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.

    391/428 (page 35)
    XLIV. Holcus lanatus. Curt. Lond. FI. Dan. 1181. Meadow soft grass. Yorkshire grass. Nat. of Britain. 8 0 - 12395 14 8 = 1191 1 60984 0 13102 0 : 3811 15246 8 0 8 At the time of flowering, the produce from a strong clayey loam, is oz. or lbs. per acre Grass, 28 oz. The produce per acre - 304920 80 dr. of grass weigh when dry 26 dr. 1 _ The produce of the space, ditto 157.2f J The weight lost by the produce of one acre in drying 64 dr. of grass afford of nutritive matter 4 dr. 1 The produce of the space, ditto 28 dr. 19057 At the time the seed is ripe, the produce is Grass, 28 oz. The produce per acre - 80 dr. of grass weigh when dry 16 dr. I The produce of the space, ditto 89.2f j The weight lost by the produce of one acre in drying 64 dr. of grass afford of nutritive matter 2.3 dr. \ The produce of the space, ditto 19.1 dr.) The weight of nutritive matter which is lost by leaving the crop till the seed be ripe, exceeding one third part of its value - 372 3 8 The proportional value which the grass at the time the seed is ripe, bears to that at the time of flowering, is as 11 to 12. - 304920 0 =19057 8 0 818 14 0 XLV. Festuca dumetorum. Flo. Dan. 700. Pubescent fescue grass. Nat. of Britain. At the time of flowering, the produce from a black sandy loam, is Grass, 16 oz. The produce per acre - 174240 0 =10890 0 0 80 dr. of grass weigh when dry 40 dr l The produce of the space, ditto 128 dr. J The weight lost by the produce of one acre in drying 64 dr. of grass afford of nutritive matter 1 dr.~l The produce of the space, ditto 4dr.J 87120 0 = 5445 0 - 5445 0 2722 8 = 170 2 8