. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom . zers is therefore twofold: thedirect addition of plant-food for the immediate use ofplants, and the action of the fertilizing componentsupon the solubility of the otherwise difficultly solublecompounds in the soil. There are other offices whichare very strikingly shown in the case
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches, and a synopsis of the vegetable kingdom . zers is therefore twofold: thedirect addition of plant-food for the immediate use ofplants, and the action of the fertilizing componentsupon the solubility of the otherwise difficultly solublecompounds in the soil. There are other offices whichare very strikingly shown in the case of lime. Thissubstance when in the form of either caustic or slakedlime corrects the acidity which is very often present insoils. It changes the structure of soils. It renderssome of the soil components much more soluble, espe-cially when the lime is in the form of the sulfate orgypsum, and it has undoubtedly a physiological rolewhich enables the plant to assimilate larger quantitiesof other nutrient matters even in amounts which wouldbe detrimental if the lime salt were not present in ex-cess. The principal objects of the cultivation of the soil areto secvire proper aeration, to conserve the moisture sup-ply, and to improve the drainatre. The irrigation andartificial drainage of soils are treated •-■-4;^ 2333. How the gardener makes his soil, by letting it decay in piles. The larger pile is composed of sods. The physical properties of texture and structure, thatis, the size and arrangement of the soil grains, have agreater practical importance with field crops and therelation of crops to soil under extensive cultivation thanupon horticultural crops either in the field or green-house, where intensive methods are used. Particularlyin the eastern states, where the natural rainfall is re-lied upon for the water supply, these physical proper-ties have great influence in determining the relation ofcrops to soils. This is due in large part to the influence 1676 SOIL S
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
