Abstract
To help farmers in the mid hills of Nepal improve their crop management and rice yields, we conducted a study testing different nursery management options and their effect on grain yield and yield components under rainfed conditions. The experiment was conducted in a farmer’s field during the cropping season 2009 and 2010 at Sundarbazar, Lamjung, Nepal, using a 3-factor factorial RCB design with 3 replications. The three management factors tested were 1) fertilizer management in the nursery, 2) seeding density, and 3) seedling age at transplanting, using the rainfed lowland rice variety Radha-4. There were eight treatment combinations, consisting of two levels of fertilization (0 and 20:20:0:13 kg NPKS ha-1 at 15 DAS), two levels of seeding density (607 and 303 g·m-2) and two seedling ages (20 and 40 days old). Two years’ results showed that top-dressed fertilizer in the nursery had no consistent effect on grain yield. However, lower seeding density (303 g·m-2) resulted in taller plants, more productive tillers m-2, less sterility and higher grain yield. In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield. The interaction analysis between both factors indicated that 40 days old seedling with a low seeding density produced the highest grain yield, both in the drought season 2009 and the high-yielding season 2010. The economic analysis confirmed that the treatment with low seeding density and 40 days old seedlings produced by far the highest net returns and B:C ratio in both seasons, independent of the fertilizer treatment. The combination of these two management components is therefore economically viable and profitable, and can be recommended to farmers. However, the results need to be confirmed for other varieties used by farmers in the region.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 14
Claim · model-written summary
Nursery top-dressed fertilizer had no consistent effect on rice grain yield.
- Taxon
- Rice
Oryza sativat0 - Treatment
- top-dressed fertilizer in the nurserye0
- Outcome
- grain yielde0
- Direction
- no consistent effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two years’ results showed that top-dressed fertilizer in the nursery had no consistent effect on grain yield.”
t0“Rice”
Claim · model-written summary
Lower seeding density produced taller plants in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- lower seeding density (303 g·m-2)e0
- Outcome
- taller plantse0
- Direction
- tallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, lower seeding density (303 g·m-2) resulted in taller plants, more productive tillers m-2, less sterility and higher grain yield.”
t0“Rice”
Claim · model-written summary
Lower seeding density produced more productive tillers m-2 in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- lower seeding density (303 g·m-2)e0
- Outcome
- more productive tillers m-2e0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, lower seeding density (303 g·m-2) resulted in taller plants, more productive tillers m-2, less sterility and higher grain yield.”
t0“Rice”
Claim · model-written summary
Lower seeding density produced less sterility in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- lower seeding density (303 g·m-2)e0
- Outcome
- less sterilitye0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, lower seeding density (303 g·m-2) resulted in taller plants, more productive tillers m-2, less sterility and higher grain yield.”
t0“Rice”
Claim · model-written summary
Lower seeding density produced higher grain yield in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- lower seeding density (303 g·m-2)e0
- Outcome
- higher grain yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, lower seeding density (303 g·m-2) resulted in taller plants, more productive tillers m-2, less sterility and higher grain yield.”
t0“Rice”
Claim · model-written summary
Older seedlings produced taller plants in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- older seedlings (40 days)e0
- Outcome
- taller plantse0
- Direction
- tallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield.”
t0“Rice”
Claim · model-written summary
Older seedlings produced more productive tillers in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- older seedlings (40 days)e0
- Outcome
- more productive tillerse0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield.”
t0“Rice”
Claim · model-written summary
Older seedlings produced more filled grains in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- older seedlings (40 days)e0
- Outcome
- more filled grainse0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield.”
t0“Rice”
Claim · model-written summary
Older seedlings produced higher grain yield in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- older seedlings (40 days)e0
- Outcome
- grain and straw yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield.”
t0“Rice”
Claim · model-written summary
Older seedlings produced higher straw yield in rice.
- Taxon
- RiceOryza sativat0
- Treatment
- older seedlings (40 days)e0
- Outcome
- grain and straw yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In addition, older seedlings (40 days) produced taller plants, more productive tillers, more filled grains, and a higher grain and straw yield.”
t0“Rice”
Claim · model-written summary
Forty-day-old seedlings at low seeding density gave the highest rice grain yield in both seasons.
- Taxon
- RiceOryza sativat0
- Treatment
- 40 days old seedling with a low seeding densitye0
- Outcome
- grain yielde0
- Direction
- higheste0
- Qualifier
- both in the drought season 2009 and the high-yielding season 2010e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40 days old seedling with a low seeding density produced the highest grain yield, both in the drought season 2009 and the high-yielding season 2010.”
t0“Rice”
Claim · model-written summary
Low seeding density with 40-day-old seedlings produced the highest net returns in both seasons.
- Taxon
- RiceOryza sativat0
- Treatment
- low seeding density and 40 days old seedlingse0
- Outcome
- net returnse0
- Direction
- higheste0
- Qualifier
- in both seasons, independent of the fertilizer treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment with low seeding density and 40 days old seedlings produced by far the highest net returns and B:C ratio in both seasons, independent of the fertilizer treatment.”
t0“Rice”
Claim · model-written summary
Low seeding density with 40-day-old seedlings produced the highest B:C ratio in both seasons.
- Taxon
- RiceOryza sativat0
- Treatment
- low seeding density and 40 days old seedlingse0
- Outcome
- B:C ratioe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment with low seeding density and 40 days old seedlings produced by far the highest net returns and B:C ratio in both seasons, independent of the fertilizer treatment.”
t0“Rice”
Claim · model-written summary
The authors recommend combining low seeding density and 40-day-old seedlings for farmers, subject to confirmation in other varieties.
- Taxon
- RiceOryza sativat0
- Outcome
- can be recommended to farmerse0
- Qualifier
- results need to be confirmed for other varieties used by farmers in the regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of these two management components is therefore economically viable and profitable, and can be recommended to farmers. However, the results need to be confirmed for other varieties used by farmers in the region.”
t0“Rice”
The same questions in other papers
density · yield · Oryza sativa (rice)Positive and negative results
329 papers in the same direction as this paper · 58 in the opposite direction · 7 reporting no difference from an alternative
- positive
- positive
- positive
391 papers more in this group
See all 395 papers →transplanting · yield · Oryza sativa (rice)Positive and negative results
155 papers in the same direction as this paper · 922 in the opposite direction
- positive
- positive
- positive
1,074 papers more in this group
See all 1,078 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
271 papers in the same direction as this paper · 3,183 in the opposite direction
- 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.