INFLUENCE OF MANURES ON GRASS LAND. 165 


consistently declined in quantity before increasing dress- 
ings of super. Varying quantities of kainit, have, on the 
other hand, had no special influence. 
Table X11.—Effects of Manures on Ribwort (Set 2). 



















Manures per Acre. | 3rampton. Gosforth. ~ Kirkbampton. Wigton. 
| 
8 5 ae) Gy 4 ww 
at || OG : ; S one n S 2 SS = a Ow 
A | S70 7 ol} 2 izes 26 SE 23 Sa | 28) oe 9 
Bn E || oe ~ > 5) Us | US or oS 
Bal S| | cg | Sa OA So OO ical) oes is rors 
Fs n yl] ae ais on wie Baa) | aes = ssl 
Zo 1p) M4 al fo) pales ° ead © | ay io) ees 
aad = he Bea Fev Ea oe lad i | i 2 ge 
Ibs. | Ibs | Ibs. | Ibs. |i cwt.| Z% | lbs./!cwt.| Z% | lbs. || cwt % | |bs. || cwt Vaaa\elbss 






















‘In their effects on this plant no definite distinction can be 
drawn between super. and basic slag. 
In every case lime has increased the percentage ot ribwort, 
the average for the four stations of Set 2 being: 
General manure, without lime, 11°5 per cent. Ribwort = 393 lbs. per acre. 
* aA with lime,  16°6 as Bs ite a A 
GENERAL CONCLUSIONS. 
Nitrate of soda when used with phosphate has had a 
markedly repressing influence on Agrostis. Under these 
circumstances it has increased the yield of crested 
dogstail, though when phosphate was omitted from the 
dressing it has diminished the relative yield of this plant. 
It has greatly added to the yield of Yorkshire fog, while it 
has been the means of curtailing the development of Legumi- 
nose and ribwort. Used alone, or only with kainit, it has 
tended to encourage the production of an inferior type of 
herbage. 
Sulphate of ammonia, as compared with nitrate of soda, has 
