328 



On the Fuiliwe of the lied Clover. 



the headlands where the horses had turned round in the plough 

 ing. Upon the portion which had been beans four years ago the 

 red clover continued excellent until it was mown ; but the other 

 half was not worth keeping, and was ploughed up and sown with 

 beans. 



SOIL OF THE BAD CLOVER. 



Mechmiical Andifnis. 



Deposit in 3^ minutes . 

 Remainder .... 



100 



Chemical AnalijsU. 



Water of absorption . 



Water not expelled at 300", 



matter destructible by lieat 

 Sulp. lime . . « 



Chloride sodium 

 Vegetable matter (soluble) . 

 Siliceous and insoluble in hydr 



chloric and sulp. acids . 

 Alumina 

 Oxide iron 

 Carb. lime 

 Carb. magnesia 

 Phosp. lime (phos. acid -OuV) 

 Silicate of potash (potash • 17) 



and 



4-5 

 .3-5 



"■} 



}0-15 



0-10 



RO-5 



4-6 



4-65 



1 • 25 



0-25 



0-15 



0-35 



100- 



SOIL OF THE GOOD CLOVER. 



Deposit in 3^ minutes 

 Remainder 



Chejnical Analysis. 



Water of absorption . 4-5 



Water not expelled at 30;j^,| 



and matter destructible by > 3-5 



heat . . . j 



Sulp. lime . . • I 0-l( 



Chloride sodium . . J "^ 



^'egetable matter (soluble) . O'K 

 Siliceous sand insoluble ii " 



hydrochloric and sulp 



acids . . . 



Alumina . . 4-S 



Oxide iron , . 5 '3 



Carb. lime . . . 1* 15 



Carb. magnesia . . 0*45 



Pliosp. lime (phos. acid .00) 0'2 

 Silicate of potash (potash ,2) • 4 



90.V 



100 



79-50— ,55 



— 2 

 —',35 

 — ,1 

 + ,2 

 + •05 

 +•05 



100' 



An acre of 1 ton of red clover contains of potash, 45 lbs. ; soda, 12 lbs. ; lime, G3 lbs. ; 

 magnesia, 7 '5 lbs. ; alumina, 0*3 lbs. ; silica, 8 lbs. ; sulphuric acid, 10 lbs. ; phosphoric 

 acid, 15 lbs.; chlorine, 8 lbs. — (Lectures on Agricultural Chemistry, by J. F. W. 

 Johnston, p. 326.) 



The analyses of both soils are here given, and the comparison 

 shows the soil of the bad clover to be actually richer in gypsum 

 and common salt than the soil of the good clover ; it, however, 

 contains a little less magnesia, phosphate of lime, and of silicate 

 of potash. 



But by comparing the number of pounds weight of inorganic 

 substances required per acre, with any of the ingredients in which 

 the bad soil is deficient, it will be found that there existed in 

 the bad soil an ample quantity of each of them. Take the 

 quantity of phosphate of lime, the only one about which there 

 can be a doubt, the quantity in the analysis being 0"15 per cent., 

 and therefore of phosphoric acid 067 per cent. ; but a crop of 

 red clover requires only of phosphoric acid 15 lbs. weight per 

 acre ; and an acre of this soil 6 inches deep weighed on the 5th of 

 April 276G060 lbs., and therefore contained ISO lbs. weight of 



