92. 



c In no at countries coils vary in "'ide limits even on no small 

 n's 40 acre lot*, i-evcral kinds of soil may be on : lands. 

 -oil quality -ind kind is rcfl by th - therton, especially in 

 force' iculnrly i" r.oiuit^in country. 



3. l n i ..... ->rtions of the land surface of the northern hemi- 

 sphere "soils I oved by -lacier:-, ice, -vine <md \vr.t wr. 

 therefore large portions of land arc deficient in soils, bare rock 



ft by th ciers, or nt lei soil depths. Slit condi- 



tion may be Men near . t,her places, on the contrary, may have 

 /y deposits o: .*ier a over the re-;ul?xr soils. 



mter transport v?.j.3t quantities of soil, particularly 

 fcch cov 11 oy lands, "inds especially are important in aria 

 semi-arid inr.da and in coast regions. Wind can often cover the land 

 with t idly, ially on railroad lines in fills and cuts 



in the ec - 



.cli of follows is a part of a Review of Soil frow the 



Forester's 3 1': rid-point. 



In roost of our land the soils are still in place and are called 

 aedent-r, soils, bi ce on the underlying rock. The quality of 

 the soils depends on the kind of rock which produces tfcem. Uock, 



^ ) f 



n how to make soil maps and soil reports from the Bureau or 



.t of Agriculture. Vhcy have made aoil mnpa for about 



e~\- '- 



"-) ^iotril-ution of the Great Soil Areas in the United :;tntes and 



'a. ].abrador, uebec nnd the Maritime I rovinces, part of -ew jfing- 

 "** ntario: this is a glaciated &4ft& area from *iich the soils 

 iy been removed, leaving bare rock, or thin soils on level 

 -I elevated ground, filling depressions -with noils of 

 characters fro?^ coarse sand to clay. 



b. South along the sea coast from new Jersey to Texas: this is a 

 va- ~a of sandy lands crossed by river bottoms and Interrupted by 



B. The river bottoms have rich alluvial soil. The sands are mostly 

 poor sands. :hia area include? the Southern pinery. 



c. North of the Southern pine sands: a lr> i-ea of soila in 

 pi- mostly loam, clay and limestone areas. This includes the Appalo 



.3 and the Centra,! i!ardwood. Nearly -til the river valley a nre in 

 bottv. .do with deep alluvial soils, 



d North of the Central Hardwoods region of . : a large area 



icial drift v^iere ice and vr.-tcr h--ve arr- the mater- 

 isually in deep layers. It is a large area, in 



lly lands uouaily predominate! often the heaviest Imi4fi occupy, 

 not the bottoino, but the rid,:; B. It is quite a contrast to the ; >outham 

 ids. L Jack pii glaciated l^nda. ^rids o.re usually poor 



ions, as they leach readily. They may reach depths of 200 

 feet or -'ore. 



