The weight per acre, the saccharine contents of the juice, and the quotient of purity compared favourably with the best results obtained in Germany or France, and with those achieved by the Suffolk farmers, who between 1868 and 1872 supplied Mr Duncan's beetroot sugar factory at Lavenham; for the weight of their roots rarely reached 15 tons per acre, and the percentage of sugar in the juice appears to have varied between 10 and 12.
In 1747 he published an account of experiments undertaken with the definite view of obtaining true sugar from indigenous plants, and found that for this purpose the first place is taken by beetroot and carrot, that in those plants sugar like that of cane exists ready formed, and that it may be extracted by boiling the dried roots in alcohol, from which it is deposited on cooling.
The corresponding potash compounds are not manufactured in the United Kingdom, but exclusively in Germany (from potassium chloride and from the mother-liquor of the strontia process in the manufacture of beetroot sugar) and in France (from vinasse).
Linen is largely made at Gladbach, leather at Malmedy, glass in the Saar district and beetroot sugar near Cologne.
The principal crops are wheat, rye, oats, barley, maize, hemp, flax, potatoes, beetroot and tobacco.
Apart from cereals, the principal crops are beans, potatoes, beetroot and tobacco.
On the clay lands wheat and barley are the principal products, and in the western corner of the province beetroot is largely cultivated for the beet sugar industry, factories being found at Bergen-op-Zoom, Steenbergen and Oudenbosch.
In addition to the manufacture of woollen wares, for which it has long been known, there is now extensive production of vinegar, paraffin, potash and especially beetroot-sugar; while the surrounding district, which was formerly devoted in great part to marketgardening, is now turned almost entirely into beetroot fields.
The soil cannot, as a rule, be termed rich, although some parts are fertile and produce cereals, vegetables, beetroot and fruit.
A large yellow tulip (Homerica pallida) is one of the most abundant flowers on moist vlei lands on the high veld and is occasionally met with in the low veld; slangkop (Urginea Burkei) with red bulbs like a beetroot is a low bush plant apparently restricted to the Transvaal and adjacent Portuguese territory.