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See also:HOP (Ger. See also:Hopfen, Fr. houblon) , Humulus Lupulus, L., an herbaceous See also:twining plant, belonging to the natural See also:order Cannabinaceae, which is by some botanists included in the larger See also:group called Urticaceae by Endlicher . It is of See also:common occurrence in hedges and thickets in the See also:southern counties of See also:England, but is believed not to be native in See also:Scotland . On the See also:European See also:continent it is distributed from See also:Greece to Scandinavia, and extends through the See also:Caucasus and Central See also:Asia to the See also:Altai Mountains . It is common, but doubtfully indigenous, in the See also:northern and western states of See also:North See also:America, and has been introduced into See also:Brazil, See also:Australia and the Himalayas . It is a perennial plant, producing annually several See also:long twining roughish striated stems, which twist from See also:left to right, are often 15 to 20 ft. long and climb freely over hedges and bushes . The roughness of See also:stem and leaves is due to lines ofstrong hooked hairs, which help the plant to cling to its support . The leaves are stalked, opposite, 3-5 lobed, and coarsely serrate, and See also:bear a See also:general resemblance to those of the See also:vine, but are, as well as the whole plant, rough to the See also:touch; the upper leaves are sometimes scarcely divided, or quite entire . The stipules are between the See also:leaf-stalks, each consisting of two lateral ones See also:united, or rarely with the tips See also:free . The male and See also:female See also:flowers are produced on distinct See also:plants . The male inflorescence (fig . 1, A) forms a panicle; the flowers consist of a small greenish five-parted perianth (a) enclosing five stamens, whose anthers (b) open by terminal slits . The female inflorescence (fig . 1, B) is less conspicuous in the See also:young See also:state . The catkin or strobile consists of a number of small acute bracts, with two sessile ovaries at their See also:base, each subtended by a rounded bractlet (c) . Both the bracts and bractlets enlarge greatly during the development of the ovary, and See also:form, when fully grown, the membranous scales of the strobile (fig . 2, a) ; they are known as " petals " by See also:hop-growers . The bracts can then only be distinguished from the bractlets by being rather more acute and more strongly veined . The perianth (fig . 1, d) is See also:short, See also:cup-shaped, undivided and closely applied to the ovary, which it ultimately encloses . In the young strobile the two See also:purple hairy styles (e) of each ovary project beyond the bracts . The ovary contains a single ovule (fig . I. f) which becomes in the See also:fruit an exalbuminous See also:seed, containing a spirally-coiled embryo (fig . 2, b) . The See also:light dusty See also:pollen is carried by the See also:wind from the male to the female flowers .
The ovary and the base of the bracts are covered with a yellowish See also:powder, consisting of See also:minute sessile grains, called lupulin or lupulinic glands
.
These glands (fig
.
2, c) are from -T lo- to 31T in. in See also:diameter, like flattened subovate little saucers-in shape, and attached to a short pedicel
.
The upper or hemispherical portion bears a delicate continuous membrane, the cuticle, which becomes raised by the secretion beneath it of the yellowish° lupulin
.
The stalk is not perceptible in the. gland as found in See also:commerce
.
When fresh the gland is seen to be filled with a yellowish or dark See also: Until the 16th See also:century, however, hops appear to have been grown in a very fitful manner, and to a limited extent, generally only for private See also:consumption; but after the beginning of the 17th century the cultivation increased rapidly . The plant was introduced into England from See also:Flanders in 1525; and in America its cultivation was encouraged by legislative enactments in 16J7 . Formerly several plants were used as well as hops to See also:season See also:ale, hence the name " alehoof for Nepeta Glechoma, and " alecost " for Balsasnita vulgaris . The sweet See also:gale, llyrica Gale, and the See also:sage, See also:Salvia officinalis, were also similarly employed . Various liop substitutes, in the form of powder, have been offered in commerce of See also:late years, most of which appear to have See also:quassia as a See also:chief ingredient . The young See also:tender tops of the hop are in See also:Belgium cut off in See also:spring and eaten like See also:asparagus, and are forced from See also:December to See also:February . Medical Use.—The See also:principal constituents of the strobiles are lupulin, one of the few liquid alkaloids; lupulinic See also:acid, a See also:bitter crystalline See also:body, soluble in See also:ether, which is without any other pharmacological See also:action than that common to bitter substances; Valero), a volatile oil which in old hops undergoes a See also:change to the malodorous body valerianic acid; See also:resin; trimethylamine; a See also:peculiar modification of See also:tannin known as humulotannic acid; and a sesqui-terpene . The See also:British See also:pharmacopoeia contains two preparations of the strobiles, —an infusion (dose, 1-2 oz.) and a See also:tincture (See also:close, )-I drachm) . The glands obtained from the strobiles are known in See also:pharmacy as lupulin, a name which tends to confusion with that of the See also:alkaloid . They occur in commerce as a See also:bright yellow-brown powder, seen See also:tinder a See also:lens to consist of minute glandular particles . The dose of this so-called lupulin is 2-5 grains. hrom it there is prepared the Tinctura Lupulinae of the United States pharmacopoeia, which is given in doses of to-6o minims . Furchermore, there are prepared hop pillows,designed to procure See also:sleep; but these See also:act, when at all, mainly by See also:suggestion . The pharmacological action of hops is determined first by the volatile oil they contain, which has the actions of its class . Similarly the lupulinic acid may act as a bitter tonic . The preparations of hops, when taken internally, are frequently hypnotic, though unfortunately different specimens vary considerably in See also:composition, none of the preparations being standardized . It is by no means certain whether the hypnotic action of hops is due to the alkaloid lupuli'h or possibly to the volatile oil which they contain . Medical practice, however, is acquainted with many more trustworthy and equally safe hypnotics . The bitter acid of hops may endow beer containing it with a certain value in cases of impaired gastric digestion, and to the hypnotic principle of hops may partly be ascribed—as well as to the See also:alcohol—the soporific action of beer in the See also:case of some individuals . Hop See also:PRODUCTION IN ENGLAND t The cultivation of hops in the British Isles is restricted to England, where it is practically confined to See also:half-a-dozen counties —four in the See also:south-eastern and two in the See also:west-midland districts . In 1901 the See also:English See also:crop was reported by the See also:Board of Agri-culture to occupy 51,127 acres . The See also:official returns as to acreage do not extend back beyond 1868, in which See also:year the See also:total See also:area was reported to be 64,488 acres . The largest area recorded since then was 71,789 acres in 1878; the smallest was 44,938 acres in 1907 . The extent to which the areas of hops in the chief hop-growing counties vary from year to year is sufficiently indicated in Table I., which shows the See also:annual acreages over a period of thirteen years, 1895 to 1907 . The proportions in which the acres of hops are distributed amongst the counties concerned vary but little year by year, and as a See also:rule over 6o% belongs to Kent . Kent . See also:Hereford . Sussex . See also:Worcester . Hants . See also:Surrey . 1895 35,018 7553 7489 4024 2875 1783 1896 33,300 6895 5908 3800 2494 1623 1897 31,661 6542 5174 3591 2306 1416 1898 30,941 6651 4829 3567 2263 1313 1899 31,988 7227 4949 3788 2319 1388 1900 31,514 7287 4823 3964 2231 1300 1901 31,242 7497 4800 4029 2133 1232 1902 29,649 6915 4541 3779 2003 969 1903 29,933 6851 4454 3697 1920 901 1904 29,841 6767 4474 3752 1900 877 1905 30,655 6851 4647 3807 1978 843 1906 29,296 6481 4379 3672 1939 777 1907 28,169 6143 4243 3622 1842 744 Less than 200 acres in all are annually grown in the other hop-growing counties of England, these being See also:Shropshire, See also:Gloucester-See also:shire and See also:Suffolk . The See also:average yield per acre in cwt. in the six counties during the See also:decade 1897 to 1906 was as follows: Kent . 9'31 Table III. shows the average acreage, yield and total See also:home produce of England during the decades 1888–1897 and 1898–1907 . teat Periods Average Annual Average Annual Average Annual . Acreage . Yield per acre Ho-me Produce., (cwt.) . (cwt,) . 1888–1897 56,370 7 76 438,215 1898–1907 48,841 8.84 434,567 The wide fluctuations in the home production of hops are worthy of See also:note, as they exercise a powerful See also:influence upon See also:market prices . The largest crop between 1885, the first year in which figures See also:relating to production were collected, and 1907 was I See See also:Report from the Select See also:Committee on the Flop See also:Industry (See also:London, 1908) . Hants . Wcrcester . Hereford . Sussex . 9.41 7'14 7.79 Surrey . 7.23 878 that of 776,144 cwt. in 1886, and the smallest that of 281,291 cwt. in 1888, the former being more than 22 times the See also:size of the latter . The crop of 1899, estimated at 661,373 cwt., was so large that prices receded to an extent such as to leave no margin of profit to the See also:great body of growers, whilst some planters were able to market the crop only at a loss . The calculated annual average yields per acre over the years 1885 to 1907 ranged between 12.76 cwt. in 1899 and 4.81 cwt. in 1888 . No other See also:staple crop of British See also:agriculture undergoes such wide fluctuations in yield as are here indicated, the size of the crop produced bearing no relation to the acreage under cultivation . For example, the 71.327 acres in 1885 produced only 509,170 cwt., whereas the 51 843 acres in 1899 produced 661,;3,73 cwt: 19,484 acres less under crop yielded 132,203 cwt. more produce . Comparing the quantities of home-grown hops with those of imported hops, of the total available for consumption about 70°0 on the average is home produce and about 3o% is imported produce . The imports, however, do not vary so much as the home .produce . Table IV. shows the average quantity of imports to and exports (home-grown) from Great See also:Britain during the decades 1877–1886, 1887–1896 and 1897–1906 . Periods . Annual Average Annual Average Imports (cwt.) . Exports (cwt.) . 1877–1886 215,219 10,805 1887–1896 194,966 9,437 1897–1906 186,362 14, 808 L The highest and lowest imports were 266,952 cwt. in 1885 and 145,122 cwt. in 1887, the latter in the year following the biggest home-grown crop on See also:record . On a See also:series of years the largest proportion of imports is from the United States . During the twenty-five years 1881–1905 the annual values of the hops imported into England fluctuated between the wide limits of 12,962,631 in 1882 and 1427,753 in 1887 . In five other years besides 1882 the value exceeded a million See also:sterling . The annual average value over the whole period was 1921,000, whilst the annual average import was 194,000 cwt., consequently the average value per cwt. was nearly 14, I5s., which is approximately the same as that of the exported product .
The quantities and values of the imported hops that are again exported are almost insignificant
.
Hon PRODUCTION IN THE UNITED STATES
The See also:distribution of the area of hop-cultivation in the United States showed great changes during the last decades of the 19th and the first decade of the loth century
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During the earlier portion of that period New See also:York was the chief hop-growing state of the See also:Union, but toward the end of it a great See also:extension of hop-growing took See also:place on the Pacific See also:coast (in the states of See also:Oregon, See also:California and See also:Washington), where the richness of the See also:soil and mildness of the See also:climate are favourable to the bines
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The average annual produce of hops in the United States from 'goo to 1906 was 423,471 cwt.; of this quantity 8o %, was raised in the three states of the Pacific coast, where the yield per acre is much larger than in New York
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In the latter state the yield does not appear to exceed 5 or 6 cwt. per acre, whereas in Oregon it is 9 or to cwt., and in Washington and California from 12 to 14 cwt
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The average annual export (chiefly to Great Britain) in the years from 1899 to 1905 was 108,400 cwt.; the average import (chiefly from Germany) is about 50,000 cwt
.
Hon CULTIVATION
As the See also:county of Kent has always taken the See also:lead in hop-growing in England, and as it includes about two-thirds of the hop acreage of the British Isles, the See also:recent developments in hop cultivation cannot he better studied than in that county
.
They were well summarized by Mr See also: 0 19 0 Dressing (or cutting) . 0 6 0 Poling, tying, earthing, See also:ladder-tying, stringing, 2 3 0 lewing . Shimming, nidgeting, digging See also:round and hoeing 3 0 0 hills . . . Stacking, stripping, making bines, &c . 0 17 0 Annual renewal of poles 2 10 0 Expense of picking, drying, packing, See also:carriage, sampling, selling, &c., on average crop of, say, Io _ 7 cwt. per acre . . 5 0 See also:Rent, rates, taxes, See also:repairs of See also:oast and tacks, See also:interest 6 o 0 on See also:capital Sulphuring . I o 0 Washing (often two, three or four times) . 2 0 0 Total 35 10 0 Seven years later the average cost per acre in Kent had risen to quite 137 . 2 J . See also:Percival, "The Tiop and its F..uglish V'arietics," Jour . Roy . -1 Uric . See also:Soc., 1901 . poor See also:character and least suitable for hop production have been gradually grubbed since 1894, on See also:account of large crops, the importation of hops and See also:low prices . At the beginning of the 19th century there were 290 parishes in Kent in which hops were cultivated . A century later, out of the 413 parishes in the county, as many as 331 included hop plantations . The hops grown in Kent are classified in the markets as " East Kents," " See also:Bastard East Kents," " See also:Mid Kents " and " Wealds," according to the See also:district of the county in which they are produced . The relative values of these four divisions follow in the same order, East Kents making the highest and Wealds the lowest rates . These divisions agree in the See also:main with those defined by See also:geological formations . Thus, " East Kents " are grown upon the See also:Chalk, and especially on the outcrop of the soils of the London See also:Tertiaries upon the Chalk . " Bastard East Kents " are produced on alluvial soil and soils formed by admixtures of See also:loam, clayloams, chalk, See also:marl and See also:clay from the See also:Gault, See also:Greensand and Chalk formations . " Mid Kents " are derived principally from the Greensand soils and outcrops of the London Tertiaries in the upper See also:part of the district . " Wealds " come from soils on the See also:Weald Clay, See also:Hastings See also:Sand and Tunbridge See also:Wells Sand .
As each " See also:pocket " of hops must be marked with the owner's name and the See also:parish in which they were grown, buyers of hops can, without much trouble, ascertain from which of the four divisions hops come, especially if they have the See also:map of the hop-growing parishes of England, which gives the name of each parish
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There has been a considerable rearrangement of the hop plantations in Kent within recent years
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Common varieties as Colegate's, See also:
Many planters See also:pole hop plants the first year with a single short pole, and stretch coco-See also:nut-fibre See also:string from pole to pole, and grow many hops in the first season
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Much of the hop land is ploughed between the rows, as labour is scarce, and the spaces between are dug afterwards
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It is far better to dig hop land if possible, the See also:tool used being the Kent spud
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The cost of digging an acre ranges from 18s. to 21s
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Hop land is ploughed or dug
between November and See also: See also:Fish guano or desiccated fish is largely used; it is very stimulating and more lasting than some of the other forcing manures . The recent investigations into the subject of hop-manuring made by Dr See also:Bernard See also:Dyer and Mr F . W . E . Shrivell, at See also:Golden See also:Green, near See also:Tonbridge, Kent, are of interest . In the 1901 report 1 it was stated that the See also:object in view was to ascertain how far nitrate of soda, in the presence of an abundant See also:supply of See also:phosphates and potash, is capable of being advantageously used as a source of nitrogenous See also:food for hops . An See also:idea long persisted among hop-growers that nitrate of soda was an unsafe manure for hops, being likely to produce See also:rank growth of bine at the expense of quality and even quantity of hops . During recent years, however, owing very largely to the results of See also:Weight of See also:Kiln-dried Fuggle's Hops per Acre . In only one year did the very large dressing of 10 cwt. of nitrate of soda per acre afford any better result than was produced by the less heavy dressing of 8 cwt. per acre, and this was in 1899, a 'season of such abundance and such low prices that it may be regarded as an abnormal season . If the effect of this one season on the average be eliminated, the best results, as regards quantity, were obtained on See also:plot E, receiving 8 cwt. of nitrate of soda per acre . But plot C, with 4 cwt. only of nitrate of soda per acre, has been on the average not more than 1 cwt. per acre behind plot E . Valuations of the hops made by merchants and factors show that, on the whole, the market quality of the produce is very little affected by manuring . Moreover, chemical investigation of the hops appears to indicate that the See also:brewing quality is not in any See also:constant or definite way influenced by the manuring, except where the quantity of nitrate of soda has amounted to the large dressing of 8 cwt. or more per acre, a quantity which in some seasons would seem to have been pre-judicial, although in one season it happened that the highest brewing value appertained to a See also:sample grown with as much as to cwt. per acre . The results of See also:modern investigation show that it is very largely to the presence and proportion of soft resin that hops owe their preservative value, although the quality of hops is by no means wholly dependent on this one feature . The resin percentages on the samples grown on the several plots in 1898, 1899 and 1900 were the following:- Plot . Annual Manuring per Acre . 1896 1897 1898 1899 1900 Avera7] of 5 Years . A Phosphates and potash . Cwt . Cwt . Cwt . Cwt . Cwt . Cwt . 131 71 84 201 8 111 B Phosphates, potash and 161 94 104 224 91 131 2 cwt. nitrate of soda . C Phosphates, potash and 161 12 121 23 11 15 4 cwt. nitrate of soda . D Phosphates, potash and 154 13 13 221 101 141 . 6 cwt. nitrate of soda . E Phosphates, potash and 15 131 151 231 11 151 8 cwt. nitrate of soda . F Phosphates, potash and 15 13 15 241 101 151 to cwt. nitrate of soda X 30 loads (about 15 tons) 13 8 91 241 101 131 London dung . . . 1898 1899 1900 1898 Plot . Annual Manuring per Acre . Total Resin . Soft Resin . Total Resin . Soft Resin . Total Resin . Soft Resin . A Phosphates and potash . Per Cent . Per Cent . Per Cent . Per Cent . Per Cent . Per Cent . 14.15 9.21 15.07 8.6o 14'53 8.90 B Phosphates, potash and 2 cwt. nitrate of soda 14.30 9.20 16.59 8.83 15.09 8.51 C Phosphates, potash and 4 cwt. nitrate of soda 14.06 9.04 15.87 9.27 14.46 8.16 D Phosphates, potash and 6 cwt. nitrate of soda 13.57 8.6o 14.90 8.7o 13.46 7.62 E Phosphates, potash and 8 cwt. nitrate of soda 14.11 8.85 14.49 8.96 13.30 7.18 F Phosphates, potash and to cwt. nitrate of soda 12.21 7.91 15.47 9'41 12.77 6.77 X 30 loads (about 15 tons) London dung . . 13'93 8.66 14'92 8.8o 14'78 9'07 these experiments, and of corresponding experiments based upon these, which have been carried out abroad, hop farmers have much more freely availed themselves of the aid of this useful manure; and there is little doubt that the distrust of nitrate of soda as a hop manure which has existed in the past has been largely due to the fact that nitrate of soda, like many other nitrogenous manures, has often been misused (1) by being applied without a sufficient quantity of phosphates and potash, or (2) by being applied too abundantly, or (3) by being applied too late in the season, with the result of unduly delaying the ripening period . On most of the experimental plots nitrate of soda (in See also:conjunction with phosphates and potash) has been used as the See also:sole source of See also:nitrogen; but it is, of course, not be to supposed that any hop-grower would use year after year, as is the case on some of the plots, nothing but phosphates, potash and nitrate of soda . See also:Miscellaneous feeding is probably See also:good for plants as well as for animals, and there is a large variety of nitrogenous manures at the disposal of the hop-See also:farmer, to say nothing of what, in its place, is one of the most valuable of all manures, namely, home-made dung . These experiments were begun in 1894 with a new See also:garden of young Fuggle's hops . A series of experimental plots was marked out, each plot being one-See also:sixth of an acre in area . The plots run parallel with one another, there being four rows of hills in each . The climate of the district is very dry . The table given above shows the annual yield of hops per acre on each plot, and also the average for each plot over the five years 1896-1900 . _gee __gee__ gee__ _gee_ _sae_ ':'ix fears' Experiments on Hop Manuring (London . 1901) . general results seem to show that the See also:purchase of See also:town dung for hops is not economical, unless under specially favourable terms as to cost of See also:conveyance, and that it should certainly not be relied upon as a sufficient manure . Home-made dung is in quite a different position, as not only is it richer, but it costs nothing for railway carriage . As a source of nitrogenous manure, See also:purchased dung is on the whole too expensive . There is a large variety of other nitrogenous manures in the market besides nitrate of soda, such, for instance as Peruvian and See also:Damaraland guano, sulphate of See also:ammonia, fish guano, dried See also:blood, rape dust, furriers' refuse, See also:horn shavings, hoof parings, wool dust, shoddy, &c . All of these may in turn be used for helping to maintain a stock of nitrogen in the soil; and the degree to which manures of this See also:kind have been recently applied in any hop garden will influence the grower in deciding as to the quantity of nitrate of soda he should use in conjunction with them, and also to some extent in fixing the date of its application . Dressings of 8 or to cwt. of nitrate of soda per acre, such as are applied annually to plots E and F, would be larger than would be put on where the land has been already dressed with dung or with other nitrogenous manures; and even, in the circumstances under See also:notice, although these plots have on the average beaten the others in weight, the hops in some seasons have been distinctly coarser than those more moderately manured-though in the dry season of 1899 the most heavily dressed plot gave actually the best quality as well as the greatest quantity of produce . With regard to the application of nitrate of soda in case the season should turn out to be wet, See also:present experience indicates that, on a ;oil otherwise liberally manured, 4 cwt. of nitrate of soda per acre applied not too late, would be a thoroughly safe dressing . In the case of neither dung nor any other nitrogenous fertilizers having been recently applied, there seems no See also:reason for supposing that, even in a wet season, 6 cwt. of nitrate of soda per acre applied early would be otherwise than a safe dressing, considering both quantity and quality of produce . In conjunction with dung, or with the early use of other nitrogenous manures, such as fish, guano, rape dust, &c. it would probably be See also:wise not to exceed 4 cwt. of nitrate of soda per acre . As to the date of application, See also:April or May is the latest See also:time at which nitrate of soda should, in most circumstances, be applied, and probably April is preferable to May . The quantity used should be applied in See also:separate dressings of not more than 2 cwt. per acre each, put on at intervals of a See also:month . Where the quantity of nitrate of soda used is large, and constitutes the whole of the nitrogenous manure employed, the first dressing may, on fairly deep and retentive soils, be given as early as See also:January; or, if the quantity used is smaller, say in February; while February will, in most cases, probably be early enough for the first dressing in the case of lighter soils . The See also:condition of the soil and the degree and distribution of rainfall during both the prenious autumn and the winter, as well as in the spring itself, produce such varying conditions that it is almost impossible to See also:frame general rules . The commonly accepted notion that nitrate of soda is a manure which should be reserved for use during the later period of the growth of the bine appears to be erroneous . The summer months, when the growth of the bine is most active, are the months in which natural nitrification is going on in the soil, converting soil nitrogen and the nitrogen of dung, guano, fish, rape dust, shoddy or other fertilizers into nitrates, and placing this nitrogen at the disposal of the plants; and it appears reasonable, therefore, to suppose that nitrate of soda will be most useful to the hops at the earlier stages of their growth, before the products of that nitrification become abundant . This would especially be so in a season immediately following a wet autumn and winter, which have the effect of washing away into the drains the residual nitrates not utilized by the previous crop . The necessity, whether dung is used or not, and whatever form of nitrogenous manure is employed, of also supplying the hops with an abundance of phosphates, cannot be too strongly urged . The use of phosphates for hops was long neglected by hop-planters, and even now there are many growers who do not realize the full importance of heavy phosphatic manuring . On soils containing an abundance of See also:lime no better or cheaper phosphatic manure can be used than See also:ordinary superphosphate, of which as much as to cwt. per acre may be applied without the slightest fear of harm . But if the soil is not decidedly calcareous—that is to say, if it does not effervesce when it is stirred up with some diluted hydrochloric (muriatic) acid—See also:bone dust, phosphatic guano or basic slag should be used as a source of phosphates, at the See also:rate of not less than to cwt. per acre . On See also:medium soils, which, without being distinctly calcareous, nevertheless contain a just appreciable quantity of carbonate of lime, it is probably a good See also: |