Carrots, mangold wurtzels and sugar beets : $b How to raise them, how to keep them and how to feed themGregory, James J. H. (James John Howard)
Science
Carrots, mangold wurtzels and sugar beets : $b How to raise them, how to keep them and how to feed them
Gregory, James J. H. (James John Howard)
Carrots; Mangel-wurzel; Sugar beet
words for the immature condition of the roots, and in many cases the
cause of this undesirable condition has to be sought in the excessive
amount of ammonial or nitrogenous constituents which are applied
to the Mangolds in the shape of heavy dressings of dung. The same
remarks apply with equal force to the exclusive and to abundant use
of sulphate of ammonia, nitrate of soda, and nitrogenous manures
in general. The special effect of all ammonial and nitrogenous
manures in general, as already stated, is to produce luxuriant leaf
development, to induce prolonged and vigorous growth, resulting in an
immature and watery condition of the bulbs.
“Large roots, generally speaking, are far less nutritious than
better matured roots of a moderate size. For illustration of this
fact I quote the following comparative analyses:
+-----------------------------------------------------------+
| |Water. |
| | |Nitrogenous Constituents. |
| | | |Sugar, Pectine, &c. |
| | | | |Crude Fibre. |
| | | | | | Ash. |
+----------------------+-------+------+-------+------+------+
| Mangolds 9 lbs. | 91.85 | 1.34 | 2.86 | 2.54 | 1.41 |
| “ 7½ lbs. | 89.48 | 1.24 | 3.95 | 4.51 | .82 |
| “ 4 lbs. | 89.77 | 0.73 | 7.68 | .89 | .93 |
| “ 1 to 2 lbs. | 86.90 | 0.61 | 10.51 | 1.07 | .91 |
+----------------------+-------+------+-------+------+------+
“Small Mangolds approach Sugar Beets in composition, whilst large
Sugar Beets are hardly better than common Mangolds, and monster beets
are even less nutritious than well-matured Mangolds of fair average
size. Monster roots, as is well known, are always very watery, poor
in sugar, and almost useless for feeding purposes.
“Big Berkshire beets,--one weighing 16 pounds and the other 12¼
pounds,--contained only 3.89 or 4 per cent. of sugar respectively,
and in round numbers as much as 91½ per cent. of water. This high
percentage of water is accompanied by a larger amount of albuminous
compounds and of mineral matter, than the proportions in roots,
containing very much more solid feeding matter. A large amount of
albuminous matter and of ash, indeed indicates immaturity and poverty
in sugar, a characteristic of big, excessively manured roots.
“Generally speaking, all nitrogenous manure, either should not be
used at all, or only sparingly, for roots, on stiffish land, and
all soils which contain a good deal of clay, are naturally cold and
unfavorable to a vigorous and rapid growth. Light land, like most
productive sandy soils and friable turnip loams, favors the quick
and vigorous growth of roots, and is conducive to early maturity.
Public-domain text, read in full here on John Shaqi.
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