RELATION BETWEEN ELEMENTS AND NUTRIENTS 63 



* Leaves and stalk containing 30 per cent moisture. 



be approximately one-fifth greater than that made by a sixty-five- 

 bushel crop. In this way we can estimate the amounts of the 

 elements removed by various yields. 



The greater the yields the heavier the draft upon the soil. 



The figures in parentheses in the nitrogen column indicate the 

 total nitrogen content of the legume crops. Much of this nitrogen 

 is gathered from the air by means of bacteria in the nodules on 

 their roots. 



SOME INTERESTING AND PRACTICAL FACTS CONCERNING THE 

 FEEDING OF CROPS 



Distribution of the Elements in Plants. As a rule more nitro- 

 gen is contained in the grain than in the stalk or straw. Phosphorus 

 goes largely into the grain the potassium and calcium into the 

 stalk, straw and leaves. Calcium is found largely in the leaves. 



Relation Between Elements and Nutrients. Crops which 

 utilize large amounts of nitrogen are rich in protein. (Compare 

 the preceding table with the table of nutrients in the appendix.) 



