Soil nitrogen. VII.—correlations between measurements of nitrogen status of soils and nitroǵn % and nitroǵn content of crops

✍ Scribed by J. K. R. Gasser; R. J. B. Williams

• Publisher: John Wiley and Sons
• Year: 1963
• Tongue: English
• Weight: 631 KB
• Volume: 14
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/jsfa.2740140411

✦ Synopsis

Abstract

Laboratory measurements of ‘available’ soil‐N were used to try and assess its effect on dry matter, N content, and N% of ryegrass grown in pots, of barley and wheat seedlings grown in boxes and of barley grain from field crops grown on soils without fertiliser‐N.

Mineral‐N in the fresh soil (Mineral‐N~fresh~) and the increase when fresh or re‐wetted air‐dry soils were incubated (Δ Mineral‐N~fresh~ or Δ Mineral‐N~air‐dry~) were all significantly correlated with yields and N contents of ryegrass, barley and wheat seedlings and barley grain. These soil‐N measurements were also significantly correlated with N% in barley grain and sometimes N in ryegrass and in barley and wheat seedlings. Δ Mineral‐N~air‐dry~ was significantly correlated most often. Soil‐N measurements were correlated better with N contents of crops than with yields of dry matter.