Abstract
Like in other parts of Asia, irrigated, transplanted rice ( Oryza sativa L.) yield increases in Punjab, India, have slowed down in recent years. Further yield increases are likely to occur in smaller increments through fine‐tuning of crop management mainly by accounting for the large spatial and temporal variation in soil characteristics. On‐farm experiments were conducted from 2002 to 2004 at 56 sites in six key irrigated rice‐wheat ( Triticum aestivum L.) domains of Punjab to evaluate an approach for site‐specific nutrient management (SSNM). Field‐specific N–P–K applications were calculated by accounting for the indigenous nutrient supply, yield targets, and nutrient demand as a function of the interactions between N, P, and K. The performance of SSNM was tested for two rice crops. Compared with the current farmers' fertilizer practice (FFP), average grain yield increased from 5.1 to 6.0 Mg ha −1 , while plant N, P, and K accumulations increased by 13 to 15%. The gross return above fertilizer cost (GRF) was about 14% greater with SSNM than with FFP. Improved timing and/or splitting of fertilizer N increased N recovery efficiency from 0.20 kg kg −1 in FFP plots to 0.30 kg kg −1 in SSNM plots. The agronomic N use efficiency was 83% greater with SSNM than with FFP. The year‐wise effect on all parameters was, however, nonsignificant. As defined in our study, SSNM has potential for improving yields and nutrient efficiency in irrigated, transplanted rice.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
SSNM raised average grain yield from 5.1 to 6.0 Mg ha −1 versus FFP.
- Taxon
- rice
Oryza sativat0 - Treatment
- SSNMe1
- Outcome
- average grain yielde0
- Direction
- increasede0
- Value
- 5.1 to 6.0 Mg ha −1e0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with the current farmers' fertilizer practice (FFP), average grain yield increased from 5.1 to 6.0 Mg ha −1”
e1“The gross return above fertilizer cost (GRF) was about 14% greater with SSNM than with FFP.”
Claim · model-written summary
SSNM increased plant N accumulation by 13 to 15% versus FFP.
- Taxon
- riceOryza sativat0
- Treatment
- SSNMe1
- Outcome
- plant N, P, and K accumulationse0
- Direction
- increasede0
- Value
- 13 to 15%e0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with the current farmers' fertilizer practice (FFP), average grain yield increased from 5.1 to 6.0 Mg ha −1 , while plant N, P, and K accumulations increased by 13 to 15%”
e1“The gross return above fertilizer cost (GRF) was about 14% greater with SSNM than with FFP.”
Claim · model-written summary
SSNM produced about 14% greater gross return above fertilizer cost than FFP.
- Taxon
- riceOryza sativat0
- Treatment
- SSNMe0
- Outcome
- gross return above fertilizer cost (GRF)e0
- Direction
- greatere0
- Value
- about 14%e0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The gross return above fertilizer cost (GRF) was about 14% greater with SSNM than with FFP.”
Claim · model-written summary
Improved fertilizer N timing or splitting raised N recovery efficiency from 0.20 to 0.30 kg kg −1.
- Taxon
- riceOryza sativat0
- Treatment
- SSNMe0
- Outcome
- N recovery efficiencye0
- Direction
- increasede0
- Value
- 0.20 kg kg −1e0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Improved timing and/or splitting of fertilizer N increased N recovery efficiency from 0.20 kg kg −1 in FFP plots to 0.30 kg kg −1 in SSNM plots.”
Claim · model-written summary
SSNM increased agronomic N use efficiency by 83% versus FFP.
- Taxon
- riceOryza sativat0
- Treatment
- SSNMe0
- Outcome
- agronomic N use efficiencye0
- Direction
- greatere0
- Value
- 83%e0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The agronomic N use efficiency was 83% greater with SSNM than with FFP.”
Claim · model-written summary
The year-wise effect on all parameters was nonsignificant.
- Taxon
- RiceOryza sativat0
- Outcome
- all parameterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The year‐wise effect on all parameters was, however, nonsignificant.”
The same questions in other papers
climate site · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
14 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
12 papers more in this group
See all 16 papers →climate site · nutrient: content · Oryza sativa (rice)Positive and negative results
25 papers in the same direction as this paper · 7 in the opposite direction
- positive
- negative
- negative
29 papers more in this group
See all 33 papers →climate site · yield · Oryza sativa (rice)Positive and negative results
109 papers in the same direction as this paper · 59 in the opposite direction · 3 reporting no difference from an alternative
- positive
- positive
- negative
168 papers more in this group
See all 172 papers →fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
201 papers in the same direction as this paper · 12 in the opposite direction · 6 reporting no difference from an alternative
- positive
- no effect
- no effect
216 papers more in this group
See all 220 papers →fertilization · nutrient: content · Oryza sativa (rice)Positive and negative results
931 papers in the same direction as this paper · 56 in the opposite direction · 5 reporting no difference from an alternative
- negative
- positive
- negative
989 papers more in this group
See all 993 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- positive
- positive
- positive
3,451 papers more in this group
See all 3,455 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.