74 BULLETIN 699, U. S. DEPARTMENT OF AGRICULTURE. 
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. 
Yield per acre of shucked ears. 
Plot Applica- 
num- Fertilizer. tion ‘ 
ber. Per acre. | 1906 1907 1908 1910 19111 
: Pounds. | Pounds. | Pounds. | Pounds. | Pounds. | Pounds. 
Ib I OWS Ss oe peoendassocpobHooodospsallacsauseace 1,051 153 66 560 793 
2 | Cottonseed meal..........--------- 100 1, 699 740 446 860 1, 406 
3 | Acid phosphate.......-.-.----.---- 100 2,037 1,380 846 840 1, 880 
Aa Camb ena ices So eee ion 1,339 713 173 520 1, 072 
Cottonseedimealy ase ee oe eee 
5 {nid hos paele pap NOE Sat re, AG MA Cr ou \ 1, 886 1, 200 ae 073 1, 220 1, 792 
Cottonseed meal.............--.--- 
7 {eid Dee: Bi a Ta vee ea EE eS \ 1, 944 1, 466 1, 200 1, 360 2, 000 
Cottonseed meals. 3-22 eee eee 
Acid phosphate RCE Aa tien ace ones Das Pail 200 \ 1, 807 1, 306 860 it 380 1, 712 
Cottonseed meal........-...----.-.- NOOR Ry ee Ee a aes \ 1.073 1. 400 
Ground rock phosphate......-....- HUGO) t Secdaaiase Sohal Rouie Me ra yatalades ’ i 
Raw ground pone EE Ecorse se eersee ne 2,094 1526 L/S ees seep es 
Cottonseedimeale= 424s eso ee } 
12 \keverted Phosphates. aes ceeas se 400 1,900 1,473 |....------|---------- 2,020 
1 Fertilizer applications doubled in 1911. 
Notr.—Crop of 1909 was a failure. 
TABLE XLII.—Yields of seed cotton per acre obtained at McNeill branch station 
for 1907-1911; inclusive. 
Yield per acre of seed cotton. 
Plot Applica- 
num- Fertilizer. tion 
ber. per acre. | 1993 | 1907 | 1908 | 1909 | 1910 | 19111 
Lbs. Lbs. Lbs: Lbs. Lbs. Lbs. Lbs. 
MS CROC Ker ae ae tares ears a ete tere oreo ional later epane neers 480 220 110 153 20 30 
on Cottonseed meal... see eee ee 100 760 436 376 400 90 63 
3) PAcidiphosphater = sass s-6 6 eelasecine 100 800 514 744 480 366 166 
CW Rea hah megane Sais Pe Sy bp oe eS ae SE Ue ee er 100 620 300 274 186 34 8 
Cottonseed meal.......--.-.--+-+---- 100 \ 
5 Acid phosphate. peas. Soltis) far Son 100 1, 060 616 644 513 326 292 
Cottonseed meal..........-.---.---.- 00 
7 HK phosphate t sagsseceneeeeeee 10 \ 1,010] 756] 684) 620} 306] 370 
Cottonseed mealies. o-- a5: =o ee 
8h aeid Phosphate, /...sssssssseecse0 200 \1,000] 666 | 636] 480} 254] 340 
Cottonseed meal.:......-.-...-.-..:- 0 
10 \Groand rock phosphate........-...- 100 \ 840 510 |....---- 520 |.......- 220 
11 | Raw ground pore SOS NE Scare ee Ae ip th Gee Uy Aico oye vena 120 sce ee eee 
Cottonseedimealsrss Sa ae sie oaelhe ) chr OO} S5y5 5-5 |Er-e clare i 
12 |) Reverted phosphate.......-2.-.-.--- A004 {abet alas nee \ 680 |.....--. 460 |...--- . 
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 
