Abstract
Nitrogen fertilization is the most critical agronomic input affecting barley production and farm profitability. The strict quality requirements for malting barley are challenging to achieve for farmers. In addition, soil variability and weather conditions can affect barley yield and quality. Thus, the objectives of this study are to (a) quantify the variability of soil properties, and (b) use spatial data in a crop simulation model, quantifying the impacts of climate−soil interactions on the barley crop yield and grain quality. Based on historical yield maps, a commercial field was divided into different yield stability zone levels. The Decision Support System for Agrotechnology Transfer model was used to evaluate soil and crop spatial data. The bulk density affected the soil water content and soil mineral N and hence the crop-growing conditions in each yield stability zone. Our observed and simulated results showed that 120 kg N ha−1 is the optimal rate to increase grain yield while still keeping within the grain N% requirements for malting quality. This study shows the great value of integrating crop modeling with on−farm experimental data for improving understanding of the factors which affect site−specific N fertilization of barley.
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Claims 3
Claim · model-written summary
Bulk density affected soil water and mineral nitrogen across yield stability zones.
- Taxon
- Barley
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Hordeum vulgaret0 - Outcome
- soil water content and soil mineral Ne0
- Setting
- each yield stability zonee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The bulk density affected the soil water content and soil mineral N and hence the crop-growing conditions in each yield stability zone”
t0“Spring Barley”
Claim · model-written summary
A rate of 120 kg N ha−1 was optimal for increasing barley grain yield while meeting malting grain nitrogen requirements.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- 120 kg N ha−1e0
- Outcome
- grain yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N ha−1 is the optimal rate to increase grain yield while still keeping within the grain N% requirements for malting quality”
t0“Spring Barley”
Claim · model-written summary
A rate of 120 kg N ha−1 kept barley grain nitrogen within malting quality requirements.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- 120 kg N ha−1e0
- Outcome
- grain N%e0
- Direction
- keeping withine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N ha−1 is the optimal rate to increase grain yield while still keeping within the grain N% requirements for malting quality”
t0“Spring Barley”
The same questions in other papers
nitrogen · yield · Hordeum vulgare (barley)Positive and negative results
251 papers in the same direction as this paper · 44 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- no effect
295 papers more in this group
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