Division of Agriculture. 



WILLIA3r P. BROOKS. 



MANURIAL REQUIREMENTS OF CROPS. 



The results and conclusions stated in this bnlletin are based upon 

 experiments begun in 18S9 and continued until the present time. A 

 complete account of these experiments will be published in a later 

 bulletin, where also will be found a statement of the leading results 

 of similar experiments both in this and other countries as well as 

 the summary, conclusions and practical advice herein given. The 

 experiments have been conducted solely with reference to gaining 

 light as to the particular requirements of different crops upon various 

 soils. The fertilizers applied to the several plots, under the usual 

 arrangement, have been the same from year to year, and were as 

 follows : — 

 Plot 1. Nothing. 



" 2. Nitrate of soda (160 lbs. per acre), furnishing nitrogen. 

 " 3. Dissolved bone-black (320 lbs. per acre), furnishing phos- 

 phoric acid. 

 " 4. Nothing. 



5. jNIuriate of potash (160 lbs. per acre), furnishing potash. 

 Nitrate of soda (1(30 lbs. per acre). 



>issolved bone-black (320 lbs. per acre). 

 Nitrate of soda (160 lbs. per acres). 

 Muriate of potash (320 lbs. per acre). 

 8. Nothing. 



J f Dissolved bone-black (320 lbs per acre). 

 ■ I Muriate of potash (160 lbs per acre). 

 ( Nitrate of soda (160 lbs. per acre). 



10. < Dissolved bone-black (320 lbs. per acre). 

 ( Muriate of Potash (160 lbs. per acre). 



11. Plaster (160 lbs. p^r acre). 



12. Nothing. 



f Ni 

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