Answer:
it is called a ledgar
Explanation:
Dont really know how to explain but hopefully it's right
 
        
                    
             
        
        
        
It is important to mention that "horizon" make reference to each layer that the soil has. Each of them has different characteristics which allow them to fulfill different roles. 
 If you want to plant the most appropriate horizon would be A. (A horizon) This is made up of mineral and decomposed matter and it presents a dark color. here many plats roots grown in.
        
             
        
        
        
Answer:
When soil available nitrogen is low, yield and protein content will be low. As nitrogen is applied beyond these levels the wheat plant will no longer use it to