1891.] 



PUBLIC DOCUMENT — No. 33. 



153 



The results of our first season of observation, 1889, re- 

 garding the influence of nitrogen-containing manurial sub- 

 stances on the character and on the quantity of the fodder 

 corn raised under otherwise corresponding circumstances, al- 

 though not without some interest, were not decisive enough 

 to advise a detailed explanation of causes. The larger part 

 of the summer season of 1889 with us was cold and wet, ind 

 for this reason of an exceptionally unfavorable character for 

 the raising of fodder corn. How much this circumstance 

 has affected our first results, is difficult to decide. Not less 

 difficult is it to decide, at this stage of observation, how 

 much the special conditions of various plats may yet control 

 the results. The comparatively low yield of ears and the 

 large percentage of undeveloped ears, on plats 4, 7, 9, which 

 received no nitrogen-containing manurial matter, was, how- 

 ever, very marked. 



1890. — During the past season, oats was chosen as the 

 crop for our trial. The field was prepared by ploughing in 

 the fall and in the spring, previous to the manuring. The 

 same kind and the same quantity of manurial substances were 

 applied broadcast to the different plats as in the preced- 

 ing year shortly before seeding. 



Plat 6, 



Plat 7, 

 Plat 8, 



Plat 9, 

 Plat 10, 



800 lbs. of barn-yard manure, 32 lbs. of potash-magnesia sulphate and 



18 lbs. of dissolved bone-black. 

 29 lbs. sodium nitrate ( = 4 to 5 lbs. nitrogen), 25 lbs. muriate of 



potash (= 12 to 13 lbs. potassium oxide), and 50 lbs. dissolved 



bone-black (= 8.5 lbs. available phosphoric acid.) 

 29 lbs. sodium nitrate (= 4 to 5 lbs. nitrogen), 48.5 lbs. potash- 

 magnesia sulphate (=12 to 13 lbs. potassium oxide), and 50 lbs. 



dissolved bone-black (=8.5 lbs. available phospboric acid). 

 43 lbs. dried blood (= 5 to 6 lbs. nitrogen), 25 lbs. muriate of potash 



(= 12 to 13 lbs. potassium oxide), and 50 lbs. dissolved bone-black 



(= 8.5 lbs. available phospboric acid). 

 25 lbs. muriate ot potash (= 12 to 13 lbs. potassium oxide) and 50 



lbs. dissolved bone-black (=8.5 lbs. available phosphoric acid). 

 22.5 lbs. ammonium sulphate (= 4 to 5 lbs. nitrogen), 48.5 lbs. potash- 

 magnesia sulphate (= 12 to 13 lbs. potassium oxide), and 50 lbs. 



dissolved bone-black (= 8.5 lbs. available phosphoric acid). 

 22.5 lbs. ammonium sulphate (= 4 to 5 lbs. nitrogen), 25 lbs. muriate 



of potash (= 12 to 13 lbs. potassium oxide), and 50 lbs. dissolved 



bone-black (= 8.5 lbs. available phosphoric acid). 

 25 lbs. muriate of potash (= 12 to 13 lbs. potassium oxide) and 50 



lbs. dissolved bone-black (= 8.5 lbs. available phosphoric acid). 

 22.5 lbs. ammonium sulphate (= 4 to 5 lbs. nitrogen), 25 lbs. muriate 



of potash (= 12 to 13 lbs. potassium oxide), and 50 lbs. dissolved 



bone-black (= 8.5 lbs. available phosphoric acid). 

 25 lbs. muriate of potash (= 12 to 13 lbs. potassium oxide) and 50 



lbs. dissolved bone-black (= 8.5 lbs. available phosphoric acid). 

 43 lbs. dried blood (= 5 to 6 lbs. nitrogen), 48.5 lbs. potash-magnesia 



sulphate (= 12 to 13 lbs. potassium oxide), and 50 lbs. dissolved 



bone-black (= 8.5 lbs. available phosphoric acid). 



