216 



On the Physical Properties of Soil. 



KINDS OF EARTH, 



Sterile Clay-Soil from the Liineburg district — 77.8 per cent, 

 of siliceous sand and silica, 8.1 of oxide of iron (with much 

 protoxide), 4.4 of humus and volatile matter, without car- 

 bonate of lime. 



Fertile Arable Soil of the corn-fields near Stuttgart— 70.6 

 per cent, of clay, 25 .2 of siliceous sand, 1.2 of lime, and 7.8 

 of humus with volatile portions. 



Vineyard Soil of Uhlbach, in the valley of the Neckar — 50 

 per cent, of siliceous sand with slate particles, 46 of clay, 3 of 

 lime, with 7 of humus and volatile portions. 



Fertile Arable Soil of the corn-fields of the valley of the 

 Neckar, near Tubingen — 64.7 per cent, of clay, 17.2 of si- 

 liceous sand, 16.4 of lime with calcareous sand, and 9.8 of 

 humus with volatile portions. 



Fertile Arable Soil of the corn-fields near Schwenningen, 

 at the source of the Neckar — 63.6 per cent, of clay, 17.3 of 

 siliceous sand, 4.1 of lime and calcareous sand, and 5.6 of 

 humus and volatile matter. 



Good Meadov\^ Land of Bebenhausen — 46.7 per cent, of clay, 

 46 of sand, 3 of carbonate of lime, and 4 . 5 of humus and vola- 

 tile matter. 



Good Meadow Land of Lustnau, in the valley of the Neckar — 

 48 per cent, of clay, 20.8 of siliceous sand, 29.6 of fine lime 

 with calcareous sand, and 6.3 of humus with volatile matter. 



Very fertile black Soil from the upper region of the Suabian 

 Alps, on the Jura limestone — 47 per cent, of clay, 1.2 of 

 siliceous sand, 33.8 of calcareous sand with lime, 4.6 of so- 

 luble humus, and 13.1 of volatile portions. 



Light Garden-Mould, abounding in vegetable matter and 

 sand, excellent for the cultivation of heaths, proteas, and 

 similar plants of the Cape — 1 .6 per cent, of lime, 18.6 of (for 

 the most part) vegetable volatile matter ; the remainder being 

 sand, containing clay. 



A Garden -Mould, similar to the last, excellent for the cultiva- 

 tion of many of the New Holland shrubs, several kinds of the 

 Metrosideros, Melaleuca, and similar plants — 21 per cent, of 

 volatile matter, with 15,5 of lime; the remainder being clayey 

 sand. 



Very light Soil, (but little adapted however for the general 

 cultivation of plants,) from the valley of the Neckar, near 

 Lustnau — 42.7 per cent, of clay, 10.8 of siliceous sand, 38 

 of lime with much calcareous sand, 8.4 percent, of humus 

 with volatile matter ; consistence, very shght. 



