359 
over the seed crop, and points out the propriety of taking 
the crop when the grass is in flower. 
XXIII. Poa eliator, Curtis, 50. 
Tall meadow-grass. Nat. of Scotland. 
At the time of flowering, the produce from a rich clayey 
loam is 
oz. 
Grass, 1 8 oz. The produce per acre - - 1 96020 
80 dr. of grass weigh when dry - 28 dr. 7 
The produce of the space, ditto - 100. 3^ £ 
64 dr. of grass afford of nutritive matter 3.2 5 
The produce of the space, ditto - 15.3 J 
The weight lost by the produce of one acre in drying 
or lbs. per acre. 
0 = 12251 4 O 
60607 0 = 4287 15 O 
10719 13 = 669 15 13 
- 3617 15 3 
The botanical characters of this grass are almost the 
same as those of the Avena eliator , differing in the want of 
the awns only. It has the essential character of the Hold 
(Florets male, and hermaphrodite : Calyx husks two- 
valved, with two florets), and since the Avena eliator is now 
referred to that genus, this may with certainty be considered 
a variety of it. 
XXIV. Festuca duriuscula, Engl. Bot. 470. W. B. 2. P. 153. 
Hard fescue-grass. Nat. of Britain. 
At the time of flowering, the produce from a light sandy 
loam is 
Grass, 27 oz. The produce per acre - 294030 0 = 
80 dr. of grass weigh when dry - 36 dr. 7 1 g „ _ 
The produce of the space, ditto - 194. 1|J 
The weight lost by the produce of one acre in drying 
64 dr. of grass afford of nutritive matter 3. 2 dr. 1 . ~ 0 _ Q i 2 _ 
The produce of the space, ditto - 23. 2§ J “ 
At the time the seed is ripe, the produce is 
Grass, 28 oz. The produce per acre - 304920 0 = 
80 dr. of grass weigh when dry - 36 dr. 1 .. _ 
The produce of the space, ditto - 201.2| j 
The weight lost by the produce of one acre in drying 
64 dr. of grass afford of nutritive matter 1 . 2 dr. > „ _ 
The produce of the space, ditto 10. 2 dr. £ ~ 
The weight of nutritive matter which is lost by leaving 
the crop till the seed be ripe, exceeding one half of its 
value - -------- 
18376 14 0 
8269 9 O 
10106 4 8 
1004 15 12 
19075 8 O 
8575 14 O 
10481 10 O 
446 10 9 
. 558 5 3 
The proportional value which the grass, at the time the 
seed is ripe, bears to that at the time of flowering, is as 6 
to 14, nearly. 
a a 4 
