CLOVER AS A PREPARATORY CROP FOR WJIEAT. 4^7 



Water 44.675 



*Organic matter 49.236 



Mineral matter 6.089 



100.000 



*Containing nitrogen 1.297 



Equal to ammonia 1.575 



Assuming the whole field to have produced 3| tons of clover- 

 roots per acre, there will be 99.636 pounds, or in round numbers 

 100 pounds of nitrogen in the clover roots from one acre ; or about 

 twice as much nitrogen as is present in the average produce of an 

 acre of wheat. 



The soil which had been separated from the roots was passed 

 through a sieve to deprive it of any stones it might contain. It 

 was then partially dried, and the nitrogen in it determined in the 

 usual manner by combustion with soda-lime, when it yielded .313 

 per cent, of nitrogen, equal to .38 of ammonia, in one combustion; 

 and .373 per cent, of nitrogen, equal to .46 of ammonia, in a second 

 determination. 



That the reader may have some idea of the character of this soil, 

 it may be stated that it was further submitted to a general analysis, 

 according to which it was found to have the following composition : 



General Composition of Soil No. I, (Good Glover.) 



Moisture 18.73 



*Organic matter 9.72 



Oxides of iron and alumina 13.24 



Carbonate of lime 8.82 



Magnesia, alkalies, &a 1.72 



Insoluble siliceous matter (chiefly clay) 47.77 



100.00 



*Containing nitrogen 313 



Equal to ammonia 380 



The second square yard from the brow of the soil where the 

 clover was bad produced 13 ounces of air-dry and partially clean 

 roots, or 1.75 tons per acre. On analysis they were found to have 

 the following composition : 



Glover roots, No. II, (Bad Glover.) 



Water 55.732 



♦Organic matter 39.408 



Mineral matter (ash) 4.860 



100.000 



♦Containing nitrogen 792 



Equal to ammonia 901 



