STRAWBERRY HAND-BOOK. IJ 



The Crop-Making Power of Fertilizers. It has been 

 found that the crop-making power of a manure or fertilizer 

 is no greater than its weakest ingredient. This means that 

 if a manure or fertilizer contains only a small amount of 

 one of the three fertilizing ingredients, it will not produce 

 good results or yields. 



As has been stated, one acre in strawberries during a 

 three years' growth, uses up 223 pounds of nitrogen, 83 

 pounds of phosphoric acid, and 375 pounds of potash. 

 Therefore, plants to do well must have these quantities. To 

 take these different elements from the soil without putting 

 them back sooner or later exhausts the soil. 



Again, farmyard manure made chiefly from grain and 

 hay is not well balanced in fertilizing ingredients for fruit. 

 For example, seven tons of farmyard manure of good 

 quality will give the following amounts of fertilizer: 



In an Acre Strawberries. In 7 Tons Manure. 

 Nitrogen, - - 223 Ibs. 77 Ibs. 



Phosphoric Acid, 83 Ibs. 57 Ibs. 



Potash, - - - 375 Ibs. 74 Ibs. 



Thus, fully thirty-five tons of farmyard manure would 

 be needed to furnish the required amount of potash for an 

 acre of strawberries, and even then if the season is favor- 

 able the excess of nitrogen produces rank growth of foliage 

 at the expense of the fruit. 



As we have pointed out, by the matted row system only 

 about two-thirds as many plants are set per acre as by the 

 hill or stool system, but the runners are allowed to grow so 



