The relationship between the proportion of manure derived nitrogen to total fertilizer and N surplus. Open symbols represent four dairy farms that were researched. The correlation was not significant, but there was a trend of a negative relationship (P = 0.2).

  
  Part of: Sato H, Uchida Y (2023) Different manure management methods impact on nitrogen use efficiency - comparison of four dairy farms in Hokkaido Japan. ARPHA Conference Abstracts 6: e107926. https://doi.org/10.3897/aca.6.e107926