170 HOllTUS GRAMINEUS WOBURNENSIS. 



serves to form the connecting link between the avena', hold, 

 and airO: Eng. Bot. 813. Host. t. 49, Avena elatior. Curt. 

 Lond., Avena elatior. 



Native of Britain. Perennial. 



Experiments. — At the time of flowering, the produce from a 



clayey loam is — 



Produce per Acre, 

 dr. qr. lbs. 



Grass, 25 oz. The produce per acre - 17015 10 



80 dr. of grass weigh, when dry - 30 ^ 5330 jo 



The produce of the space, ditto - 150 3 



The weight lost by the produce of one acre in drying 11635 

 64 dr. of grass afford of nutritive matter 2 2 | 

 The produce of the space, ditto - 15 2^ S 



At the time the seed is ripe, the produce is — 

 Grass, 24 oz. The produce per acre - 1 6335 



80 dr. of grass weigh, when dry - 28 7 ^717 'i 

 The produce of the space, ditto - 134 If ) 



The weight lost by the produce of one acre in drying 10617 13 

 64 dr. of grass afford of nutritive matter 1 | ^ 



The produce of the space, ditto - 6 3"^' 



The produce of latter-math is — 

 Grass, 20 oz. The produce per acre - 13612 8 



64 dr. of grass afford of nutritive matter 1 1 265 13 14 



The weight of nutritive matter which is lost by leaving 

 the crop till the seed be ripe, exceeding one-half 

 of its value, is - - - - 409 6 4 



The proportional value in which the grass at the time of fiovvering 

 exceeds that at the time the seed is ripe is as 5 to 2, and is supe- 

 rior to the grass of the latter-math in the proportion of 2 to 1. 



This grass sends forth flowering culms during the whole of the 

 season, and the latter-math produce, consequently, contains nearly 

 an equal quantity of culms with the flowering crop. It is subject 

 to the disease termed rust, but it does not make its appearance 

 till after the period of flowering; it affects the whole plant, and at 

 the time the seed is ripe the culms and many of the root-leaves are 

 withered and dry from its baneful effects. This clearly explains 

 the cause of the latter-math being superior to the crop at the time 

 the seed is ripe ; and points out the propriety of taking the crop as 

 soon as the urass is in flower. 



