 Q. Whence is the organic part of the soil derived? A. It is derived from the roots and stems of decayed plants, and from the dung and remains of animals and insects of various kinds. Q. Does this organic part form a large proportion of the soil ? A. Of...  Catechism of Agricultural Chemistry and Geology - Página 17por James Finlay Weir Johnston - 1844 - 48 páginasVisualização integral - Acerca deste livro
 | James Finlay Weir Johnston - 1845 - 90 páginas
...The teacher will show this experiment, and will explain the meaning of the new word car bonaceous. Q. Whence is the organic part of the soil derived?...weight; but of rich and fertile soils it does not usually form more than from a twentieth to a tenth of the whole weight. Q. Can a soil bear good crops... | |
 | James Finlay Weir Johnston - 1845 - 100 páginas
...explain (he meaning of the new word cor bonaqfous. Q Whence is t\» organic part of the soil derived I A. It is derived from the roots and stems of decayed...weight; but of rich and fertile soils it does not usually form more than from a twentieth to a tenth of the whole weight. Q. Can a soil bear good crops... | |
 | James Finlay Weir Johnston - 1856 - 98 páginas
...an organic and an inorganic or mineral part ? 111. Whence is the organic part of the soil derived ? It is derived from the roots and stems of decayed...and remains of animals and insects of various kinds. 112. Does this organic part form a large proportion of the soil ? Of peaty soils it forms sometimes... | |
 | Massachusetts - 1861 - 970 páginas
...grow consists also of an organic or combustible and of an inorganic or incombustible part. The organic is derived from the roots and stems of decayed plants...and remains of animals and insects of various kinds. A rich soil contains about one-twentieth of its weight in organic matter. This organic matter supplies... | |
 | Massachusetts Agricultural College - 1861 - 608 páginas
...grow consists also of an organic or combustible and of an inorganic or incombustible part. The organic is derived from the roots and stems of decayed plants...and remains of animals and insects of various kinds. A rich soil contains about one-twentieth of its weight in organic matter. This organic matter supplies... | |
 | Robert Warington - 1882 - 156 páginas
...maintained. Soil consists of an organic and an inorganic or mineral part; and we have seen that the former is derived from the roots and stems of decayed plants and from the dung and remains of animals, and the latter from the waste of the rocks forming the earth's crust. Organic matter is most deficient... | |
 | 1883 - 122 páginas
...Fertility. Soil consists of an organic and an inorganic or mineral part ; and we have seen that the former is derived from the roots and stems of decayed plants and from the manure and remains of animals, and the latter from the waste of the rocks forming the earth's crust.... | |
| |
