Miscellaneous Products. 



240 



[September, 1908. 



section F. lias yielded a greater increase 

 with increase of fertilizer than any 

 other plot, as follows :— 



Value. 



42 24's equivalent to 262^ crates 



per acre at $1-65 ... $433*12 



17 30 s equivalent to 85 crates 



per acre at 1*65 ... 140 - 25 



Total gain on 24's 



and 30's ... 347* crates §573-37 



The decrease in 36's and 42's is as 

 follows : — 



Value. 



8 36's equivalent to 33-j crates 



per acre at $1-10 ... $43-33 



42 42's equivalent to 150 crates 



per acre at $110,.. ... 165-00 



Total loss on 36's 

 and 42's 



1831 crates $208 '33 



Subtracting this from $573-37 gives us 

 a gain per acre of $365-04. To get the 

 net gain we must still deduct from this 

 the cost of the extra fertilizer per acre, 

 including the cost of mixing and the 

 freight from Jacksonville, which for the 

 materials used on this plot (see Diagram 

 II., plot 19) would be $25 "83 (a little less 

 than the average extra expense on the 

 22 plots), and this leaves $339'16 clear 

 gain per acre, obtained by increasing the 

 fertilizer from 2,250 to 3,750 pounds. In 

 this connection it will be of interest to 

 learn which section* and which plott 

 have given the largest gross returns. On 

 calculating the yield per section to yield 

 per acre we find that section I. which 

 received slag phosphate, blood and high 

 grade sulphate gave the largest rteurns, 

 as follows : — 



117 24's equivalent to 182-8 crates 



per acre at $1-65 ... $301-62 



176 30's equivalent to 220'0 crates 



per acre at 1'65 ... 363-00 



83 36 s equivalent to 86-46 crates 



per acre at 1-30 ... 112 40 



10 42's equivalent to 9'00 crates 



per acre at 1-10 ... 9-90 



Total 



498-26 crates $786-92 



That is, section I. has yielded at the 

 rate of nearly 500 craters per acre which, 

 at the price assumed, would amount to 

 $786-92. But the four plots of this sec- 

 tion, as already explained, received 

 their fertilizer in gradually increasing 

 amounts, beginning with the first, and 

 consequently this amount does not re- 

 present the yield per acre from the best 



* To convert number per section to crates per 

 acre, multiply by J of 159 or 37'5 and divide 

 by the size. 



t To convert number per plot to crates per 

 acre, multiply by 150 and divide by the size. 



plot. On examination it is found that 

 plot 35, the third in section I., has given 

 larger total returns than any other plot 

 in the entire experiment as follows : — 



50 24's equivalent to 312* crates 



per acre at $r65 ... $515-625 



35 30's equivalent to 175 crates 



per acre at 1-65 ... 288*750 



12 36's equivalent to 50 crates 



per acre at 1-30 ... 65-000 



Total 



537* crates $869-375 



Plot 36 the fourth of the same section, 

 gives the following results : — 



3 18's equivalent to 25 crates 



per acre at $1'80 ... $45'00 



36 24's equivalent to 225 crates 



per acre at 1*65 ... 371-25 



39 30's equivalent to 195 crates 



per acre at 1-65 ... 321-75 



22 36's equivalent to 91 '66 crates 



per acre at T30 119'16 



Total .. 



536-66 crates $857-16 



This bears out the statement already 

 made that the limit of profitable fertiliz- 

 ing has been reached with the amount 

 applied to the third plot of the sections. 



Plot 47, section L., also furnishes some 

 interesting facts. It will be remembered 

 that this section was introduced for the 

 purpose of ascertaining what is likely to 

 prove the best raito for phosphoric acid, 

 nitrogen and potash. Already we have 

 seen that the third plot of this section 

 received these constituents in a ratio 

 which more closely approaches the 4, 5, 10 

 raito adopted for the experiment, than 

 any of the other plots of this section, 

 and also that it received the fertilizer at 

 the rate of 3,750 pounds per acre, which 

 is the amount that has in most cases 

 given the best results. 



And now in the crop from this plot we 

 have still further evidence on this point. 

 We find on examination that it has 

 yielded larger returns than any other 

 plot of the section, and that it is not 

 very far behind plots 35 and 36 of sec- 

 tion I. The results are as follows :— 



38 24's equivalent to 237*, crates 



per acre at $1*65 ... $391-875 



49 30's equivalent to 245 crates 



per acre at 1-65 ... 404 250 



9 36's equivalent to 37* crates 



per acre at 1-30 ... 48-750 



Total ... 



520 crates $844-87 



