PRINCIPLES OF AGRICULTURAL CHEMISTRY 



Effects of Manure. Some effects of manures are as follows: 

 (i) They make clay soils more porous, in better tilth and more 

 easily worked. (2) They make sandy soils more retentive of 

 moisture. (3) They improve the physical character of the soil 

 and make it better suited for plant growth. (4) They supply 

 nitrogen and other plant food. (5) They supply organic matter 

 which may aid soil bacteria to fix free nitrogen. (6) They are 

 lasting in their effects. 



