 | Repertory of arts, manufactures and agriculture - 1805 - 534 oldal
...system of improvement. Thus a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water ; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. XVIII. Of the chemical Composition of fertile Corn Softs in this Climate. Those soils that are most... | |
 | 1805 - 534 oldal
...system of improvement. Thus a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water ; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. XVIII. Of the chemical Composition of fertile Corn Soils i in this Climate. Those soils that are most... | |
 | Friedrich Christian Accum - 1808 - 492 oldal
...system of improvement. Thus a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water ; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. 18. Of the Chemical Composition of fertile Corn Soils in this Climate. Those soils that are most productive... | |
 | John Murray - 1809 - 780 oldal
...which they rest. Thu?, a sandy soil may sometimes owe its fertility to the power of the sub-soil to retain water ; and an absorbent clayey soil may occasionally...be prevented from being barren, in a moist climate, fcy the influence of a substratum of sand or gravel." Besides aproper soil, the due application of... | |
 | Friedrich Christian Accum - 1814 - 484 oldal
...system of improvement. Thus a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water ; and an absorbent clayey soil may occasionally...climate, by the influence of a substratum of sand •r gravel. 18. Of the Chemical Composition of fertile Corn Soils in this Climate. *' Those soils... | |
 | Andrew Ure - 1821 - 418 oldal
...the system of improvement. Thus a sandy soil may owe its fertility to the power of the sub-soil to retain water; and an absorbent clayey soil may occasionally...state, and a certain quantity of vegetable or animal matter. The quantity of calcareous earth is however very various, and in some cases exceedingly small.... | |
 | Andrew Ure - 1821 - 512 oldal
...the system of improvement. Thus a sandy soil may owe its fertility to the power of the sub-yoil to retain water; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. TI lose soils that arc moit productive of corn, contain always certain proportions of aluminous or... | |
 | Anthony Todd Thomson - 1822 - 778 oldal
...fertility to the power of the subsoil to retain "water; and an absorbent clayey soil may oc" casionally be prevented from being barren, in a " moist climate, by the influence of a substra" tum of sand or gravel." Notwithstanding these obstacles, however, to the formation of perfectly... | |
 | F. ACCUM - 1828 - 526 oldal
...system of improvement. Thus a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water ; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. 16. — Of the chemical composition of fertile Corn soils in this climate. — Those soils that are... | |
 | 1839 - 520 oldal
...which they rest. Thus, a sandy soil may sometimes owe its fertility to the power of the subsoil to retain water; and an absorbent clayey soil may occasionally...by the influence of a substratum of sand or gravel. Every farmer knows the fact, that many plants «• ill grow only in certain soils; and his art consists... | |
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Thus a sandy soil may owe its fertility to the power of the sub-soil to retain water; and an absorbent clayey soil may occasionally be prevented from being barren, in a moist climate, by the influence of a substratum of sand or gravel. 
