GRAS3E3 OF IOWA. 



313 



been repeatedly shown that many of these are worthless, the 

 same experiments are repeated. Certain grasses are adapted 

 to particular soils and climates. De Laune"^ names the follow- 

 ing five coarse grasses as best suited for England: Lactylis 



:i^\ Mli 



Fig. 146. Blue grass, Poa pratensis. The best of all our pasture grasses. Two 

 types. Blue grass offers an excellent chance for improvement, as the cut shows. 



glcnnerata, Festuca pratensis^ F. elatior, Fhleum pratense,, Alope- 

 curus pratensis. The most valuable of the finer grasses are: 

 Gynosurus cristatus, Festuca duriuscula, F. ovina, Poa trivialis, 

 Agrostis stolonifei'a and Avena flavescens. Bealf gives following 



*Jour. Roy. Agrl. Soc. 1882: 229. Beal Grasses of N.Am. 1: 229. (Ed. 2 ) 

 +Grasses of N. Am. 1 : 233. (Ed. 2.) 



