Abstract
Abstract A series of field experiments were conducted to determine the nature of the effects of green manures and rice crop residue management on lowland rice production. Winter leguminous green manure was determined to be an inexpensive, efficient source of nitrogen which fits in well with continuous rice culture in the Mediterranean type climate of California. The marked response of rice to leguminous green manure was duplicated, for the most part, by inorganic nitrogen applications when properly placed in the reducing zone of the rice soil. Leguminous green manure served to add nitrogen to the highly carbonaceous rice crop residues. This permits decomposition to proceed without tying‐up nitrogen needed by the subsequent crop, and provides a satisfactory alternative to the deleterious practice of burning the residues.
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Claims 5
Claim · model-written summary
Winter leguminous green manure was an inexpensive efficient nitrogen source compatible with continuous rice culture in California.
- Taxon
- rice
Oryza sativae0 - Treatment
- Winter leguminous green manuree0
- Outcome
- inexpensive, efficient source of nitrogene0
- Setting
- Californiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter leguminous green manure was determined to be an inexpensive, efficient source of nitrogen which fits in well with continuous rice culture in the Mediterranean type climate of California”
Claim · model-written summary
Properly placed inorganic nitrogen largely duplicated the rice response to leguminous green manure.
- Taxon
- riceOryza sativae0
- Treatment
- inorganic nitrogen applicationse0
- Outcome
- response of ricee0
- Direction
- duplicatede0
- Qualifier
- for the most parte0
- Comparator
- leguminous green manuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The marked response of rice to leguminous green manure was duplicated, for the most part, by inorganic nitrogen applications when properly placed in the reducing zone of the rice soil”
Claim · model-written summary
Leguminous green manure added nitrogen to carbonaceous rice residues.
- Taxon
- riceOryza sativae0
- Treatment
- Leguminous green manuree0
- Outcome
- nitrogen to the highly carbonaceous rice crop residuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leguminous green manure served to add nitrogen to the highly carbonaceous rice crop residues”
Claim · model-written summary
Adding green manure allowed rice residues to decompose without immobilizing nitrogen needed by the next crop.
- Taxon
- riceOryza sativae1
- Treatment
- Leguminous green manuree1
- Outcome
- decomposition to proceed without tying‐up nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This permits decomposition to proceed without tying‐up nitrogen needed by the subsequent crop”
e1“Leguminous green manure served to add nitrogen to the highly carbonaceous rice crop residues”
Claim · model-written summary
Green manure offers an alternative to burning rice residues.
- Taxon
- riceOryza sativae1
- Outcome
- satisfactory alternative to the deleterious practice of burning the residuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“provides a satisfactory alternative to the deleterious practice of burning the residues”
e1“Leguminous green manure served to add nitrogen to the highly carbonaceous rice crop residues”
The same questions in other papers
nitrogen · organism · Oryza sativa (rice)Positive and negative results
44 papers in the same direction as this paper · 14 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
57 papers more in this group
See all 61 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.