369 
XLI. Nardus stricta . Engl. Bot. 290. Host. G. A. 2, 
t. 4<. 
Upright mat-grass. Nat. of Britain. 
At the time the seed is ripe, the produce is 
Grass, 9 oz. The produce per acre 
80 dr. of grass weigh when dry - 32 dr. 1 
The produce of the space, ditto - 57. 2§ j 
The weight lost by the produce of one acre in drying 
64 dr. of grass afford of nutritive matter2. 1 dr. ) 
The produce of the space, ditto - 5.0j £ 
oz. or lbs. per acre. 
98010 0 = 6125 10 0 
39204 0 = 2450 4 0 
3675 6 O 
3445 10 = 215 5 10 
XLII. Triticum , Sp. 
Wheat-grass. 
At the time of flowering, the produce from a rich sandy 
loam is 
Grass, 1 8 oz. The produce per acre 
80 dr. of grass weigh when dry - 32 dr. 7 
The produce of the space, ditto - 115£ } 
The weight lost by the produce of one acre in drying 
64 dr. of grass afford of nutritive matter 2. 2 dr. ) 
The produce of the space, ditto - 11.1 f 
196020 0 = 12251 4 
78408 0 = 4900 8 
7350 12 
7657 0 = 478 9 
0 
0 
0 
0 
XLIII. Festucajluitans. Curt. Lond. Engl. Bot. 1520. 
Poa fluitans. 
Floating fescue-grass. Nat. of Britain. 
At the time of flowering, the produce from a strong 
tenacious clay is 
Grass, 20 oz. The produce per acre 
80 dr. of grass weigh when dry - 24 dr. 7 
The produce of the space, ditto 96 > 
The weight lost by the produce of one acre in drying 
64 dr. of grass afford of nutritive matter 1.3 dr. 1 „ 0>70 0 . „ 
The produce of the space, ditto - 8.3 / 5955 0 = 8,2 3 ’ 
217800 0 = 13612 8 0 
65340 0= 4083 12 0 
9528 12 0 
The above produce was taken from grass that had oc- 
cupied the ground for four years, during which time it had 
increased every year; it therefore appears contrary to 
what some have supposed to be capable of being cultivated 
in perennial pastures. 
B B 
