April 1933] fertilizer experiments on "run-out" hay land 



17 



manure is applied with limestone, it lessens the neutralizing effect of 

 (he limestone, especially during the first two or three years. This ef- 

 fect is especially marked with the heavier applications of limestone 

 (Fig. 5). 



The effect of top-dressings with nitrate of soda in decreasing soil 

 acidity is shown in Fig. 4. The effect of the dressing, however, does 

 not appear to be markedly accumulative. 



Year 



Fig. ^. Manure in both two and four-ton anwuiits decreased the neutral- 

 izing efficiency of lime when the two ivere applied together 



III CHEMICAL ANALYSIS OF SOILS 



The soils of this field, including the hay and alfalfa experimental 

 areas, are part of a number from various sections of the state that are 

 being subjected to complete chemical analysis. Part of the results for 

 these soils is presented in Table IX. 



Table IX — Chemical a7ialyscs of hay a)ul alfalfa soils 



Compared with other soils, the total supply of these three elements 

 is fairly large. The lack of fertility in this soil is certainly due in part 

 to the small amounts of these elements present in an available form. 

 This condition is improved considerably by plowing and by the addi- 

 tion of readily decomposed organic matter and lime, all of which tend 

 to increase bacterial activity. 



