174 



HATCH EXPERIMENT STATION 



[Jan. 



Several plats (4, 7 and 9) which for five preceding ^^ears 

 (1884 to 1889) had not received any nitrogen compound for 

 manurial purposes, were retained in that state, to study the 

 eflect 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 form in which they had received it in preceding 

 years, namely, either as sodium nitrate (1, 2), as ammonium 

 sulphate (5, 6, 8), as organic nitrogenous matter in form of 

 dried blood (3, 10), or of barn-yard manure (0). 



A corresponding amount of available nitrogen was applied 

 in all these cases. 



1889-94. 



Annual Supply of Manurial Substances per Plat (1-10 of one Acre). 



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 60 lbs. 



dissolved bone-black (= 8.5 lbs. available phosphoric 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 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), 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. availalile 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 ll>s. potassium oxide), and 50 lbs. dissolved 



bone-black (= 8.5 lbs. availal)le 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 ll)s. pota?h-mairnesia 



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



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



Amount of Fenilizing Ingredients used annually 2:)er Acre. 



( Nitrogen, .... 45 pounds. 



Plats 0, 1, 2, 3, 5, t;, «, 10, I Phosphoric acid, 

 (^ Potassium oxide, 



{Nitrogen, 

 Phosphoric acid, 

 Potassium oxide, 



80 pounds. 



125 pounds 



none. 



80 pounds 

 125 pounds. 



