ONIONS ON MUCK SOIL 



67 



the nitrogen, while large in amount, occurs in rather inert conditions, 

 which requires some time to be made available, but with good drain- 

 age and thoro tillage, this process gradually increases in activity, 

 and it may frequently be increased by light dressings of well rotted 

 stable manure. Four or five tons are sufficient. Phosphoric acid, 

 while not especially low in percentage, seems frequently to improve 

 the crop yields. The New York mucks in common with those of 

 adjacent regions in Canada seem to be very rich in lime, and it is 

 questionable whether lime is needed in this region. 



The Department of Soil Technology carried on three years' 

 investigation w^ith fertilizers in the Florida swamp at Breeze Hill, 

 Orange County. The average yield of onions for three years on the 



different plots is as follows: 



Yields 



1. Check 11,000 lbs. 



2. Sulfate of potash, 600 lbs 19,918 " 



3. Acid phosphate, 1000 lbs 19,086 



4. Nitrate of soda, 500 lbs 18,201 " 



5. Check 17,612 " 



6. Sulfate of potash, 600 lbs 



Acid phosphate, 1000 lbs 26,317 " 



7. Sulfate of potash, 600 lbs 



Nitrate of soda, 1000 lbs 21,131 



8. Acid phosphate, 600 lbs 



Nitrate of soda, 1000 lbs 19,056 " 



9. Check 13,207 " 



10. Check 14,302 " 



11. Sulfate of potash, 200 lbs 



Acid phosphate, 500 lbs 



Nitrate of soda, 500 lbs 22,371 " 



12. Sulfate of potash, 800 lbs 



Acid phosphate, 500 lbs 



Nitrate of soda, 500 lbs 24,517 " 



13. Sulfate of potash, 200 lbs 



Acid phosphate, 1500 lbs 



Nitrate of soda, 500 lbs 24,852 " 



14. Check 19,824 " 



15. Sulfate of potash, 1200 lbs 



16. Raw ground rock phosphate, 1000 lbs 16,211 " 



17. Raw ground rock phosphate, 2000 lbs 14,435 " 



18. Check 15,818 " 



