Abstract
Abstract Nitrogen (N) use efficiency on claypan soils is often low; therefore, adopting effective management practices is crucial for increasing corn ( Zea mays L.) productivity and maximizing economic returns. The objective of this 4‐year field study (2019–2022) was to evaluate the impact of anhydrous ammonia (AA) with or without a nitrification inhibitor (nitrapyrin) on corn productivity, grain quality, partial factor productivity (PFP), and economic returns across different topographic positions (shoulder, backslope, and footslope) within a landscape. Averaged over the years, AA + nitrapyrin treatment had over 6.4% yield advantage compared to AA alone. Grain N removal was 11 kg ha −1 higher and PFP was 3.6 units higher with AA + nitrapyrin compared to AA treatment. Although the expected net returns with nitrapyrin were lower at the footslope and higher at the shoulder position, the incremental yields, economic yield difference, and net economic gains at the footslope were consistently greater than those at the backslope and shoulder. Averaged over site‐years, the footslope position generated higher net economic gains ($200.07 ha −1 ), which were $46.04 and $125.37 ha −1 higher than the backslope and shoulder positions, respectively. These findings emphasize the importance of site‐specific N management with nitrapyrin for optimizing yields, enhancing nutrient use efficiency, and maximizing economic returns under varying landscapes.
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Claims 7
Claim · model-written summary
AA plus nitrapyrin increased corn yield by more than 6.4% compared with AA alone.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“AA + nitrapyrin treatment had over 6.4% yield advantage compared to AA alone”
Claim · model-written summary
AA plus nitrapyrin increased grain N removal by 11 kg ha −1 compared with AA.
- Treatment
- AA + nitrapyrine1
- Outcome
- Grain N removale1
- Direction
- highere1
- Value
- 11 kg ha −1e1
- Comparator
- AA treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“Grain N removal was 11 kg ha −1 higher and PFP was 3.6 units higher with AA + nitrapyrin compared to AA treatment”
Claim · model-written summary
AA plus nitrapyrin increased PFP by 3.6 units compared with AA.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“Grain N removal was 11 kg ha −1 higher and PFP was 3.6 units higher with AA + nitrapyrin compared to AA treatment”
Claim · model-written summary
Expected net returns with nitrapyrin were lower at the footslope and higher at the shoulder.
- Treatment
- nitrapyrine1
- Outcome
- expected net returnse1
- Direction
- lowere1
- Qualifier
- higher at the shoulder positione1
- Setting
- footslopee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“expected net returns with nitrapyrin were lower at the footslope and higher at the shoulder position”
Claim · model-written summary
Incremental yields, economic yield difference and net economic gains at the footslope exceeded those at backslope and shoulder positions.
- Outcome
- incremental yields, economic yield difference, and net economic gainse1
- Direction
- greatere1
- Comparator
- backslope and shouldere1
- Setting
- footslopee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“the incremental yields, economic yield difference, and net economic gains at the footslope were consistently greater than those at the backslope and shoulder”
Claim · model-written summary
Footslope net economic gains averaged $200.07 ha −1, exceeding backslope by $46.04 and shoulder by $125.37 ha −1.
- Outcome
- net economic gainse1
- Direction
- highere1
- Value
- $200.07 ha −1e1
- Qualifier
- $46.04 and $125.37 ha −1e1
- Comparator
- backslope and shoulder positionse1
- Setting
- footslope positione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“the footslope position generated higher net economic gains ($200.07 ha −1 ), which were $46.04 and $125.37 ha −1 higher than the backslope and shoulder positions, respectively”
Claim · model-written summary
The authors recommend site-specific nitrogen management with nitrapyrin to optimize yields, nutrient efficiency and returns.
- Treatment
- site‐specific N management with nitrapyrine1
- Outcome
- optimizing yields, enhancing nutrient use efficiency, and maximizing economic returnse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“importance of site‐specific N management with nitrapyrin for optimizing yields, enhancing nutrient use efficiency, and maximizing economic returns under varying landscapes”
The same questions in other papers
nitrapyrin · yield · Zea mays (maize)Results differ
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- positive
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See all 43 papers →ammonia · yield · Zea mays (maize)Positive and negative results
16 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
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See all 23 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.