148 AGRICULTURAL EXPERIMENT STATION. [Jau. 

 0:N^ FIELD EXPERIMENTS. 



I. Field experiments to compare the influence of an addition 

 of nitrogen in different combinations to the soil under cultivation, 

 on the general character of the crop and on the annual yield. 



II. Influence of fertilizers on the quantity and quality of 

 prominent fodder crops. 



III. Experiments with field and garden crops. 



IV. Experiments with green crops for summer feed of milch cows. 



V. Notes on miscellaneous field work. 



VI. Prof. James E. Humphrey's report on fungi, etc. 



I. Field Experiments to compare the Influence of 

 AN Addition of Nitrogen in Different Combina- 

 tions TO THE Soil under Cultivation, on the 

 General Character of the Crop and on the 

 Annual Yield. (Field A.) 



The area assigned to this investigation is the same which 

 has been used in preceding years to study our lands with 

 reference to the conditions of the inherent natural resources 

 of potash. The previous system of subdivision into plats, 

 one-tenth of one acre in size, is retained in all its details. 

 The record of each plat, as far as modes of cultivation and 

 of manuring are concerned, extends over more than five 

 successive years. This circumstance served as one of the 

 inducements to undertake the above-stated tasjv. 



Some plats had received during that period a supply of 

 nitrogen for manurial purposes in but one and the same 

 specified form, while others had received none in any form. 

 This condition of the various plats was turned to proper 

 account in our new plans. Several plats which for five 

 preceding years did not receive any nitrogen compound for 

 manurial purposes, were retained in that state to study the 

 efi'ect of an entire exclusion of nitrogen-containing manurial 

 substances on the crop under cultivation ; while the remain- 

 ing ones received, as before, a definite amount of nitrogen 

 in the same fomi in which they had received it in preceding 

 years, namely, either as sodium nitrate or as ammonium 

 sulphate, or as organic nitrogenous matter in form of dried 



