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Soluble in dilute acetic acid. Soluble iu strong liydrocliloric acid. Completely soluble in dilute acetic acid. ( 1 - 4 . ) SOIL III. Hygroscopic w a te r ......................................................... 6-.03O Organic su b stan c e....................................................... 14’910 Silicic a c i d .....................................................................0'034 Sesquioxide of iron......................................................... 0'332 A lu m in a .......................................................................... O'llO L im e ......................................................................... M46 Magnesia......................................................................... 0'091 Carbonic a c i d ............................................................... 0'767 Sulplmric a c i d ...............................................................O'OeO C b lo r in e .......................................................................... 0'042 S a n d ............................................................................. 20-100 A lum in a ................................................................... 22-790 Sesquioxide of iron....................................................... 28-318 L im e ................................................................................2-188 Magnesia......................................................................... - P o ta sh ................................................................................0-155 S o d a ................................................................................0-055 Phosphoric acid (estimated in nitric acid solution) 0-620 98-648 SOIL IV.—CORAL. Hygroscopic w a te r ......................................................... (1-316 Organic su b stan c e ......................................................... 3-806 S a n d ............................................................................... 0-050 Sesquioxide of iron....................................................) A lum in a .....................................................................) L im e ........................................................................ 52-470 Magnesia................................................................... 1-686 P o ta sh ............................................................................ 0-064 S o d a ............................................................................... 0-243 Carbonic a c i d ........................................................ 42-866 Sulphuric a c i d ........................................................... 0'206 C h lo r in e ..........................................................................0-()20 Phosphoric acid (estimated in nitric acid solution) ()-()77 102-324 Completely soluble in dilute acetic acid. (1 - 4 . ) SOIL V.-CHA LK. Hygroscopic w-ater............................................ Organic su b stan c e............................................ S a n d ........................................................ Sesquioxide of iron - ....................................... t A lum in a ........................................................ j ! L im e ............................................................. Magnesia........................................................ P o ta sh ............................................................. S o d a ............................................................. Carbonic a c i d ............................................ Sulphuric a c i d .................................................. C h lo r in e ............................................................. . Phosphoric acid (estimated in nitric acid solution) 3 5 3 18-134 3-961 0-040 0-180 EXHAUSTED AND FERTILE SOILS. 43-355 0-638 0-074 0-059 35-912 Trace. 0-010 0-105 102-478 Analyses of Soil from Plot 3 and Plot 2 q/ the Experimental Farm of Lawes and Gilbert, at Rothamsted. l i y H e r m a n and L i e b i g . P l o t 3 .— A n e x h a u s t e d s o il, h a v i n g g r o w n w h e a t t h i r t y s u c c e s s iv e y e a r s w i t h o u t m a n u r e , c o r n a n d s t r a w b e i n g c a r r i e d off. (T h e p e rm a n e n t l y u n m a n u r e d p lo t . ) P l o t 2 . A fertile soil. This has also grown wheat thirty successive years. The corn and straw have heen carted off) and it has been hio-lily manured each year with farm-yard manure. “ Soluble in dilute acetic acid. Soluble in dilute hydrochloric acid after tlie solution in acetic acid. )IL (Top nine inches). P l o t 3. P l o t 2. Constituents Estimated. Exhausted Soil Fertile Soil P e r cent. P e r cent. Hygroscopic v -a te r ...................... . 1-825 .. . 1-810 Organic substance . . . 6-212 Silicic a c i d ................................. . 0-065 .. . 0-084 Oxide of iron and Alumina . . . 0-100 .. . 0-116 L i m e ............................................. . 2-065 .. . 1-785 M a g n e s ia ...................... . 0-025 P o t a s h ............................ . 0-041 Soda.................................................. . 0-012 .. . 0-019 Sulphuric a c i d ............................ . Traces. .. . 0-008 Phosphoric acid (in nitric acid) . . 0-075 .... 0-093 Silicic acid . . . . Oxide of iron and Alumina . . . 4-363 Lime . . . . M a g n e s ia ...................... P o ta s i) ............................................ . 0-070 Soda . . ■ . . Sulphuric a c i d ...................... 0-015 A A Iii' I : s i 14' 4 «j| : p :|;