APPENDIX. 



VIII. Poa pratensis. Curt LoncL Engl. Bot. 1073. 

 Smooth stalked meadow grass. Nat. of Britain. 

 At the time of flowering, the produce from a mix- 

 ture of bog-earth and clay, is oz. or ibs. per acre 



Grass, 15 oz. : lie pmduce per acre 153350 10209 6 



83 dr. of grass weigh when dry 22-2 dr. -> 



The produce of the space, ditto 67.2 dr. 5 



The weight lost by the produce of one acre in drying 7337 15 13 



64 dr. of grass afford of nutritive matter 1.3 dr." 



The produce of the space, ditto 6.2 1-16 > 4 ' 



At the time the seed is ripe, the produce is 



Grass, 12. 8 oz. The produce per acre 136125 85C7 13 



80 dr. of grass weigh when dry 32 dr. 7 



The produce of the space, do 80 dr. J 



The weightiest by the produce of one acre in drying 5104 11 



64 dr. of grass afford of nutritive matter 1.2 dr. 7 



The produce of the space, ditto 4.2 3-165 319 6 199 6 



The weight of nutritive matter which is lost by leaving the 

 crop till the seed be ripe, being nearly one fourth of its 

 value - ..... 79 12 9 



The produce of latter-math is 



Grasp, 6 oz. The produce per acre 65340 4083 12 



64 dr. of Grass afford of nutritive matter 1.3 dr. 1786 10 111 10 



The proportional value in which the grass of the 

 latter-math exceeds that of the flowering crop, is as 

 6 to 7. The grass of the seed crop and that of the 

 latter-math are of equal value 



This grass is therefore of least value at the time 

 the seed is ripe : a loss of more than one fourth of the 

 value of the whole crop is sustained if it is not cut till 

 that period: the straws are then dry, and the root 

 leaves in a sickly decaying state; those of the latter- 

 math, on the contrary, are luxuriant and healthy. 

 This species sends forth flower-stalks but once in a 

 season, and these being the most valuable part of the 

 plant for the purpose of hay 5 it will from this circum- 



