NORTH-CAROLINA GEOLOGICAL SUKTEY. 



Earthy phosphates, 20.60& 



Garb, of Lime, 30.950 



Chlorine, 1.845 



Sulphuric acid, 0.495 



If a ton of this hay or a plant in its green state was ploughed 

 in, it would add the following amount of elements reckoned 

 in pounds as follows : 



Potash, , 32.153 



Soda, ,... . . ., . 18.394 



Earthy phosphates, 25.544 



Carbonate of lime, 38.378 



Magnesia, 4.873 



Chlorine, , 2.288 



Sulphuric acid, 0.624 



/ Silica, 1.054 



Amounting to 123.508 Ibs. 



44. It is not perhaps possible to estimate the real value 

 of a clover crop as a fertilizer. Two hundred pounds of guano 

 cost $5. May we not infer that its value exceeds that of this 

 popular fertilizer, especially when it is considered that the 

 organic part must exercise considerable influence and always 

 furnishes a large amount of food ? It is true that new ele- 

 ments are added by the clover, but then the cost of the crop 

 is trifling, and the effects are more lasting than guano in this 

 climate. 



The clover crop is from two and a half to three tons per 

 acre of dry hay. It is more profitable to feed cattle upon it 

 before it is ploughed. By this course or plan of treatment 

 the manure which is added by feeding cattle nearly suffices 

 for the diminished amount of clover consumed. It is not re- 

 garded as expedient to plough in a very heavy green crop of 

 any kind. It is better to feed it in part, if there were no 

 valuable returns in meat or flesh. 



On account of the grain in food for cattle the clover crop 

 is preferable to buckwheat, and yet this plant is rich in fer- 

 tilizing products. 



45. In the South the heavy or large stalks of corn are 



