Abstract
Sypnosis Sub‐surface (drilled) placement of ammonium nitrogen produced better growth and yields of lowland rice than similar nitrogen applied on the soil surface (broadcast). Nitrogen content of rice plants and percentage recovery of the applied nitrogen also increased. Ammonium nitrogen drilled 2 to 4 inches into the soil, where reducing conditions developed 3 to 5 days after flooding, remained in the soil and was available to lowland rice. Surface nitrogen, applied by broadcast methods, did not promote the best growth of rice. Losses of surface applied nitrogen apparently occurred through processes of nitrification and subsequently denitrification.
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Claims 4
Claim · model-written summary
Subsurface ammonium placement improved rice growth over surface broadcasting.
Verbatim
e0“Sub‐surface (drilled) placement of ammonium nitrogen produced better growth and yields of lowland rice than similar nitrogen applied on the soil surface (broadcast)”
Claim · model-written summary
Subsurface ammonium placement improved rice yields over surface broadcasting.
Verbatim
e0“Sub‐surface (drilled) placement of ammonium nitrogen produced better growth and yields of lowland rice than similar nitrogen applied on the soil surface (broadcast)”
Claim · model-written summary
Rice nitrogen content increased with drilled ammonium placement.
- Taxon
- rice
Oryza sativae0 - Treatment
- Sub‐surface (drilled) placement of ammonium nitrogene1
- Outcome
- Nitrogen content of rice plantse0
- Direction
- increasede0
- Comparator
- similar nitrogen applied on the soil surface (broadcast)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen content of rice plants and percentage recovery of the applied nitrogen also increased”
e1“Sub‐surface (drilled) placement of ammonium nitrogen produced better growth and yields of lowland rice than similar nitrogen applied on the soil surface (broadcast)”
Claim · model-written summary
Recovery of applied nitrogen increased with drilled placement.
- Taxon
- riceOryza sativae1
- Treatment
- Sub‐surface (drilled) placement of ammonium nitrogene1
- Outcome
- percentage recovery of the applied nitrogene0
- Direction
- increasede0
- Comparator
- similar nitrogen applied on the soil surface (broadcast)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen content of rice plants and percentage recovery of the applied nitrogen also increased”
e1“Sub‐surface (drilled) placement of ammonium nitrogen produced better growth and yields of lowland rice than similar nitrogen applied on the soil surface (broadcast)”
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