Abstract
The effects of pelleted urea, an aqueous urea solution, ammonium sulphate, a lime/ammonium nitrate mix and potassium nitrate on grain yield in winter-sown 'Rongotea' wheat were assessed in 13 field experiments conducted in three cropping seasons. The nitrogen fertilisers were applied in early spring to the tillering wheat at rates which supplied 35, 70, 105 and 140 kg N/ha. Grain yield responses to applied nitrogen were markedly affected by spring-summer rainfall and varied widely among cropping years and sites. Differences among nitrogen fertilisers were generally small and not significant, apart from an inferiority of the urea solution. Additional Keywords: urea, ammonium sulphate, ammonium nitrate, potassium nitrate, spring-summer rairifa/1, 'plant-available' nitrogen, shallow and deep soils.
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Claims 3
Claim · model-written summary
Wheat grain yield responses to applied nitrogen varied widely among years and sites and were strongly affected by spring-summer rainfall.
- Taxon
- WHEAT
Triticum aestivumt0 - Treatment
- applied nitrogene0
- Outcome
- Grain yield responsese0
- Qualifier
- spring-summer rainfalle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield responses to applied nitrogen were markedly affected by spring-summer rainfall and varied widely among cropping years and sites”
t0“WHEAT”
Claim · model-written summary
Grain yield differences among nitrogen fertilizers in wheat were generally small and not significant.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- nitrogen fertiliserse0
- Outcome
- Differencese0
- Direction
- smalle0
- Comparator
- nitrogen fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences among nitrogen fertilisers were generally small and not significant”
t0“WHEAT”
Claim · model-written summary
Urea solution yielded worse than the other nitrogen fertilizers in wheat.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- urea solutione0
- Outcome
- grain yielde1
- Direction
- inferioritye0
- Comparator
- nitrogen fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences among nitrogen fertilisers were generally small and not significant, apart from an inferiority of the urea solution”
e1“grain yield in winter-sown”
t0“WHEAT”
The same questions in other papers
nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
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