Rothamsted Memoirs on Agricultural Chemistry and Physiology, Volume 11

acid acre agar Agric Agriotes amount amplitude aphids Aphis rumicis appear asparagine average bacteria barley beans benzene Bibio Broad Beans cells cent clay colonies colour concentration considerable correlation counts crops cultures curve dorsal effect endodermis Euonymus experimental experiments extract factors flagellum grain groups growth increase indicate inoculation insects larvae lime log H manure margin maximum mean medium method mites nitrate nitrogen normal observed obtained occurred Oligochaeta percentage period phenol phloem piercing organ plants plates plots posterior pots pre-swarmer present probably produced protozoa Pyridine quantity ratio root Rothamsted Rothamsted Experimental Station samples sclerite seed segment shoot shown soil solution species spiracles spores stylet substances sulphate sunshine superphosphate surface Table temperature toxic tubatoxin tubes unbranched unmanured vapour variance variation viviparous weight wheat wireworms xylem yield