25 



Quackgrass was not so well controlled with other herbicides and represented 

 a larger proportion of harvested forage. Sod seeding with paraquat treat- 

 ment resulted in forage the seeding year containing only 5% alfalfa, yet 

 alfalfa represented 44% of harvested, forage the following year. As with 

 the earlier seeding, herbicide treatment was relatively more important for 

 sod seeding than for conventional seeding. 



June 4 seeding . Yield data are shown in Table 10. The average reduction 

 in seeding year yield, compared with the May 2 seeding, was 37%. As with the 

 May seeding, there was a lower yield with sod seeding than with conventional 



seeding in the seeding year. 



2 

 Although only 13 alfalfa seedlings/ft were established with sod 



2 

 seeding following glyphosate application (compared with 29 seedlings/ft with 



the same treatment and conventional seeding) , alfalfa dominated the stand 



and produced yields similar to those of the conventional seedings in the 



year following seeding. The conditions that apparently contributed to the 



successful establishment by sod seeding with glyphosate were excellent control 



of quackgrass, good moisture conservation by retaining surface mulch, and 



few annual weeds. There were fewer annual weeds invading sod-seeded than 



conventional seedings. 



