74 



BULLETIN 699, U. S. DEPARTMENT OF AGEICULTUEE. 



made in triplicate, the plots being so distributed as to reduce to a 

 minimum the errors due to inequalities in the soil. Each plot re- 

 ceived annually the same kind and quantity of fertilizer material. 

 In the case of the corn, cowpeas were grown as a catch crop in the 

 field. It is not stated whether this latter crop was turned under or 

 not. The results of these experiments are given in Tables XLI and 

 XLII. 



Table XLI. — Yields of shucked ears of corn (per acre) obtained at McNeill 

 branch station for 1907-1911, inclusive. 



Plot 

 num- 

 ber. 



12 



Fertilizer. 



Check 



Cottonseed mefal 



Acid phosphate 



Kainit 



/Cottonseed meal 



\Acld phosphate 



{Cottonseed meal 

 Acid phosphate 



/Cottonseed meal 



\ Acid phosphate 



/Cottonseed meal 



\Ground rock phosphate. 



Raw ground bone 



/Cottonsee'd meal 



\Reverted phosphate — 



Applica- 

 tion 

 per acre. 



Pounds. 



100 

 1(00 

 100 

 100 

 100 

 200 

 100 

 100 

 200 

 100 

 100 

 100 

 100 

 400 



Yield per acre of shucked ears. 



1906 



Pounds. 

 1,051 

 1,699 

 2,037 

 1,339 



'y 1, 886 

 > 1,944 



2,094 

 1,900 



1907 



Pounds. 



153 



740 



1,380 



713 



1,200 

 1,466 

 1,306 



1,526 

 1,473 



Pounds. 



66 



446 



846 



173 



1,073 

 1,200 



1,073 



Pounds. 

 560 

 860 

 840 

 520 



1,220 

 1,360 

 1,380 

 1,400 



Pounds. 



793 



1,406 



1,880 



1,072 



1,792 

 2,000 

 1,712 



I Fertilizer applications doubled in 1911. 

 Note.— Crop of 1909 was a failure. 



Table XLII. — Yields of seed cotton per acre obtained at McNeill branch station 



for 1907-1911, inclusive. 



Plot 

 num- 

 ber. 



Fertilizer. 



Applicar 



tion 

 per acre. 



Yield per acre of seed cotton. 



1908 



1909 



1910 1911 1 



Check 



Cottonseed meal 



Acid phosphate 



Kainit 



/Cottonseed meal 



\Acid phosphate 



/Cottonseed meal 



t Acid phosphate 



/Cottonseed meal 



\ Acid phosphate 



/Cottonseed meal 



iGround rock phosphate . 



Raw ground bone 



/Cottonseed meal 



(Reverted phosphate 



Lbs. 



100 

 100 

 100 

 100 

 100 

 200 

 100 

 100 

 200 

 100 

 100 

 100 

 100 

 400 



Lbs. 

 480 

 760 

 800 

 620 



I 1,060 



1,040 



I 1,000 



840 



1,6s. 

 220 

 436 

 514 

 300 



616 

 756 

 666 

 510 



Lbs. 

 110 

 376 

 744 

 274 



644 



636 



Lbs. 

 153 

 400 

 480 

 186 

 513 



620 



480 



520 



Lbs. 



20 



90 



366 



34 



326 

 306 

 254 



720 



680 



30 



63 



166 



8 



292 

 370 

 340 

 220 



1 All applications of fertilizer doubled in 1911. 



In these experiments the ground raw rock phosphate was applied 

 in such relatively small amounts that little effect could be expected 

 from its use. The yields of corn obtained from the raw rock cotton- 

 seed meal plot in 1908 and 1910, however, compare very favorably 



