igS 



Bulletin 307 



Stable manure 



Correlation of quantity and frequency of application. — The extensive use 

 of stable manure enables one to learn something concerning the corre- 

 lation of quantity with the frequency of application. When very little 

 manure is used, it is applied at rare intervals, which amounts practically 

 to the use of none at all. When 5 to 10 loads per acre are used, it is the 

 general practice to apply such quantities every year, although a tendency 

 to apply such amounts every two years is shown. When larger quant;ties 

 are used, the custom is to make the application once in two years. This 

 is due, undoubtedly, to the habit of apple trees to bear normally every 

 other year, and the manure is applied the year before the crop is expected. 

 In general, 5 to 10 loads per acre are applied every year or larger amounts 

 every other year. 



TABLE 27. Correlation of Quantity and Frequency of Application of 



Stable Manure 



Quantity per acre 



Frequency of application 



Every 

 year 



Every 

 2 years 



Every 

 3 years 



Occa- 

 sionally 



Total 



no. of 



orchards 



Less than 5 loads 



5-10 loads 



10-15 loads 



15-20 loads 



20-25 loads 



30 + 



Total 



5 



34 



23 



13 



8 



2 



4 

 26 



33 

 14 

 II 



4 



14 

 8 



4 



3 



30 



10 



8 



I 



2 

 I 



85 



92 



35 



52 



39 

 76 



78 



36 



25 

 10 



264 



Relation of quantity and frequency of application to yield and income. — 

 The effect of the quantity and frequency of application of stable manure 

 on yield per acre and income per acre is shown in Table 28. Although 

 the figures in this table are not based on sufficiently large numbers of cases 

 to warrant any very definite conclusions, certain tendencies may be noted. 

 No good results may be expected from the application of less than 5 loads 

 per acre, especially if that is applied only occasionally (less than once in 

 three years), as shown by a four- year average yield of 39 barrels per 

 acre, and an income of $70 per acre. If manure is applied only occa- 

 sionally, it is better to apply it in large quantities, i. e. 20 loads or more 

 per acre, which shows a yield of 77 barrels and an income of $174.80 per 



