272 Report on Uxjwrimenis co'ndiided vd 1887 ly 
ing subsequently, in two lots. The need of potash is shown by 
the low produce of plots 3 and 4. Plot 3 (nitrate of soda and 
superphosphate) was indeed the lower, but this was perhaps 
due, as Mr. Cooke says, to the situation of plots 1, 2, and 3 not 
being as good as that of the rest. The kainit also probably did 
not give thoroughly satisfactory results owing to this cause ; at 
any rate, it did not give as good results as were obtained from 
the use of 1 cwt. per acre of either sulphate of potash or muriate 
of potash, which gave about an equal return. The sulphate of 
potash produced rather more com, the muriate more straw. The 
best results, however, were obtained by using 1 cwt. nitrate of 
potash per acre, the quantity of nitrate of soda being reduced on 
this plot so as to give the same application of nitrate on this plot as 
on the others. The yield, it will be noticed, was nearly as high 
as on the plot on which double the amount of potash, as muriate, 
was used. These are interesting results, which will well bear 
repetition. 
B. JExperiments upon Barley after Barley. 
Mr. Cooke's Farm at Flitcham (Houghton Field). 
This experiment was similar in some respects to the last- 
mentioned, the relative effect of kainit and muriate of potash 
being tried where barley followed barley. Common salt was 
also used on one plot to see whether the beneficial results which 
Mr. Cooke had obtained with muriate (chloride) of potash were 
due to the potash, or possibly to the chlorine, in which latter 
case common salt (chloride of sodium) should have answered as 
well. The results were as follows : — 
Produce per acre 
Plot 
Manures.pci; acre , 
Head corn 
Straw 
bushels 
cwt. qrs. lbs. 
2 
1 
3 
27-37 
18 0 16 
2 
2 
,, kainit . . . ■. ■. . ■. . . 
2 
3 
„ superpliospliate . , •. • 
I 
27-75 
18 0 16 
2 
3 
„ common salt . . •. •. . -. . . 
3 
3 
„ superpliospliate . ■. • 
I 
23-37 
1.5 3 12 
2 
„ nitrate of soda ■. -. • 
4 
2 
16-50 
10 0 12 
Nitrate of soda alone was practically the nothing plot. Salt 
with superphosphate increased the yield by 7 bushels ; but both 
the muriate and the kainit added yet another 4 bushels, and 
•between them there was nothing to choose. 
