Abstract
Two field experiments were conducted during the 1993 and 1994 growing seasons at Samaru (7° 38' E; 11° 11' N), northern Nigeria, to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes planted early in the season under five levels of N. The hybrid (8644-27) gave the highest grain yield and was the most N-use efficient genotype. It had a longer grain filling period, a higher harvest index, and a greater 1000-kerneI weight than other genotypes. The most widely grown open pollinated variety (TZB-SR) was the least efficient in utilizing available soil N for grain production, although it had the highest number of kernels per ear and total above-ground dry matter. The semiprolific (SPL) and EV8728-SR genotypes appeared to have a higher potential to adapt to nitrogen stress than other genotypes. They had higher grain yields under zero-N in both years, but the differences were not significant. They also showed greater synchronization of anthesis and silking, which indicates better ability to tolerate nitrogen stress. Traits such as extended grain filling and 1000-kernel weight should be further investigated for inclusion in a breeding scheme to increase maize yield. Early planting to capture the N flush, and application of a suboptimal amount of N (60 kg/ha at 2 WAP) was adequate for production of all the genotypes under the loamy soil conditions of the chosen site. A combination of legume rotation, 60 kg N/ha, and an N-use efficient genotype (8644-27) gave a yield advantage of 1.3 t/ha over a monocrop maize supplied with 60 kg N/ha on farmers' fields in the moist savanna of Nigeria.
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 13
Claim · model-written summary
Hybrid 8644-27 gave the highest grain yield of the maize genotypes.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e1“The hybrid (8644-27) gave the highest grain yield and was the most N-use efficient genotype”
Claim · model-written summary
Hybrid 8644-27 was the most N-use efficient maize genotype.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e1“The hybrid (8644-27) gave the highest grain yield and was the most N-use efficient genotype”
Claim · model-written summary
The open pollinated variety TZB-SR was the least efficient in utilizing available soil N for grain production.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e3“The most widely grown open pollinated variety (TZB-SR) was the least efficient in utilizing available soil N for grain production”
Claim · model-written summary
TZB-SR had the highest number of kernels per ear.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e3“The most widely grown open pollinated variety (TZB-SR) was the least efficient in utilizing available soil N for grain production”
e4“although it had the highest number of kernels per ear and total above-ground dry matter”
Claim · model-written summary
TZB-SR had the highest total above-ground dry matter.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e3“The most widely grown open pollinated variety (TZB-SR) was the least efficient in utilizing available soil N for grain production”
e4“although it had the highest number of kernels per ear and total above-ground dry matter”
Claim · model-written summary
The SPL genotype appeared to have a higher potential to adapt to nitrogen stress than other genotypes.
- Material
- SPLe5
- Outcome
- potential to adapt to nitrogen stresse5
- Qualifier
- higher potentiale5
- Comparator
- other genotypese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e5“The semiprolific (SPL) and EV8728-SR genotypes appeared to have a higher potential to adapt to nitrogen stress than other genotypes”
Claim · model-written summary
The EV8728-SR genotype appeared to have a higher potential to adapt to nitrogen stress than other genotypes.
- Material
- EV8728-SRe5
- Outcome
- potential to adapt to nitrogen stresse5
- Qualifier
- higher potentiale5
- Comparator
- other genotypese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e5“The semiprolific (SPL) and EV8728-SR genotypes appeared to have a higher potential to adapt to nitrogen stress than other genotypes”
Claim · model-written summary
The SPL genotype had higher grain yields under zero N, though the differences were not significant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e5“The semiprolific (SPL) and EV8728-SR genotypes appeared to have a higher potential to adapt to nitrogen stress than other genotypes”
e6“They had higher grain yields under zero-N in both years, but the differences were not significant”
Claim · model-written summary
The EV8728-SR genotype had higher grain yields under zero N, though the differences were not significant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e5“The semiprolific (SPL) and EV8728-SR genotypes appeared to have a higher potential to adapt to nitrogen stress than other genotypes”
e6“They had higher grain yields under zero-N in both years, but the differences were not significant”
Claim · model-written summary
The semiprolific and EV8728-SR genotypes showed greater synchronization of anthesis and silking, indicating better tolerance of nitrogen stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e7“They also showed greater synchronization of anthesis and silking, which indicates better ability to tolerate nitrogen stress”
Claim · model-written summary
Extended grain filling and 1000-kernel weight should be further investigated for inclusion in a maize breeding scheme to increase yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e1“Traits such as extended grain filling and 1000-kernel weight should be further investigated for inclusion in a breeding scheme to increase maize yield”
Claim · model-written summary
Application of 60 kg N/ha at 2 WAP with early planting was adequate for production of all maize genotypes on loamy soil.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e1“Early planting to capture the N flush, and application of a suboptimal amount of N (60 kg/ha at 2 WAP) was adequate for production of all the genotypes under the loamy soil conditions of the chosen site”
Claim · model-written summary
A combination of legume rotation, 60 kg N/ha and genotype 8644-27 gave a 1.3 t/ha yield advantage over monocrop maize on farmers' fields.
- Treatment
- A combination of legume rotation, 60 kg N/ha, and an N-use efficient genotype (8644-27)e1
- Outcome
- yield advantagee1
- Direction
- increaseinferrede1
- Value
- 1.3 t/hae1
- Comparator
- a monocrop maize supplied with 60 kg N/hae1
- Setting
- farmers' fieldse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to evaluate N-use efficiency (kg grain per kg available soil N) and yield of 5 maize genotypes”
e1“A combination of legume rotation, 60 kg N/ha, and an N-use efficient genotype (8644-27) gave a yield advantage of 1.3 t/ha over a monocrop maize supplied with 60 kg N/ha on farmers' fields”
The same questions in other papers
rotation · yield · Zea mays (maize)Positive and negative results
253 papers in the same direction as this paper · 52 in the opposite direction · 16 reporting no difference from an alternative
- negative
- negative
- negative
318 papers more in this group
See all 322 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
- positive
- positive
- positive
2,181 papers more in this group
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.