INFLUENCE OF MANURES ON GRASS LAND. 151 

percentage and yield of Agrostis, and the same is true where 
a single dose of nitrate is compared with a double. 
Table [l1.—Effects of Manures on Agrostis (Set 2). 













Manures per Acre. Brampton, Kirkbampton. Wigton. 
as I ASciell sa.sa gc || Sl) Se Wield eae 
Plots.} 8,9 |Super| Slag |Kainit|| of ete of reece of Migldice 
As Hay > IBleRy | = ; Hay. ad 
Noss |} > Mex, |} bys |) Mis. Ih) centers VA Ibs. || ewt. VA Ibs. |! cwt. yA Ibs. 
I == — = — 27i | 24°2 | - 738 29 cy yal ie ope so 263 | 3°4 100 
2 112 392 — 392 25 29°1 84 29% | 27°8 926 27 6 8 205 
Sealeetz2h | 196 — | 392] art | 3r3 | 762) || 312 || 28i || 995 || 24 | 7:4 | 108 
4 It2 588 = 392 20% | 30°7 713 274) || 3010) | IgLrS 204 || 258 Ql 
5 Ii2 | 392| — 196 22% | 39°4 | 1,003 26x | 38°0 | 1,117 303 | 2°7 g2 
6 | 112} 392) — | 588 || 254 | 36°8 | z,040 || 30 | 4t 2 | 1.384 || 33% | 3°2 | 119 
7 56] 392 | — | 392 || 30x | 37°0 | 1,253 {| 30% | 39°3 |%353 || 29 | sr | 165 
8 168 392 | — 392 29% | 32°3 | 1,076 34 42°4 | 1,614 34% | 2°83 108 
9 56 | — | 320) 392 || 292 | 29°8 | 984 j} 354 | 38°5 | 1519 |] 34 | x12 45 
10 56 | — | 480 | 392 || 292 | 34°3 | 1,142 || 334 | 37°2 | 1,385 || 384 | s'x | 218 








Summary of the results on Agrostis obtained with Nitrate of 
Soda.— Where the nitrate ef soda is used in a manner that 
general experience has shown to be bad—that is, alone, or 
in conjunction with kainit only—it has, on the whole, 
markedly encouraged the growth of Agrostis; but where used 
in a more rational manner as an addition to super, or to 
super combined with kainit, it has only twice in eight times 
failed to diminish the percentage of this undesirable grass. 
The influence on Agrostis of Nitrate of Soda as compared with 
Sulphate of Ammonta.—Plots to and 12 of the stations of 
Set 1 (Table I.) have always received similar dressings of 
minerals, the only difference in the treatment consisting in 
the nitrogen of Plot 10 being derived from nitrate of soda, 
whereas on Plot 12 it was supplied by sulphate of ammonia. 
Without an exception the sulphate of ammonia has always 
produced a larger percentage of Agrostis. This result is in 
conformity with that obtained at Rothamsted, and is 
precisely what our knowledge of soil physics would have led 
us to expect. Sulphate of ammonia is retained by the surface 
layers of the soil toa much greater extent than is the case 
