284 



EFFECTS OF mRIGATION. 



enormous croj^s. Such Isuul is seldom used for pasture, as it 

 becomes too soft and is more profitable foi mowing. 



We will next read what Prof. J. Buckman says in Jour. Roy. 

 Ag. Soc, J). 4(57, 185-1. " By irrigation the list of grasses change ; 

 bad grasses will nearly all die out, or greatly improve in quality, 

 whilst many good ones, few in number before, rapidly increase. 

 Again, such weeds as P}anta()o major. Ranunculus hnlhosus, Pan- 

 Icum sanffuinah, and many others give jilace to a groAvth of 

 grasses. 



" Take the following on the observations of a meadow which 

 was irrigated in an inferior manner. It had a subsoil of oolitic 

 gravel, and its product was that of a thin upland pasture. How 

 much it has changed will be seen from the annexed table, Avhich 

 is designed to supply information on the following points : — 



1. The names of the grasses observed. 



2. The proportions of those observed in the meadow before ir- 

 rigation. 



3. The changes effected in two years. 



4. Those affected on the fourth vear. 



NAMES. 



Alopeenrus 2i>'atetisiH, Meadow foxtail 



Poa pratensin, June grass 



Pou fririalis, Roughish ivieadow grass 



Briza media. Quaking grass 



Cynosut'iiH cn'ntatus. Dog's tail grass 



Aim caiS2)itona, Hossack grass 



Agrostis stolonifera, Marsh bent. 



Dnctylis glomerata, Orchard grass, Cock's foot. 



Arena flavescens, Yellow oat grass 



Avena pubescens, soft oat grass. 



Hordeam pratense, Meatiow barley 



Lolium perenne, Rye grass 



PROPORTIONS. 



Before After two | After four 

 I years' gears' 



Irrigation. | Irrigation. Irrigallon. 



1 

 o 



1 

 2 

 o 



1 



1 



1 



2 



1 



1 

 o 



3 

 2 

 

 1 

 

 2 

 2 

 3 

 1 

 2 

 4 



4 

 4 

 1 

 

 

 

 3 

 3 

 3 

 1 

 2 

 6 



