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COON EE Fe os PAGE. PAGE. Fences on the sides of roads.:. 174 Circumstances necessary to 2 attended Disadvantages of them°», Ibid, to in them A. 174 PAR Pi EsECOND. BC FF LON“Vi SOILS. PAGE. PAGE- SOILS>:=O Applications proper in this view ca oie LOS Manner in which they are fs rmed. ibid. Reasons for their being more easy of tillage. 186 Reason of their variation of quality. ibid. Nctso disposed to the production of weeds._ ibid. Cause of their different degrees of fruitfulness ibid. CHALKY SOILS- 187 They are injured by some substances. 177 Circumstances which ee diemnas° in Kinds which have this effect:* bid, them oes ate« Reasons why those which are apparently State of the calcareous matter incorporated similar, turn out different on their with them, must be attended to outbid. being broken up. ibid. The combination of other substances with Causes of the contradictory facts respecting, the calcareous, alters its effects. ibid; in agriculture é eal78 In union with magnesia, is prejudicial to Causes of soils producing one sort of crop in vegetation:- 188 preference to another:_ ibid. Causes which form distinctions in«1 ibid Depth and quality of sub-soils:. ibid, Applications suitable for improving them- 189 The cause of differencesin them.. ibid. Reasons why much strength of draught is Causes of the difficulty of ascertaining. ibid. required in‘« 190 Methods in which attempted;. 179 Great attention to the tools employed on, Chemical analysis 5;. ibid. always necessary;= bight Natural appearances. ibid. SANDY SOILS::« ibid, Nature of plants produced by.- ibid. Mode of formation of: S é quibid, Advantages of each. ibid. On what their variation depends“ wey Pic Necessary to have recourse to experience ibid. Why less benefited than others by heat and Have been described under a variety of use- moisture- 191 less local terms. 180 ne to be attended to in improv- May be distinguished under a a heads. ibid. 2 them:.. ibid. CLAYEY SOILS 3 A. exbid. Koohe itions proper in different cases 2 Abid. Causes of the differences of;<. ibid: Reason why different applications are use- Circumstances to be attended to in improv- ful in different districts:=<“aid. ing them,. 181 Means of supplying them with eral: Applications most useful for; aoe datter‘. ibid. Methods of laying them on°. ibid. Methods in which manures may be applied Advantage of proper modes of tillage in 21-83 to them: 02 Necessary to be kept as dry as possible at all Thin soils eas:ly cultivated: Zoubid. seasons-. ibid. Causes of the disadvantages of; S ADIG, Advantages of this paca in different GRAVELLY SOILS:«“aabid. cases. ibid, Materials of which composed, various Jota iC. Circumstances to be atrended to in their til- Different arrangements of:~408 lage. ibid. Why subject to burn z. ibid. Means ofa iscertaining their aie:. 184 Lefects of, bow r moved 5 ore LOAMY SOILS:= ibid: Applications proper for in eifeceat cases, ibid. &dmit of variety f said. PEATY OR MOSSY oy‘S:- 104 Substances of which composed. ibid. Met with extensively in some districts vnbid: Manner in which they recede from clays. ibid. Causes of the varieties of E> gabid. Circumstances on which their lightness and Stratified order of-:+4) Bide friability depend é;. 185 Cause of great differences in 105 On which their colours depend:;. ibid. Hiehly retentive of water.>. dbidk Admit of improvement more readi ily than clays ibid. Injured by its evaporation:> 100

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