The manures most advantageously applicable to the various sorts of soils, and the causes of their beneficial effect in each particular instance / By Richard Kirwan.

  • Kirwan, Richard, 1733-1812.
Date:
1796
Catalogue details

Licence: Public Domain Mark

Credit: The manures most advantageously applicable to the various sorts of soils, and the causes of their beneficial effect in each particular instance / By Richard Kirwan. Source: Wellcome Collection.

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    of the different earths with refpedi to water, being expreffed by the quantities which each can retain without fuffering any to drop, as above laid, and the quantities retained by the mixed mals of thefe earths being proportional to the refpeftive quantities of each, it Ihould feem that in fertile foils, where the fall of rain is from 20 to 30 inches, this power fhould not exceed 70, nor fallfhort of 50 percent. It were of great eonfequence to fettle this point with precifion; but to do this would require more numerous experiments. To explain my mean* ing I fhall give one example. Of the retentive Power of the Fertile Soils, mentioned by Mr, Bergman. This foil contains, as wc have already feen, Silex - 56 Argill - 14. Calx - 30 « Now the retentive power of ioo parts Silex = 25 Argill = 250 Calx = 50 K 2 Confe-