270 HORTUS GKAMINEUS WOBURNENS1S. 



Produce per Acre. 

 At the time the seed is ripe, the produce is 



dr. qr. Ibs. 



Grass, 14 oz. The produce per acre 9528 12 



80 dr. of grass weigh, when dry - 40 y 



The produce of the space, ditto - 112 $ 



The weight lost by the produce of one acre in drying 4764 6 



64 dr. of grass weigh, when dry - 1 2^ ? 951 315 



The produce of the space, ditto - 5 If 3 



The produce of latter-math i-s 



Grass, 4 oz. The produce per acre 2722 8 



64 dr. of grass afford of nutritive matter 1 2 631215 



A given space of the above sandy soil, and another of a clayey 

 loam, were sown with the seeds of this grass on the 20th of May, 

 1813. The seeds vegetated, and the produce was cut in the month 

 of August following. The seeds of the creeping-rooted bent 

 (Agrostis alba), and of the larger creeping-bent or florin (Agrostis 

 stolonifera, var. latifolia), were likewise sown at the same time, 

 and treated under the same circumstances. The results were as 

 follow : 



oz. dr. qr. 



The Agrostis vulgaris, on the siliceous sandy soil, from 

 the time of sowing till the produce was cut, being 

 eleven weeks and five days, afforded of grass 1120 



From the clayey loam it afforded of grass, in the same 



time 1 8 



The Agrostis alba, on the siliceous sandy soil, from the 

 time of sowing till the produce was cut, being eleven 

 weeks arid five days, afforded of grass - 500 



From a clayey loam, it afforded of grass in the same 



time - -- . -580 



The Agrostis stolouifera, var. latifolia, on the siliceous 

 sandy soil, from the time of sowing till the produce 

 was taken, being eleven weeks and five days, afforded 

 of grass - -540 



From a clayey loam it afforded, in the same time, of 



grass 1 12 



. The fiorin, in this experiment, is less productive on a clayey soil 

 than the creeping-rooted bent, and even much less on the clayey 

 than on the sandy soil ; however, though its progress be at 



