Abstract
A field experiment was conducted at the National Maize Research Program (NMRP), Chitwan, Nepal during summer of 2014 to evaluate the response of tillage methods (conventional and zero tillage) and nitrogen levels (0, 60, 120 and 180 kg ha-1) on grain yield of two maize (Zea mays L.) hybrids (Rampur hybrid-2 and RML32/RML17). The experiment was laid out in strip-split plot design consisting of sixteen treatments with three replications. Growth and yield parameters of maize were measured and economic analysis was conducted during plant growth and after harvest. The maize hybrids, Rampur hybrid-2 and RML32/RML17, and tillage methods, zero tillage and conventional tillage, had similar grain yield (2.9 t ha-1). The grain yield obtained from control without nitrogen application (1.64 t ha-1) was significantly lower than that of all levels (60, 120 and 180 kg ha-1) of nitrogen. The grain yield (3.57 t ha-1) obtained with 180 kg N ha-1 was significantly higher than 60 kg N ha-1 (3.05 t ha-1) but was at par with 120 kg N ha-1 (3.44 t ha-1). The difference between 120 and 60 kg N ha-1 application with respect to grain yield was non-significant. Grain yield increased non-linearly with increasing levels of N application, while the physical and economical maximum doses of nitrogen equaled to 172.38 and 153.77 for zero tillage, and 140.00 and 127.86 kg ha-1 for conventional tillage methods, respectively. Results highlight the potential use of zero tillage with 120 kg ha-1 nitrogen level in hybrid varieties to harness agronomic and economic benefits in the inner Terai region of Nepal during summer season. Key words: Maize hybrids, tillage, nitrogen, yield.
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Claims 12
Claim · model-written summary
The two maize hybrids had similar grain yield of 2.9 t ha-1.
- Treatment
- Rampur hybrid-2e0
- Outcome
- grain yielde0
- Direction
- similare0
- Value
- 2.9 t ha-1e0
- Comparator
- RML32/RML17e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maize hybrids, Rampur hybrid-2 and RML32/RML17, and tillage methods, zero tillage and conventional tillage, had similar grain yield (2.9 t ha-1).”
t0“maize hybrids”
Claim · model-written summary
Zero and conventional tillage had similar maize grain yield of 2.9 t ha-1.
- Treatment
- zero tillagee0
- Outcome
- grain yielde0
- Direction
- similare0
- Value
- 2.9 t ha-1e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maize hybrids, Rampur hybrid-2 and RML32/RML17, and tillage methods, zero tillage and conventional tillage, had similar grain yield (2.9 t ha-1).”
t0“maize hybrids”
Claim · model-written summary
Control maize without nitrogen yielded 1.64 t ha-1, significantly less than all nitrogen treatments.
- Treatment
- 60, 120 and 180 kg ha-1e0
- Outcome
- grain yielde0
- Direction
- lowere0
- Value
- 1.64 t ha-1e0
- Comparator
- control without nitrogen applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield obtained from control without nitrogen application (1.64 t ha-1) was significantly lower than that of all levels (60, 120 and 180 kg ha-1) of nitrogen.”
t0“maize hybrids”
Claim · model-written summary
At 180 kg N ha-1, maize yielded 3.57 t ha-1, significantly more than at 60 kg N ha-1.
- Treatment
- 180 kg N ha-1e0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 3.57 t ha-1e0
- Qualifier
- 3.05 t ha-1e0
- Comparator
- 60 kg N ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield (3.57 t ha-1) obtained with 180 kg N ha-1 was significantly higher than 60 kg N ha-1 (3.05 t ha-1)”
t0“maize hybrids”
Claim · model-written summary
Yield at 180 kg N ha-1 was statistically at par with yield at 120 kg N ha-1.
- Treatment
- 180 kg N ha-1e0
- Outcome
- grain yielde0
- Direction
- at pare0
- Value
- 3.44 t ha-1e0
- Comparator
- 120 kg N ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield (3.57 t ha-1) obtained with 180 kg N ha-1 was significantly higher than 60 kg N ha-1 (3.05 t ha-1) but was at par with 120 kg N ha-1 (3.44 t ha-1).”
t0“maize hybrids”
Claim · model-written summary
Maize yield difference between 120 and 60 kg N ha-1 was not significant.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The difference between 120 and 60 kg N ha-1 application with respect to grain yield was non-significant.”
t0“maize hybrids”
Claim · model-written summary
Maize grain yield increased nonlinearly with increasing nitrogen application.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield increased non-linearly with increasing levels of N application”
t0“maize hybrids”
Claim · model-written summary
The physical maximum nitrogen dose under zero tillage was 172.38 kg ha-1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physical and economical maximum doses of nitrogen equaled to 172.38 and 153.77 for zero tillage”
t0“maize hybrids”
Claim · model-written summary
The economic maximum nitrogen dose under zero tillage was 153.77 kg ha-1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physical and economical maximum doses of nitrogen equaled to 172.38 and 153.77 for zero tillage”
t0“maize hybrids”
Claim · model-written summary
The physical maximum nitrogen dose under conventional tillage was 140.00 kg ha-1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physical and economical maximum doses of nitrogen equaled to 172.38 and 153.77 for zero tillage, and 140.00 and 127.86 kg ha-1 for conventional tillage methods”
t0“maize hybrids”
Claim · model-written summary
The economic maximum nitrogen dose under conventional tillage was 127.86 kg ha-1.
- Treatment
- conventional tillage methodse0
- Outcome
- economical maximum doses of nitrogene0
- Value
- 127.86 kg ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physical and economical maximum doses of nitrogen equaled to 172.38 and 153.77 for zero tillage, and 140.00 and 127.86 kg ha-1 for conventional tillage methods”
t0“maize hybrids”
Claim · model-written summary
The authors recommend zero tillage with 120 kg ha-1 nitrogen to obtain agronomic and economic benefits for hybrids in inner Terai during summer.
- Outcome
- potential use of zero tillage with 120 kg ha-1 nitrogen levele0
- Qualifier
- during summer seasone0
- Setting
- inner Terai region of Nepale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results highlight the potential use of zero tillage with 120 kg ha-1 nitrogen level in hybrid varieties to harness agronomic and economic benefits in the inner Terai region of Nepal during summer season.”
t0“maize hybrids”
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See all 2,185 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.