[Vou. IIL, No. Tt. 
718 SCIENCE. 
\ 
Results of Woburn rotation experiments. 
MANGOLDS. 
1877 — Plot No. 2. |} 1878 — Plot No. 4. | 1879 — Plot No. 1. || 1880 —Plot No. 3. || 1881— Plot No. 2. 
Sect. Manuring. i. hs La (—-—< 
Roots.| Tops./Total.||Roots.| Tops.|Total.|/Roots.| Tops. /Total.||Roots.| Tops.|Total.||Roots.| Tops.|Total. 
1 | 1000 lbs. cottonseed-meal | 6,920) 4,650 | 11,510} 29,475) 6,025 | 35,500|| 10,033] 4,739 | 14,772||43,820| 8,345 |52,165|| 50,023| 8,024 |58,047 
2 | 1000 lbs. maize-meal . . | 4,625] 3,925 | 8,550/| 26,350) 6,021 |32,371|| 9,998] 4,617 |14,610||34,231| 7,416 |41,647|| 48,667| 7,965 | 56,632 
3 | Ash and 2 of nitrogen of 
cottonseed-meal . . | 16,188) 7,575 | 23,763|' 40,820) 8,125 |48,945||17,676| 6,433 |24,109||/55,050| 8,306 | 63,356) 54,718) 9,100 | 63,818 
4 }Ash and nitrogen of 
maize-meal. . . . | 8,400/ 5,650 | 14,050) 28,537; 7,130 |35,667||12,847| 4,875 |17,722|/ 46,838) 7,420 | 54,258) 48,600) 8,356 | 56,956 
| 
BARLEY, AFTER MANGOLDS FED ON THE LAND. 
| 1878 — Plot No. 2. 1879 — Plot No. 4. 1880 — Plot No. 1. 1881 — Plot No. 3. 
Sect.| Manuring. 
| Grain.|Straw.| Total. ||Grain.|Straw.| Total. || Grain. |Straw.| Total. ||Grain.|Straw.| Total. 
1 | Nofertilizers . . .. . . ./]| 2,008 |} 3,182 | 5,140 || 1,781 | 2,966 | 4,747 || 1,947 | 2,782 | 4,729 || 2,256 | 3,067 | 5,323 
2 |Nofertilizers .. 1,880 | 3,165 | 5,045 |) 1,912 | 3,180 | 5,092 || 1,717 | 2,698 | 4,415 || 2,186 | 2,952 | 5,088 
3 | Nitrate of soda, containing 3 the 
nitrogen of 1000 lbs. cotton- 
seed-meal .... . | 2,291 | 3,825 | 6,116 || 2,085 | 3,132 | 5,217 || 1,897 | 2,989 | 4,886 || 2,267 | 3,158 | 5,425 
4 |Nofertilizers . . . . . . «| 1,750 | 3,195 | 4,945 || 1,548 | 2,624 | 4,167 || 1,575 | 2,480 | 4,055 || 2,316 | 2,827 | 5,143 
WHEAT, AFTER GRASS FED ON THE LAND. 
1878 — Plot No. 1. 
Sect. | Manuring. 
| Grain. Straw. | Total. 
Le i28: ibs. cottonseed-meali.s .-3 s « «© % « + « sp en CoN. 2 0% 2,177 4,874 7,051 , 
2 |7281lbs. maize-meal . Peto oe Aube 6 eo oe amr Cee 2,304 4,623 6,927 
3 | Fertilizers containing ash and nitrogen of 728 lbs. " cottonseed-meal Pe ee eee 2,686 6,376 9,052 
4 | Fertilizers containing ash and nitrogen of 728 lbs... malze-mealige sep cas 2) 6 2,118 5,479 7,597 
1879 — Plot No. 3. 1880 — Plot No. 2. 1881 — Plot No. 4. 
Sect. Manuring. | 
Grain. | Straw. | Total. || Grain. | Straw. | Total. || Grain. | Straw. | Total. 
| 
1 || 672 lbs. cottonseed-meal . ... =. . . « «| S084 5,793 7,677 1,033 3,676 4,709 2,997 4,700 7,697 
2 | 728 lbs. maize-meal. . 1,931 | 5,991 | 7,922 || 1,201 | 4,100 | 5,301 || 3,077 | 4,717 | 1,794 
3 | Fertilizers equivalent to 672 lbs. cottonseed- meal 2,034 7,168 9,202 999 4,218 5,217 3,114 5,369 8,483 
4 | Fertilizers equivalent to 728 lbs. maize-meal. .| 2,022 6,377 8,399 1,116 3,976 5,092 2,943 5,149 8,092 
cultivated, seeded, and otherwise treated, exactly 
alike; but no mention is made of the means adopted 
to secure accuracy in these respects. We are not told 
whether the composition of the fodders and fertilizers 
used was actually determined by analysis, or whether 
average composition was assumed for them. We 
have no comparison of the crops on the several sec- 
tions as to the proportion of water they contained 
when weighed. Above all, we have no proof of the 
uniform quality of the land, and no knowledge of its 
natural capacity, as neither unmanured plots nor 
duplicate manurings were employed. 
Under these circumstances, it is evident that no 
great weight can be given to small differences of 
yield, or to single results. On the other hand, a 
result which is repeated year after year, or which: is 
very striking in amount, may serve as the basis of at 
least tentative conclusions. 
Taking first the results on mangolds, we find, that, 
in every case, the manuring with cottonseed - meal 
was followed by a larger crop than was that with 
corn-meal; further, that in every case the fertilizers 
equivalent to the cottonseed-meal were followed by 
a larger crop than were those equivalent to the corn- 
meal ; finally, that in every case but one (1881 — 
Plots 2 and 4) the commercial fertilizers were followed 
by a heavier crop than was the corresponding stable- 
manure. 
Taking next the barley, and taking the figures as 
they stand, in three cases out of four the manuring 
with cottonseed-meal was followed by a larger yield, 
both of grain and of total crop, than was that with 
corn-meal. 
In three cases out of four the grain, and in every 
case the total crop, were greater after the fertilizers 
equivalent to the cottonseed-meal than after those 
