The Wolmrn Field Experiments, 1911. 



387 



The very remarkable " rat-tailed " larva of Eristalis tenax 

 have often been sent for identification as occurring in stables, 

 and being possibly injurious to horses or cattle. These flies are 

 harmless but their grubs live in liquid manure or filthy water. 

 The mature insects much resemble bees, and are believed to 

 have given origin to the very ancient myth that bees could be 

 procured from filth or decaying carcasses. 



Sometimes the minute "water fleas" {Podura aquatica) 

 have caused alarm by occurring in vast numbers on water to 

 which cattle has access. Though themselves harmless, they no 

 doubt indicate an undesirable degree of foulness in the water 

 on which they occur, and on the scum of which they feed. 

 A more unusual cause of alarm proved on examination to be 

 caddis worms, which were suspected of possibly injuring the 

 cattle which drank the water containing them. These insects, 

 however, thrive in perfectly clear water and are entirely 

 harmless. 



Cecil Warburton. 



School of Agriculture, 

 Cambridge. 



THE WOBURN EXPERIMENTAL 



STATION OF THE ROYAL AGRICULTURAL 



SOCIETY OF ENGLAND. 



FIELD EXPERIMENTS, 1911. 



CONTINUOUS WHEAT 

 CONTINUOUS BARLEY 

 ROTATION EXPERIMENTS 

 EXPERIMENTS WITH NITROGENOUS TOP 

 GREEN-MANURING EXPERIMENTS . 

 EXPERIMENTS ON LUCERNE . 

 SUGAR-BEET EXPERIMENTS . 

 EXPERIMENT ON THE USE OF LIME IN 

 ''POTATO disease" EXPERIMENTS 

 EXPERIMENTS ON (U5ASS LAND 



RAINFALL AT WOBURN, 1911 . 



DRESSINGS 



ROTATION 



ON WHEAT 



PAGE 



388 

 392 

 393 

 39() 

 397 

 398 

 399 

 403 

 403 

 403 

 404 



FIELD EXPERIMENTS, 19n. 



The season 1911 was one of very exceptional nature, a prolonged 

 drought such as that which characterised the summer of 1911 

 not having Ijeen experienced for many years. 



In many ways this was a benefit to heavy land, and 

 resulted in the production, on such land, of exceptionally good 

 corn crops, but on light sandy laml, such as that at Woburii, 

 the drought was very severe in its effects. This was more 



c c 2 



