 was made in 1938. The F^ was produced in 1939. A range in seed 

 color from practicall}' black through various degrees of red and |)ink 

 to white is to be noted on these ears. 



The variety test of watermelons again demonstrated that some of 

 the new varieties from Japan, particularly Sweet Japanese and Early 

 Sugar, are well adapted to Xew Hamjishire conditions. Some seed 

 \\as produced for distribution in small amounts. W'altham Beaut}' 

 was the outstanding early commercial pepper variety this year, al- 

 though Italian Sweet appeared promising for home gardens. Angu- 

 lar leaf spot practically ruined the muskmelon variety tests. It is 

 evident that new varieties are needed. 



About 120 varieties and strains of sweet corn were grown. Of 

 these Cockscrow, Conn. 6.4x13, and Spancross C4xl3 were the best 

 earlies. Burpeecross. Early Bancross. Spancross 39-4 and Conn. P39- 

 10 X C13 the best medium, and Golden Cross Bantam. Maine Tri- 

 cross, Maine To])cross and Maine 1.37 the best late varieties. 



In a cooperative experiment with the entomology department it 

 was found that corn planted May 15 and July 1 was much worse 

 infested by Mexican bean beetle than corn planted around June 1. 

 A dusting experiment on squash for the control of cucumber beetle 

 using four different materials gave inconclusive results. None were 

 entirely satisfactory. In a fertilizer trial with scpiash it was found 

 that the use of readily available nitrogen in the hill such as tankage 

 alone, and manure and commercial fertilizer together, increased tlie 

 yield considerably. 



A po])])ing test with 55 varieties of pop corn raised in 1938 showed 

 a great variation in the amount of expansion ranging from 4.7 with 

 Golden Tom Thuml) up to 22.4 for a local strain of White Pearl. The 

 yields, length of season recpiircd. and the quality were also recorded 

 for all of these varieties in order that we might better lie al>le to ad- 

 vise growers in Xew Ham])shire on these jioints. 



This work was in charge of J. R. Hejiler. (Hatch Fund) 



Ornamentals 



Two hundred seventy-two named varieties of Iris are in the trial 

 garden, reports H. S. Clapp. This is in cooperation with the .Amer- 

 ican Iris society. 



One hundred thirt\-t\vo luw shrub varieties were received from 

 the .Arnold .Arboretum to be used as a micleus for an adajitability 

 trial of such materials. (Hatch Fund) 



Poultry 



Protein Requirements of Chickens 



I'revious studies of various protein levels with milk, meat and fish 

 as the animal jirotein constituents have been carried on by R. C. 

 Durgin, T. ]">. Charles and A. E. Teppcr with birds in liatteries and 



