Abstract
No‐till management systems have been reported to reduce nonpoint source (NPS) pollution from agricultural fields. However, questions have been raised concerning the fate of nitrogen (N) in these systems. Increased moisture conservation and reduced runoff from no‐till systems have the potential to accelerate leaching of nitrate (NO3 ‐) out of the root zone, thus altering the problem from one of surface water degradation to one of ground water pollution. However, it is also probable that the additional moisture conserved in no‐till systems result in increased crop yield and N uptake. Time of N application and source of N could influence yield and N recovery and thus limit N losses during critical periods. A 3‐year study was conducted to determine if the fate of N applied to nonirrigated corn (Zea mays L.) would be influenced by tillage system, N rate, and time and source of N application. This paper addresses the impact of these practices on yield and N uptake. The experimental site was located on a Typic Hapludult that is characteristic of finer‐textured soils used for continuous corn production. Management practices evaluated were conventional‐till vs. no‐till, rate of N application, inorganic N vs. sewage sludge N, and preplant vs. split application of N. Yield and N recovery were, respectively, 19 and 22% higher in no‐till compared with conventional‐till systems at the point of maximum yield. Corn yield and N uptake were both increased when sewage sludge was applied compared with either split or preplant application of inorganic N. No differences were observed in corn yield and N uptake between preplant and split application of N. These studies were conducted during years with drier than normal growing seasons, and the results indicate that the higher moisture present in the no‐till system may have contributed to increased yield and N recovery. The increased N recovery reduces the quantity of N remaining in the soil profile that might be lost, due to leaching, after crop harvest.
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Claims 5
Claim · model-written summary
No-till increased corn yield by 19 compared with conventional-till
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- no‐tille0
- Outcome
- Yielde0
- Direction
- highere0
- Value
- 19e0
- Comparator
- conventional‐till systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn yield and nitrogen uptake as influenced by tillage and applied nitrogen”
e0“Yield and N recovery were, respectively, 19 and 22% higher in no‐till compared with conventional‐till systems at the point of maximum yield”
Claim · model-written summary
No-till increased corn N recovery by 22% compared with conventional-till
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- no‐tille0
- Outcome
- N recoverye0
- Direction
- highere0
- Value
- 22%e0
- Comparator
- conventional‐till systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn yield and nitrogen uptake as influenced by tillage and applied nitrogen”
e0“Yield and N recovery were, respectively, 19 and 22% higher in no‐till compared with conventional‐till systems at the point of maximum yield”
Claim · model-written summary
Sewage sludge N increased corn yield and N uptake compared with split or preplant inorganic N
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- sewage sludgee1
- Outcome
- Corn yield and N uptakee1
- Direction
- increasede1
- Comparator
- split or preplant application of inorganic Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn yield and nitrogen uptake as influenced by tillage and applied nitrogen”
e1“Corn yield and N uptake were both increased when sewage sludge was applied compared with either split or preplant application of inorganic N”
Claim · model-written summary
Preplant and split application of N gave no difference in corn yield or N uptake
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- preplante2
- Outcome
- corn yield and N uptakee2
- Direction
- no_changeinferrede2
- Comparator
- split application of Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn yield and nitrogen uptake as influenced by tillage and applied nitrogen”
e2“No differences were observed in corn yield and N uptake between preplant and split application of N”
Claim · model-written summary
Higher moisture in the no-till system may have contributed to increased corn yield and N recovery
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- increased yield and N recoverye3
- Qualifier
- the higher moisture present in the no‐till systeme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn yield and nitrogen uptake as influenced by tillage and applied nitrogen”
e3“the higher moisture present in the no‐till system may have contributed to increased yield and N recovery”
The same questions in other papers
organic · yield · Zea mays (maize)Positive and negative results
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- positive
- no effect
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See all 373 papers →tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- positive
- positive
- positive
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See all 1,099 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.