1921.] 



Improvement of Grazed Pastures. 



243 



Similarity between the figures for tlie ground lime and super- 

 phosphate plots is also observable. 



By the sixth summer, the basic slag, Gafsa, and super- 

 phosphate plots were in a bad state. The first two j^lots had a 

 patchy appearance, with a considerable proportion of practi- 

 cally bare soil, while the superphosphate and the unmanured 

 plots appeared to be exactly alike. The supeiphosphate with 

 lime and the ground lime plots were, on the other hand, in 

 excellent condition, while the ground limestone plot w^as much 

 improved. As will be seen from Table IV, the unmanured 

 plot had suffered relatively little change in the interval, but 

 the change in Plots I, II and III was very marked, the legu- 

 minous plants having all but disappeared. At the same time, 

 there was a decrease of these plants on the superphosphate with 

 lime plot, but the percentage composition of the herbage was 

 still good. The change on the ground lime plot was relatively 

 small, but there was a considerable increase in the gramineous 

 plant units per unit area. These aggregate figures do not show 

 any great difference between the first three plots in the sixth 

 year, but, as will be seen from Table V, the superphosphate, 

 plot was much more nearly similar to the unmanured plot than 

 either the basic slag or the Gafsa plots. 



Table V. — Some Percentage Frequency results for Ffridd 

 Obtained in the Fourth and Sixth Summers after Treatment. 



Manure used 



Agfo.it is spp 



Feducd ov'uut, ... 

 Molinia co'nilea 

 A ntho.vanth lait odorat urn 

 Tnfol 'mm repeiu 

 Potent'dla erectd 

 Sag'ina procumhens 



Basic 

 Slag. 



Gafsa 

 Phos- 

 phate. 



33-8 

 17-4 

 0-4 

 5-3 

 20-9 

 0-5 

 2-4 



Agrodls spp. ... .. 47'1 



Featuca orlna ... ... 6*1 



Molinifi iucnilca ...I 2'() 



Antlioxantlinm o<lor(itnm\^ 5'5 



Trifolium reprm ...\ 5-2 



Potent'dla erect a ... 1-2 



Saf/ifta ])rocu)iili('n.^ ... 2 ;} 



31-9 

 25-9 

 0-5 

 2-6 

 22-9 



0- 2 



1- 2 



58-4 

 5-3 



0- 6 



1- 9 

 1-9 

 0-9 

 9-r. 



Super- 

 phos- 

 phate. 



17-7 

 370 

 3-9 

 3-6 

 20-7 

 0-4 



No 

 Manure. 



21-0 

 27-9 

 4-4 



1-3 



0-2 



22-7 

 41-9 

 7-1 

 2-9 

 4-9 

 2-0 

 0-5 



18-8 

 40--) 

 4-9 



2- 3 



3- 9 

 0-6 



Ml per- 



Ground 

 Lime. 



21- 9 

 34-6 



2-7 



1- 



22- 9 

 lo 



2- 4 



28-1 

 39-3 

 3-3 



13-4 

 2-0 



Lime. 



Ground 

 T ime- 

 stone. 



16-1 

 38-9 

 3-4 

 3-2 

 19-2 

 1-0 

 1-9 



22-2 

 36-6 

 2-0 

 1 '5 

 l()-9 

 2-8 

 0-8 



48-L' 

 7*5 

 2-7 



1-6 



22-8 

 35 

 4 

 2-7 

 12-2 

 2-7 

 0-."> 



* Average for three unlreated plot$, one at each ciul of the series, the other in 

 the centre. The figures for these three plots varictl but little, e.q.. y1(/ro.^tis : — 

 23-8, 23-7, 20 5 per cent. 



D 2 



