Abstract
To find out whether the different tillage methods at different planting densities affect the performance of maize hybrids, an experiment was carried out at National Maize Research Program, Rampur during spring season of 2013 and 2014. The experiment was laid out in strip plot design with three replications having 12 treatments. The vertical factor was tillage with conservation tillage (No Tillage + residue=NT) and conventional tillage (CT) and the horizontal factor were genotypes (Rampur Hybrid-2 and RML-32/RML-17) and in split planting geometries (75cm × 25cm =53333 plants/ha, 70cm × 25cm=57142 plant/ha and 60cm ×25cm= 66666 plants/ha). In both the years, the highest number of cobs (73,177 and 67638/ha) was recorded at planting density of 66666/ha. NT had the highest no of kernel rows/cob (14.01) as against 12.12 in CT in 2014. The highest number of kernels (27.3 and 29.29) per row was recorded in NT during 2013 and 2014 respectively. Similarly, in 2014, the highest number of kernels were found in RML-32/RMl-17 (29.17/row) and planting density of 53333/ha (28.46/row). In 2013, RML-32/RML-17 produced the highest test weight of 363.94g over the Rampur hybrid-2 with 362.17g. Significantly the highest grain yield of 9240.00 kg/ha in 2013 and 7459.80 kg/ha in 2014 at planting geometry of 65cm ×25cm were recorded. No effects was found by tillage methods for grain yields of maize in 2013, but was found in 2014 (7012.18 kg in NT compared to 6037.59 kg/ha in CT). NT and wider spaced crop matured earlier in both the years; however Rampur hybrid-2 matured earlier to RML-32/RML-17 in 2013. In 2014, harvest index of 47.85 % was recorded in planting geometry of 66666/ha, the highest benefit cost ratio of 1.36 was worked out in NT and 1.46 at the density of 66666/ha. The highest value of 2.46% of soil organic matter was recorded in NT as compared to 2.43% in CT.Journal of Maize Research and Development (2015) 1(1):10-20DOI: http://dx.doi.org/10.5281/zenodo.34285
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Claims 17
Claim · model-written summary
The density of 66666/ha gave the highest cob counts in both years.
- Taxon
- maize hybridst0
- Treatment
- planting density of 66666/hae0
- Outcome
- number of cobse0
- Direction
- higheste0
- Value
- 73,177 and 67638/hae0
Not reportedComparator
Verbatim
e0“In both the years, the highest number of cobs (73,177 and 67638/ha) was recorded at planting density of 66666/ha.”
t0“maize hybrids”
Claim · model-written summary
No tillage had more kernel rows per cob than conventional tillage in 2014.
Verbatim
e0“NT had the highest no of kernel rows/cob (14.01) as against 12.12 in CT in 2014.”
t0“maize hybrids”
Claim · model-written summary
No tillage produced the highest kernels per row in 2013.
- Taxon
- maize hybridst0
- Treatment
- NTe0
- Outcome
- number of kernelse0
- Direction
- higheste0
- Value
- 27.3e0
- Qualifier
- 2013e0
Not reportedComparator
Verbatim
e0“The highest number of kernels (27.3 and 29.29) per row was recorded in NT during 2013 and 2014 respectively.”
t0“maize hybrids”
Claim · model-written summary
No tillage produced the highest kernels per row in 2014.
- Taxon
- maize hybridst0
- Treatment
- NTe0
- Outcome
- number of kernelse0
- Direction
- higheste0
- Value
- 29.29e0
- Qualifier
- 2014e0
Not reportedComparator
Verbatim
e0“The highest number of kernels (27.3 and 29.29) per row was recorded in NT during 2013 and 2014 respectively.”
t0“maize hybrids”
Claim · model-written summary
RML-32/RMl-17 had the highest kernels per row in 2014.
Verbatim
e0“in 2014, the highest number of kernels were found in RML-32/RMl-17 (29.17/row)”
Claim · model-written summary
A planting density of 53333/ha had the highest kernels per row in 2014.
- Taxon
- maize hybridst0
- Treatment
- planting density of 53333/hae0
- Outcome
- number of kernelse1
- Direction
- higheste1
- Value
- 28.46/rowe0
Not reportedComparator
Verbatim
e0“planting density of 53333/ha (28.46/row)”
e1“in 2014, the highest number of kernels were found in RML-32/RMl-17 (29.17/row) and planting density of 53333/ha (28.46/row).”
t0“maize hybrids”
Claim · model-written summary
RML-32/RML-17 had the highest test weight in 2013.
Verbatim
e0“In 2013, RML-32/RML-17 produced the highest test weight of 363.94g over the Rampur hybrid-2 with 362.17g.”
Claim · model-written summary
Grain yield at the reported 65cm ×25cm geometry was 9240.00 kg/ha in 2013.
- Taxon
- maize hybridst0
- Treatment
- planting geometry of 65cm ×25cme0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 9240.00 kg/hae0
Not reportedComparator
Verbatim
e0“Significantly the highest grain yield of 9240.00 kg/ha in 2013 and 7459.80 kg/ha in 2014 at planting geometry of 65cm ×25cm were recorded.”
t0“maize hybrids”
Claim · model-written summary
Grain yield at the reported 65cm ×25cm geometry was 7459.80 kg/ha in 2014.
- Taxon
- maize hybridst0
- Treatment
- planting geometry of 65cm ×25cme0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 7459.80 kg/hae0
Not reportedComparator
Verbatim
e0“Significantly the highest grain yield of 9240.00 kg/ha in 2013 and 7459.80 kg/ha in 2014 at planting geometry of 65cm ×25cm were recorded.”
t0“maize hybrids”
Claim · model-written summary
Tillage methods showed no grain-yield effect in 2013.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No effects was found by tillage methods for grain yields of maize in 2013”
t0“maize hybrids”
Claim · model-written summary
No tillage had higher grain yield than conventional tillage in 2014.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but was found in 2014 (7012.18 kg in NT compared to 6037.59 kg/ha in CT).”
e1“No effects was found by tillage methods for grain yields of maize in 2013, but was found in 2014 (7012.18 kg in NT compared to 6037.59 kg/ha in CT).”
Claim · model-written summary
No tillage and wider spacing led to earlier maturity in both years.
Not reportedComparator
Verbatim
e0“NT and wider spaced crop matured earlier in both the years”
t0“maize hybrids”
Claim · model-written summary
Rampur hybrid-2 matured earlier than RML-32/RML-17 in 2013.
Verbatim
e0“Rampur hybrid-2 matured earlier to RML-32/RML-17 in 2013.”
Claim · model-written summary
The 66666/ha planting geometry had a harvest index of 47.85 % in 2014.
Not reportedComparatorDirection
Verbatim
e0“In 2014, harvest index of 47.85 % was recorded in planting geometry of 66666/ha”
t0“maize hybrids”
Claim · model-written summary
No tillage had the highest benefit cost ratio, 1.36.
Not reportedComparator
Verbatim
e0“the highest benefit cost ratio of 1.36 was worked out in NT”
t0“maize hybrids”
Claim · model-written summary
The 66666/ha density had a benefit cost ratio of 1.46.
- Taxon
- maize hybridst0
- Treatment
- density of 66666/hae0
- Outcome
- benefit cost ratioe0
- Direction
- higheste0
- Value
- 1.46e0
Not reportedComparator
Verbatim
e0“the highest benefit cost ratio of 1.36 was worked out in NT and 1.46 at the density of 66666/ha”
t0“maize hybrids”
Claim · model-written summary
No tillage had higher soil organic matter than conventional tillage.
Verbatim
e0“The highest value of 2.46% of soil organic matter was recorded in NT as compared to 2.43% in CT.”
t0“maize hybrids”
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