lor seedlings to become established. Since the plots were cut only twice 

 per year, a large amount of seed was undoubtedly produced in 1953. It 

 did not appear that establishment of clover plants from surviving young 

 stolons of the original seeding occurred to any great extent in this test. 

 Stands of clover obtained in this manner are variable, and yields are much 

 lower than from the original seeding. 



Significantly higher yields were obtained for the mixture for all years 

 except 1954. The interaction of varieties times combinations was significant 

 onlv in 1955. 



One purpose of this experiment was to determine whether northern types 

 of bromegrass, which are somewhat less aggressive than southern types, 

 will support larger percentages of Ladino clover in a mixture. Unfortu- 

 nately, almost all of the Ladino in the original seeding was dead by the 

 spring of 1954. Apparently, most of the Ladino clover after the 1954 sea- 

 son resulted from natural reseeding. Table 6 shows the average percent 

 of Ladino clover in the mixture for the four seasons. In this test, there 

 was no evidence in any year for a larger percentage of Ladino in mix- 

 tures with northern types of bromegrass. 



Table 6. Average Percent Ladino Clover in Bromegrass Plots, 

 Colebrook, New Hampshire, 1953-1956.* 



* Based on dry weights of botanical separates made for each harvest, with 3 plots 

 per variety. 



In addition to the varieties mentioned in these tests, one other variety, 

 Manchar, has recently given excellent production in a test near Dover, New 

 Hampshire. It has produced significantly higher yields than Achenbach, 

 Lincoln, or Canadian commercial for the past two years. 



A breeding program is now underway at the New Hampshire Station 

 on the improvement of bromegrass. Figure 3 shows a breeding nursery 

 where selection is being made for: (1) resistance to brown leaf spot 

 iPyrenophora bromi) , the major leaf disease in New Hampshire, (2) 

 better recovery, (3) improved leafiness, and (4) vigor. Some progress 

 has been made in this program, and it is hoped that within a few years 

 varieties more suitable for this region will be available. 



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