produce ; these figures are far short of what has been obtained from 

 the same plots in certain previous years. The difference is presum- 

 ably the result of the fallow in Hoos Field, for all other conditions 

 were the same in both cases : this view is strengthened by the fact 

 that the unmanured plot on Agdell (which had virtually been fallowed 

 during the preceding year, the turnip crop having failed) gave 18*5 

 bushels of grain and 8 cwt. of straw, nearly the same yield as the 

 unmanured Hoos Field plot, 21 bushels of grain and 10 cwt. of 

 straw. Only where the turnip crop had grown in 1912 were the 

 yields markedly less than on Hoos Field. 



An interesting result was obtained on the two unmanured plots 

 in Agdell Field. On one of these the rotation is dead fallow, wheat, 

 swedes, barley ; on the other it is clover, wheat, swedes, barley. On 

 the manured plots the clover brings about an increase in the wheat, 

 but on the unmanured plot it usually exerts a depressing effect, 

 both on the wheat and the barley. This year, however, the result 

 was different; an increased crop was obtained on the unmanured 

 barley plot as well as on the manured plots as a result of growing 

 clover. The method of getting in the clover is to sow it broadcast 

 among the barley as soon as the barley is up : in some way, the 

 barley this year has benefited from the clover sown along with it. 



The wheat on the Broadbalk plots gave much better yields than 

 last year in consequence of there being less Alopecurits agrestis. The 

 plots are still far from being clean, however, and only the yields of the 

 lower cleaner half of the field are given in the Table. The variety 

 grown is the Square Head's Master, which is well adapted to our 

 conditions. At a width of 7f inches apart 33 rows were sown per 

 plot : :,: during the period 1906 — 1912 the rows had been set 12 inches 

 apart to facilitate hand hoeing: there were then 19 to 20 rows per 

 plot in alternate years. As in the case of the barley, nitrogenous 

 manures were found to hasten the formation of ear, plots receiving 

 such manures being distinctly earlier than the rest in heading out. 

 None of the yields were large : 28 bushels was the highest : this was 

 only secured on the most heavily manured plot. These yields are below 

 the average on Broadbalk. On the surrounding fields 36 bushels 

 were obtained, but even this is not exceptionally high: we have twice 

 on Broadbalk — in 1863 and 1864 — had as much as 50 bushels; in- 

 deed, in 1863 we got 56 bushels of grain and 10,000 lb. total 

 produce. On the Agdell Rotation Fields, however, the crops have 

 never been as large. These results are wholly exceptional, and 

 represent the combined effect of high manuring, good cultivation and 

 an unusually good season. In normal years our most intense scheme 

 of manuring yields only 40 to 45 bushels. Again the soil type seems 

 to be the limiting factor, and the lesson may be drawn that the best 

 cultivation and manuring is ineffective to push yields up beyond a 

 certain limit set by the season and the soil type. One might try to 

 push this limit higher and this is being done, but a no less useful line 

 of experiment is to try and secure these same yields at lower cost. 



*One afterwards had to be hoed up, leaving 32 per plot. 



