150 INFLUENCE OF MANURES ON GRASS LAND. 

The influence on Agrostis of Nutrate of Soda when used 
alone.—On the whole this manure, when used by itself, has not 
had any very conspicuous influence on Agrostis. Table I. 
shows that Plot 2, receiving nitrate of soda, has at two places 
produced a greater, and at two places a less, percentage of 
Agrostis than Plot 1, which was wholly untreated. The 
weight of Agrostis is, however, always greater on Plot 2— 
notably so at Castle Carrock—but so also is the weight of 
general herbage, except on the peaty soil of Glasson, where 
the nitrate has had but little effect. 
The influence on Agrostis of Nitrate of Soda when added to 
Superphosphate—To ascertain this we compare Plot 3, Table 
I. (super alone), with Plot 6 (super and nitrate). Attwo of the 
stations (Blencow and Glasson) the addition of the nitrate has 
not increased the general yield, while at Castle Carrock and 
Eskdale this treatment has produced an increase, though 
only of a single cwt. at the former station. As regards 
Agrostis it will be seen that the percentage and actual vield © 
have been rather markedly reduced at all the stations except 
Eskdale. 
The influence on Agrostis of Nitrate of Soda when added to 
Katinit.—Comparison of Plots 5 and 7, Table I., will show that 
at ull the stations the nitrate, when added to kainit, has 
increased the percentage of Agrostis. 
The influence on Agrostis of Nitrate of Soda when added to 
both Super and Kainit (compare Plots 8 and og, Table I.\—With 
the single exception of Eskdale, the addition of nitrate of soda 
to these mineral manures has very markedly reduced both 
the percentage and actual weight of Agrostis. 
The influence on Agrostis of a double and triple dose of Nitrate 
of Soda.—This was tested on Plots 2, 7, and 8 at the stations 
of Set 2 (see Table II.). The plots concerned received equal 
quantities of minerals, but Plot 7 got $ cwt. of nitrate, Plot 2 
received 1 cwt., and Plot 8 1} cwt. of that manure. Gosforth 
may be left out of account, as at that station there was no 
appreciable quantity of Agrostis on any of the plots. At two 
of the other stations the largest dressing of nitrate—where 
single and triple doses are compared—produced the smallest 
