REPORT OF THE DIRECTOR 



17 



SESSIONAL PAPER No. 16 



EXPERIMENTS WITH FERTILIZERS ON PLOTS OF INDIAN CORN. 



Fertilizers applied each year from 1888 to 

 1898 or 1899. No fertilizers used from 

 that time to 1905. Clover sown in 1900 

 in place of the corn .I'ld ploughed under 

 in May, 1901, before tiie corn was planted. 

 In 1903 clover was again sown and 

 plouijhed under in May, 1904. In 1905-6 

 fertilizers again applied as in 1898. Clover 

 discontinued. 



Mincr.al phosphate, untreate J, fint-ly giound, 

 8o0 lbs. ixT acre, used each year from 

 1888 to 1897 inclusive. In 1898 and 1899 

 a similar weight of the Thomas phos- 

 phate was used. No fertilizer used from 

 inoO to 1905. In 1905-6 fertilizer agaiu 

 used as in 1809 



Mineral phosphate,\mtreated, finely ground, 

 SOO lbs., nitrate of soda, 2<0 lbs. per acre, 

 used each year from 18S8 to 1897 inclu 

 five. In 1S98 and 1899, 800 lbs. of the 

 Thomas' phosjjhate were used in place of 

 the mineral phosphate. No fertilizers 

 used from 1900 to 1905. In 1905-6 ferti 

 lizers again used as in 1899 



Birn-yard manure, partly rotted and acti- 

 vely fermenting, 6 tons per .acre, minerid 

 ])hosphate, untreated, finely ground, 500 

 lbs per acre, cumimsted together, intim- 

 ately mixed and allowed to heat for sev 

 eral days before using, applied each year 

 from 1888 to 1897 inclusive. In 1898^ 500 

 lbs. of Thomas' phosphate were used in 

 place of the mineral (jhosphate. No fer- 

 tilizers used from lSf>9 to 190c. In 1905-6 

 fertilizers again used as in 1893 



Mineral ph()sphate,untreated, finely ground, 

 500 lbs., nitrate of soda, 200 lbs., wood 

 ashes, unleachcd, 1,090 lbs. per acre, used 

 each year from 188S to 1897 inclusive. In 

 1898 and 1899, 500 lbs. of the Thoin.ns' 

 phosphate were used in place of the min- 

 eral phosphate. No fertilizers used from 

 1900 to 190.1. In 1905-6 fertilizers again 

 used as in 1899 



Mineral phosphate, untreat<?d. finely ground, 

 .500 lbs., wood ashes, unleached. 1,500 lb-. 

 per acre, used each vear from 1888 to 1897 

 inclusive. In 189S"and 1899 5C0 lbs. ol 

 the Thomas' y)!iosphate were used in jilaie 

 of the mineral phosphate. No fertilizers 

 used from 190 » to 1905. In 1905-6 ferti- 

 lizers again used as in 1899 



-Mineral supi^rphosphate. No. 1, 500 lbs. jicr 

 acre, used e.-uh year from 1888 to 1899 in- 

 c'usive. No fertiliz<r used fiom 1900 to 

 IliO"). In 1UCI5-6 fertilizer again used as 

 in 1899 



Mineral stiperphosphate. No. 1, 350 lbs., 

 nitrate of soda, 2(X) lbs. per acre, used 

 each year from 1888 to 1899 inclusive. No 

 fertilizi-rs used from 1900 to 1905. In 

 1905 fertilizers again used as in 1899. . . 



.Min-ral sup rphos))hate. No. 1, 350 lbs., 

 nitrate of soda, 200 lbs., wood ashes, un- 

 leached, 1,500 lbs. per acre, used each 

 year from 1888 to 1899 inclusive. No 

 fertilizers used from 1900 to 1905. In 

 l!>i^5-6 fertilizers again used as in 1899. . . 



16—2 



Average Yield 



FOR 



Fourteen Ye.\rs. 





bo 



o 



-4J 





Per acre. 



a 

 p 

 So 



o 



.2-- 





15th Season, 1906. 





, T! O . 

 J-^ «*-. "r ~ 





-+M 







Average Yield 



FOR 



Fifteen Years. 



d 



-M 



E 



a 



o 



u 

 bo 



o 

 15 <- 



Per acre! Per acre. 



Tons. lbs. 'Tons. lbs Tons. lbs. 



16 



770 



11 1721 



33-1 



15 348 



12 892 



11 1C48 



5 1567 



8 550 



Per acre Per acre. 



Tons, lbs Tons. lbs. 



6 1170 



9 1011 i 10 1010 9 79 



12 421 



11 826 



9 172C 



8 1876 



13 llio; 10 1261 



IG 515 



13 960 



11 750 



10 990 8 1910 



10 1450 



9 1409 



9 1300 



8 1340 



12 1130 12 50 



6 1840 



7 880 



10 300 



8 755 



11 15-10 



15 1975 12 223 



u 



. bo 



^ ° . 



HC1 



Per acre 



Tons, lbs 



5 1674 



9 0.19 



14 1841 



11 598 



12 631 



11 



791 



464 



9 1605 



8 1607 



10 836 



15 1979i 12 808 



