HORTUS GHAMINEUS WOBURNENSIS. 313 



German, Wieseuhafer. 



Native of Britain. Root fibrous. Perennial. 



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



sandy loam is — 



Produce per Acre. 



dr. qr. lbs. 



Grass, 10 oz. The produce per acre - 6806 4 



80 dr. of grass weigh, when dry - 22 ^ 1871 11 8 



The produce of the space, ditto - 44 3 



The weight lost by the produce of one acre in drying 4934 8 8 



64 dr. of grass afibrd of nutritive matter 2 1^ qqq a ft 



The produce of the space, ditto - 5 2\S 



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



Grass, 14 oz. The produce per acre - 9528 12 



80 dr. of grass weigh, when dry - 24 > oftf^ft 10 



The produce of the space, ditto - 67 Oj^ 3 



The weight lost by the produce of one acre in drying 6670 2 



64 dr. of grass afford of nutritive matter I > 14Q 14 3 



The produce of the space, ditto - 3 2 3 



The weight of nutritive matter which is lost by 



leaving the crop till the seed be ripe, exceeds 



one-third part of its value - - - 90 6 5 



The proportional value which the crop at the time of flowering 

 bears to that at the time the seed is ripe, is as 9 to 4. 



This species of oat-grass is much less common than the Avena 

 pubescens or Avena flavescens. It is found more frequent on chalky 

 than on any other kind of soils : I have also found it in moist 

 meadows as well as on dry heaths. This property of thriving on 

 soils of such opposite natures is not common to the different 

 species of grass. When this grass was planted in an irrigated 

 meadow, the produce did not appear to exceed that which it 

 afforded on a dry elevated soil, though it appeared more healthy, 

 by the superior green colour of the foliage ; and it thus appears to 

 thrive under irrigation. The produce and nutritive powers, how- 

 ever, seem to be inferior to many other species of the secondary 

 grasses : on referring to former details, we find that — 



The yellow oat-grass {Avena Jiavescens) affords 



of nutritive matter from the crop at the time lbs. 



of flowering - - - - 478 9 7 q^q 



From the crop at the time the seed is ripe - 430 11 5 3 

 The meadow oat-grass {Avena pratensis), as above - - 388 



