208 On Permanent and Temporary Meadows and Pastures. 
acre, according to the amount of nitrogen employed, and should 
be charged to the crops of the first or two first years, according 
as the grass-ley may have been sown by itself or with a grain- 
crop. 
3rd, and lastly. Although farmyard-manure may have been 
employed, yet it will still be desirable to give a dressing of 
89 lbs. of nitrogenous salts to the acre. 
Choice of Seeds. — The chemical composition of the soil having 
been determined by analy sis, it will be easy to choose plants 
whose wants are most suitable to the nature of the soil. 
Let us suppose that the soil to be dealt with is poor in potash, 
we shall be able to select those which require the least amount 
of potash and mix them so as to form our ley. 
Here are two mixtures in which the requirements of potash 
and phosphoric acid greatly differ : 
FiBST MiSTrEE. 
In 10 Tons. 
Phosphoric Acid. 
Potash. 
Eye-grass ^Lolium perenne) 
Anthoxanthum odoratum ' . . 
Schrader's Broraegrass 
In 1000 lbs. 
151-2 lbs. 6 -750 
127-2 ,, 5-6S0 
133-9 ,, 5-980 
153-4 ,, 6-850 
123-6 ,, 5-520 
180-7 ., 8-070 
In 1000 lbs. 
813-1 lbs. 36-300 
703-3 ,, 31-400 
594-7 26-550 
579-9 ,, 25-890 
4S8-9 ,, 21-830 
482-7 ,, 21-550 
145-0 lbs. 6-375 | 610 4 lbs. 27-256 
I 
Second Mixtcbe. 
Cynosiirus cristatus 
92-2 lbs. 4-120 
81-0 ,, 3-620 
99-2 ,, 4-430 
83-3 ., 3-720 
74-8 ,, 3-340 
92-5 ,, 4-130 
243 -0 lbs. 10 -850 
304-4 ,, 13-590 
341-3 ,, 15-240 
341-3 ,, 15-240 
366-6 ,, 16-370 
372-0 ,, 16-610 
87-1 lbs. 3 -893 
328 1 lbs. 14-650 
The second mixture, which is only about half as exhaustive to 
the soil as the first, in producing the same amount of hay, 
would succeed on much poorer soils than the first. This 
idea struck M. Goetz, who, without being able to explain the 
reasons to himself, yet succeeded by a long method, and one 
difficult of application, in getting from each soil information 
