[40]Hoeing may be divided into Deep, which is our Horse-hoeing, and Shallow, which is the English Hand-hoeing; and also the Shallow Horse-hoeing, used in some Places betwixt Rows, where the Intervals are very narrow, as sixteen or eighteen Inches; this is but an Imitation of the Hand-hoe, or a Succadaneum to it; and can neither supply the Use of Dung, nor of Fallow, and may be properly called Scratch-hoeing.
First, as they are better nourished by Hoeing, they require less Moisture, as appears by Dr. Woodward’s Experiment, that those Plants which receive the greatest Increase, having most terrestrial Nourishment, carry off the least Water in Proportion to their Augment: So Barley or Oats, being sown on a Part of a Ground very well divided by Dung and Tillage, will come up and grow vigorously without Rain, when the same Grains, sown at the same Time, on the other Part, not thus enriched, will scarce come up; or, if they do, will not thrive till Rain comes.
Secondly, The Hoe, I mean the Horse-hoe (the other goes not deep enough), procures Moisture to the Roots from the Dews, which fall most in dry Weather; and those Dews (by what Mr. Thomas Henshaw has observ’d) seem to be the richest Present the Atmosphere gives to the Earth; having, when putrefy’d in a Vessel, a black Sediment like Mud at the Bottom. This seems to cause the darkish Colour to the upper Part of the Ground. And the Sulphur, which is found in the Sediment of the Dew, may be the chief Ingredient of the Cement of the Earth; Sulphur being very glutinous, as Nitre is dissolvent. Dew has both these.
These enter in proportion to the Fineness and Freshness of the Soil, and to the Quantity that is so made fine and fresh by the Hoe. How this comes to pass, and the Reason of it, are shewn in the Chapter of [Tillage].
To demonstrate that Dews moisten the Land when fine, dig a Hole in the hard dry Ground, in the driest Weather, as deep as the Plough ought to reach: Beat the Earth very fine, and fill the Hole therewith; and, after a few Nights Dews, you’ll find this fine Earth become moist at the Bottom, and the hard Ground all round will continue dry.
Till a Field in Lands; make one Land very fine by frequent deep Plowings; and let another be rough by insufficient Tillage, alternately; then plow the whole Field cross-ways in the driest Weather, which has continued long; and you will perceive, by the Colour of the Earth, that every fine Land will be turn’d up moist; but every rough Land will be dry as Powder, from Top to Bottom.
Altho’ hard Ground, when thoroughly soak’d with Rain, will continue wet longer than fine till’d Land adjoining to it; yet this Water serves rather to chill, than nourish the Plants standing therein, and to keep out the other Benefits of the Atmosphere, leaving the Ground still harder when ’tis thence exhaled; and being at last once become dry, it can admit no more Moisture, unless from a long-continued Deluge of Rain, which seldom falls till Winter, which is not the Season for Vegetation.
As fine hoed Ground is not so long soaked by Rain, so the Dews never suffer it to become perfectly dry: This appears by the Plants, which flourish and grow fat in this, whilst those in the hard Ground are starved, except such of them, which stand near enough to the hoed[41] Earth, for the Roots to borrow Moisture and Nourishment from it.
[41]As when Wheat is drill’d late in very poor Land, so that in the Spring the young Plants look all very yellow; let your Hoe-plough, making a crooked Line, like an Indenture, on one Side of a strait Row of this poor Wheat in the Spring, turn a Furrow from it; and in a short time you will see all those yellow Plants, that are contiguous to this Furrow, change their yellow Colour to a deep Green; whilst those Plants of the same Row, which stand farthest off from this indented Furrow, change not their Colour till afterwards; and all the Plants change or retain their Colour sooner or later gradually, as they stand nearer to, or farther from it; and the other Rows, which have no Furrow near them, continue their yellow, after all this Row is become green and flourishing: But this Experiment is best to be made in poor sandy Ground, when the Mould is friable; else perhaps the different Colour may not appear until the Furrow be turn’d back to the Row, having lain some time to be somewhat pulveriz’d (or impregnated) by the Weather, &c.
This Experiment I often made on Wheat drill’d on the Level before I drill’d any on Ridges.