The example of the Campine district, in Belgium, is classical. It was a most unproductive territory—mere sand from the sea, blown into irregular mounds which were only kept together by the roots of the heath; the acre of it used to be sold, not rented, at from 5s. to 7s. (15 to 20 francs per hectare). But now it is capable, thanks to the work of the Flemish peasants and to irrigation, to produce the food of one milch cow per acre—the dung of the cattle being utilised for further improvements.
The irrigated meadows round Milan are another well-known example. Nearly 22,000 acres are irrigated there with water derived from the sewers of the city, and they yield crops of from eight to ten tons of hay as a rule; occasionally some separate meadows will yield the fabulous amount—fabulous to-day, but no longer fabulous to-morrow—of eighteen tons of hay per acre, that is, the food of nearly four cows to the acre, and nine times the yield of good meadows in this country.[82] However, English readers need not go so far as Milan for ascertaining the results of irrigation by sewer water. They have several such examples in this country, in the experiments of Sir John Lawes, and especially at Craigentinny, near Edinburgh, where, to use Ronna’s words, “the growth of rye grass is so activated that it attains its full development in one year instead of in three to four years. Sown in August, it gives a first crop in autumn, and then, beginning with next spring, a crop of four tons to the acre is taken every month; which represents in the fourteen months more than fifty-six tons (of green fodder) to the acre.”[83] At Lodge Farm they grow forty to fifty-two tons of green crops per acre, after the cereals, without new manuring. At Aldershot they obtain excellent potato crops; and at Romford (Breton’s Farm) Colonel Hope obtained, in 1871-1872, quite extravagant crops of various roots and potatoes.[84]
It can thus be said that while at the present time we give two and three acres for keeping one head of horned cattle, and only in a few places one head of cattle is kept on each acre given to green crops, meadows and pasture, man has already in irrigation (which very soon repays when it is properly made) the possibility of keeping twice and even thrice as many head of cattle to the acre over parts of his territory. Moreover, the very heavy crops of roots which are now obtained (seventy-five to 110 tons of beetroot to the acre are not infrequent) give another powerful means for increasing the number of cattle without taking the land from what is now given to the culture of cereals.
Another new departure in agriculture, which is full of promises and probably will upset many a current notion, must be mentioned in this place. I mean the almost horticultural treatment of our corn crops, which is widely practised in the far East, and begins to claim our attention in Western Europe as well.
At the First International Exhibition, in 1851, Major Hallett, of Manor House, Brighton, had a series of very interesting exhibits which he described as “pedigree cereals.” By picking out the best plants of his fields, and by submitting their descendants to a careful selection from year to year, he had succeeded in producing new prolific varieties of wheat and barley. Each grain of these cereals, instead of giving only two to four ears, as is the usual average in a corn-field, gave ten to twenty-five ears, and the best ears, instead of carrying from sixty to sixty-eight grains, had an average of nearly twice that number of grains.
In order to obtain such prolific varieties Major Hallett naturally could not sow his picked grains broadcast; he planted them, each separately, in rows, at distances of from ten to twelve inches from each other. In this way he found that each grain, having full room for what is called “tillering” (tallage in French[85]), would produce ten, fifteen, twenty-five, and even up to ninety and 100 ears, as the case may be; and as each ear would contain from 60 to 120 grains, crops of 500 to 2,500 grains, or more, could be obtained from each separately planted grain. He even exhibited at the Exeter meeting of the British Association three plants of wheat, barley, and oats, each from a single grain, which had the following number of stems: wheat, ninety-four stems; barley, 110 stems; oats, eighty-seven stems.[86] The barley plant which had 110 stems thus gave something like 5,000 to 6,000 grains from one single grain. A careful drawing of that wonderful stubble was made by Major Hallett’s daughter and circulated with his pamphlets.[87] Again, in 1876, a wheat plant, with “105 heads growing on one root, on which more than 8,000 grains were growing at once,” was exhibited at the Maidstone Farmers’ Club.[88]
Two different processes were thus involved in Hallett’s experiments: a process of selection, in order to create new varieties of cereals, similar to the breeding of new varieties of cattle; and a method of immensely increasing the crop from each grain and from a given area, by planting each seed separately and wide apart, so as to have room for the full development of the young plant, which is usually suffocated by its neighbours in our corn-fields.[89]
The double character of Major Hallett’s method—the breeding of new prolific varieties, and the method of culture by planting the seeds wide apart—seems, however, so far as I am entitled to judge, to have been overlooked until quite lately. The method was mostly judged upon its results; and when a farmer had experimented upon “Hallett’s Wheat,” and found out that it was late in ripening in his own locality, or gave a less perfect grain than some other variety, he usually did not care more about the method.[90] However, Major Hallett’s successes or non-successes in breeding such or such varieties are quite distinct from what is to be said about the method itself of selection, or the method of planting wheat seeds wide apart. Varieties which were bred, and which I saw grown still at Manor Farm, on the windy downs of Brighton may be, or may not be, suitable to this or that locality. Latest physiological researches give such an importance to evaporation in the bringing of cereals to maturity that where evaporation is not so rapid as it is on the Brighton Downs, other varieties must be resorted to and bred on purpose.[91] I should also suggest that quite different wheats than the English ought to be experimented upon for obtaining prolific varieties; namely, the quickly-growing Norwegian wheat, the Jersey “three months’ wheat,” or even Yakutsk barley, which matures with an astonishing rapidity. And now that horticulturists, so experienced in “breeding” and “crossing” as Vilmorin, Carter, Sherif, W. Saunders in Canada and many others are, have taken the matter in hand, we may feel sure that future progress will be made. But breeding is one thing; and the planting wide apart of seeds of an appropriate variety of wheat is quite another thing.
This last method was lately experimented upon by M. Grandeau, Director of the Station Agronomique de l’Est, and by M. Florimond Dessprèz at the experimental station of Capelle; and in both cases the results were most remarkable. At this last station a method which is in use in France for the choice of seeds was applied. Already now some French farmers go over their wheat fields before the crop begins, choose the soundest plants which bear two or three equally strong stems, adorned with long ears, well stocked with grains, and take these ears. Then they crop off with scissors the top and the bottom of each ear and keep its middle part only, which contains the biggest seeds. With a dozen quarts of such selected grains they obtain next year the required quantity of seeds of a superior quality.[92]