“yield decrease”

Claim · model-written summary

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.

Taxon

riceOryza sativat0

Outcome

growth and yielde6

Qualifier

retardation of nitrification of inorganic nitrogene6

Verbatim

t0

“Rice Yield Decrease”

e6

“the better growth and yield of rice in the first year of direct sowing culture are attributed to the retardation of nitrification of inorganic nitrogen inthe soi1 in the early stage of upland conditions”

Claim · model-written summary

The ratio of nitrate nitrogen to total inorganic nitrogen in soil was lower in the first-year plot.

Taxon

riceOryza sativat0

Treatment

first year plote4

Outcome

ratio of nitrate nitrogen to total inorganic nitrogen in the soile4

Direction

lowere4

Not reportedComparator

Verbatim

t0

“Rice Yield Decrease”

e4

“Accordingly, the ratio of nitrate nitrogen to total inorganic nitrogen in the soil was lower in the first year plot”

Claim · model-written summary

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.

Taxon

riceOryza sativat0

Treatment

first year plote0

Outcome

the plant growth in the early stage and the yielde0

Direction

greatere0

Qualifier

all nitrogen applicaltion levelse1

Comparator

long term plotse0

Setting

wel1-drained paddy fieldse2

Verbatim

t0

“Rice Yield Decrease”

e0

“Both the plant growth in the early stage and the yield were greater in the first year plot than in the long term plots”

e1

“These results were observed for all nitrogen applicaltion levels in this experment”

e2

“The experiment wes carried out on wel1-drained paddy fields from 1968 to 1970”

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

riceOryza 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”

Claim · model-written summary

Soil ammoniacal nitrogen was higher in the first-year plot than in the long-term plot in the early upland stage.

Taxon

riceOryza sativat0

Treatment

first year plote3

Outcome

amount of ammoniacal nitrogene3

Direction

highere3

Qualifier

in the early stage of upland conditione3

Comparator

long term plote3

Verbatim

t0

“Rice Yield Decrease”

e3

“In the first year plot, the amount of ammoniacal nitrogen was higher and the amount of nitrate nitrogen was lower than in the long term plot, in the early stage of upland condition”

Claim · model-written summary

Soil nitrate nitrogen was lower in the first-year plot than in the long-term plot in the early upland stage.

Taxon

riceOryza sativat0

Treatment

first year plote3

Outcome

amount of nitrate nitrogene3

Direction

lowere3

Qualifier

in the early stage of upland conditione3

Comparator

long term plote3

Verbatim

t0

“Rice Yield Decrease”

e3

“In the first year plot, the amount of ammoniacal nitrogen was higher and the amount of nitrate nitrogen was lower than in the long term plot, in the early stage of upland condition”