1921.] 



Improvement of Grazed Pastures. 



241 



Centre A : Penlan, Llangollen, Denbighshire :— 



Field : Old pasture in poor condition, continuously ;;razed. naturally 



well-drained. 

 Soil: Shallow, medium loam on slialy l)rash. 

 Altitude: 1,250 feet. 

 Rainfidl : Probably about 50 inches. 



Table II. - Aggregate Results for Centre A. Fourth Summer. 





Manure usetl : — 



Basic Slag. 



Cafsa 



Phosphate. ^Superphosphate. 



None. 



Plant units 

 per unit 

 area 



Gramineae 

 Leguminosae - 

 ]\Iiscellaneous 



258 

 66 



28 



258 290 

 107 • 40 



27 1 27 



200 

 8 

 26 



Total - - 



352 



392 357 



231 



Percentage 

 Frequency 



Gramineie 

 Leguminosje - 

 Miscellaneous 



78-3 

 18-7 



8-0 



65 -8 ! .sr2 

 27-3 1 11-2 

 6-9 ■ 7-G 



.S5-r) 



3-4 

 111 





100-0 



10 >-o 1 10()-0 



l(»0-(> 



increase of leguminous plants was least on this plot. There 

 was actually very little change in the miscellaneous plants, but 

 owing to the other changes involved they would appear from 

 the percentage results to have decreased. 



At this centre, Gafsa phosphate clearly had the greatest effect 

 on the aggregate botanical composition of the herbage, while its 

 effect upon the leguminous plants was considerably more marked 

 than that of basic slag. 



Table III. — Some Detailed Percentage Results for Centre A. 

 Fourth Summer. 





Basic Slag. 



Gafsa, 



Super- 

 phosphate. 



None. 





I'er cent. 



per cent. 



Per cent. 



Per cent. 



A (J rant Is tennis 



45-7 



4o-(; 



69-0 



73-1 



IIolcus lanatas 



6-8 



4-0 



5-8 



21 



Ffstuca, rubra 



6-5 



8-3 



()-l 



3-0 



Chjuosiirus crisfatits 



9-6 



6-8 



3-U 



2-6 



A iitho.raidhuvi odordt ii iii 



4-5 



6-1 



6-6 



4 -3 



Tri/aliuiii repens - 



14-2 



25-0 



10-2 



1-7 



Lotus coriiicuUitHs 



4-5 



2-3 



10 



1-7 



One of the chief features shown by Table III is that the 

 proportion of Bent grass was decreased by all three manures, 

 while that of the other grasses was increased. The extent of 

 the change varied considerably in some cases. Gafsa phos- 

 ])hate gave a remarkable increase of white clover. 



Centre B : Ffridd, Rhyd-ddu, Carnarvonshire :— 



Field: Very old pasture, continuously g-razed, irood natural ilrainage. 

 .5*017; Thin acid peat on local drift. 

 Altitude: HOO feet. 



Rainfall: Very high ('|)roltal)ly about 100 inches). 



D 



