Abstract
SUMMARY A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8. Nitrogen-enriched coal supplied very little nitrogen to rice. All other materials were superior to urea. Largest yield of rough rice and nitrogen uptake was obtained with IBDU. The yield of rough rice given by AM-fertilizer was equal to that with IBDU in 1968; in that year both AM-fertilizer and N-serve treated urea supplied as much N to the crop as IBDU. Yield of straw showed no significant difference between these three materials in either year. Ammoniacal and nitrate nitrogen in soil at flowering and at harvest of the rice was most in plots receiving IBDU followed by those receiving AM-fertilizer, N-serve treated urea and urea. Mineral nitrogen in plots receiving N-enriched coal was only slightly more than in control plots.
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Claims 8
Claim · model-written summary
Nitrogen-enriched coal supplied very little nitrogen to rice
- Taxon
- rice
Oryza sativae0 - Treatment
- Nitrogen-enriched coale1
- Outcome
- supplied very little nitrogene1
- Direction
- lowerinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e1“Nitrogen-enriched coal supplied very little nitrogen to rice. All other materials were superior to urea”
Claim · model-written summary
All other N fertilizer materials were superior to urea for rice
- Taxon
- riceOryza sativae0
- Treatment
- All other materialse1
- Outcome
- superiore1
- Direction
- superiore1
- Comparator
- ureae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e1“Nitrogen-enriched coal supplied very little nitrogen to rice. All other materials were superior to urea”
Claim · model-written summary
IBDU gave the largest rough rice yield and nitrogen uptake
- Taxon
- riceOryza sativae0
- Treatment
- IBDUe2
- Outcome
- yield of rough rice and nitrogen uptakee2
- Direction
- Largeste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e2“Largest yield of rough rice and nitrogen uptake was obtained with IBDU”
Claim · model-written summary
AM-fertilizer gave rough rice yield equal to IBDU in 1968
- Taxon
- riceOryza sativae0
- Treatment
- AM-fertilizere3
- Outcome
- yield of rough ricee3
- Direction
- equal toe3
- Qualifier
- in 1968e3
- Comparator
- IBDUe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e3“The yield of rough rice given by AM-fertilizer was equal to that with IBDU in 1968; in that year both AM-fertilizer and N-serve treated urea supplied as much N to the crop as IBDU”
Claim · model-written summary
AM-fertilizer and N-serve treated urea supplied as much N to the crop as IBDU in 1968
- Taxon
- riceOryza sativae0
- Treatment
- AM-fertilizer and N-serve treated ureae3
- Outcome
- supplied as much N to the crope3
- Direction
- as muche3
- Qualifier
- in that yeare3
- Comparator
- IBDUe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e3“The yield of rough rice given by AM-fertilizer was equal to that with IBDU in 1968; in that year both AM-fertilizer and N-serve treated urea supplied as much N to the crop as IBDU”
Claim · model-written summary
Straw yield did not differ significantly among the three best N materials
- Taxon
- riceOryza sativae0
- Outcome
- Yield of strawe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e4“Yield of straw showed no significant difference between these three materials in either year”
Claim · model-written summary
Soil ammoniacal and nitrate nitrogen was highest in plots receiving IBDU in rice
- Taxon
- riceOryza sativae5
- Treatment
- IBDUe5
- Outcome
- Ammoniacal and nitrate nitrogen in soile5
- Direction
- moste5
- Qualifier
- AM-fertilizer, N-serve treated urea and ureae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Ammoniacal and nitrate nitrogen in soil at flowering and at harvest of the rice was most in plots receiving IBDU followed by those receiving AM-fertilizer, N-serve treated urea and urea”
Claim · model-written summary
Mineral nitrogen in N-enriched coal plots was only slightly higher than in control plots
- Taxon
- riceOryza sativae0
- Treatment
- N-enriched coale6
- Outcome
- Mineral nitrogene6
- Direction
- only slightly moree6
- Comparator
- control plotse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field experiment was made on a sandy clay loam soil during the rainy seasons of 1967 and 1968 to study the relative efficiency of urea, N-serve treated urea, AM-fertilizer, IBDU fertilizer and nitrogen-enriched coal for the rice variety IR-8”
e6“Mineral nitrogen in plots receiving N-enriched coal was only slightly more than in control plots”
The same questions in other papers
mycorrhiza · yield · Oryza sativa (rice)Results differ
3 papers in the same direction as this paper · 57 in the opposite direction
- positive
- positive
- positive
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.