Elements of agricultural chemistry, in a course of lectures for the Board of Agriculture / By Sir Humphry Davy.

  • Davy, Humphry, Sir, 1778-1829.
Date:
1813
Catalogue details

Licence: Public Domain Mark

Credit: Elements of agricultural chemistry, in a course of lectures for the Board of Agriculture / By Sir Humphry Davy. Source: Wellcome Collection.

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    } 6 7 63808 9 = 3988 0 9 285862 0* =51046 8 =17866 - 33180 4 0 6 7 XL. Festuca eliator. Engl. Bot. 1593. Host. G. A. 2, t. 79. Tall fescue grass. Nat. of Britain. At the time of flowering, the produce from a black rich loam, is oz. or lbs. per acre Grass, 75 oz. The produce per acre - 816750 0 =51046 14 0 80 dr. of grass weigh when dry 28 dr. I The produce of the space, ditto 420 dr. j ^85862 8 =17866 The weight which is lost by the produce of one acre in drying 33180 64 dr. of grass afford of nutritive matter 5 dr. The produce of the space, ditto 93.3 At the time the seed is ripe the produce is Grass, 75 oz. The produce per acre - 816750 80 dr. of grass weigh when dry 28 dr The produce of the space, ditto 420 dr The weight lost by the produce of one acre in drying 64 dr. of grass afford of nutritive matter 3 dr. The produce of the space, ditto 56.1 The weight of nutritive matter which is lost by leaving the crop till the seed be ripe, exceeding one third part of its value - 1595 The proportional value which the grass at the time the seed is ripe, bears to that at the time of flowering, is as 12 to 20. The produce of latter-math is Grass, '23 oz. The produce per acre - 250470 0 =15654 6 0 64 dr. of grass afford of nutritive matter 4 dr. 15654 6 = 978 6 6 The proportional value which the grass of the lattermath bears to that of the crop, is as 16 to 2O; and to that at the time the seed is ripe, as 12 to 16, inverse. This species of fescue is closely allied to the Festuca pratensis, from which it differs in little, except that it is larger in every respect. The produce is nearly three times that of the F. pratensis, and the nutritive powers of the grass are superior in direct proportion, as 6 to 8. ) 38285 2 = 2392 13 2 3 7 t