Claim · model-written summary
No significant differences in the amount and composition of soil inorganic nitrogen were found among the second-year, third-year and long-term plots.
- Taxon
- rice
Oryza sativat0 - Treatment
- second year plot, third year plote5
- Outcome
- amount of inorganic nitrogen and its compositione5
Verbatim
t0“Rice Yield Decrease”
e5“However there were no significant differences among the second year plot, third year plot and the long term plot, in relation to the amount of inorganic nitrogen and its composition”
Title
Yoshimasa UEMURA; Akira MIYASAKA; Mutsuo MORIYA Japanese Journal of Crop Science 1971. doi:10.1626/jcs.40.449
Other claims from this paper (5)
- Intervention effect Early-stage plant growth and yield of rice were greater in the first-year direct sowing plot than in long-term plots, at all nitrogen levels.
- Intervention effect Soil ammoniacal nitrogen was higher in the first-year plot than in the long-term plot in the early upland stage.
- Intervention effect Soil nitrate nitrogen was lower in the first-year plot than in the long-term plot in the early upland stage.
- Intervention effect The ratio of nitrate nitrogen to total inorganic nitrogen in soil was lower in the first-year plot.
- Mechanism The authors attribute the better early growth and yield of rice in the first year of direct sowing to retarded nitrification of soil inorganic nitrogen.