Abstract
A 3-year study of the effects of different tillage practices (comprising two no-tillage systems, five reduced-tillage systems, and a conventional tillage system) and two N and P fertilizer rates on maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil. The N rates were 99 and 33 kg N/ha for maize and 49.5 and 16.5 kg N/ha for cotton. The rates of P were 27 and 9 kg P/ha (maize) and 13 and 4.5 kg P/ha (cotton). Maize grain and cotton lint yields were significantly (P ≤ 0.05) influenced by tillage practice and fertilizer rate. However, maize yields over the 3 yr under CT nd NT did not differ significantly, while cotton yields under the two tillage treatments were significantly different at the high fertilizer rate only. Except for maize yields under MT and DR, and cotton yields under DI, maize and cotton yields under CT and the reduced tillage systems did not differ significantly. This suggests that the additional cost of deep-plowing under conventional tillage could be saved without sacrificing yields, particularly for cotton. Crop yields under NT were higher (P ≤ 0.05) than under ZT (no-tillage that was previously under conventional tillage), and increasing the fertilizer application rate failed to improve yields under ZT to yields at low level under NT. Nutrient distribution was significantly influenced by tillage practice in the 0–5 cm depth but not in the lower depths. However, the level of fertilization did not influence nutrient distribution in any soil depth, except for organic C content in the 0–5 cm and available P content in the 5–20 cm depth.
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Claims 8
Claim · model-written summary
Maize yields over three years under conventional tillage and no-tillage did not differ significantly.
- Material
- TZBe1
- Treatment
- NTe2
- Outcome
- maize yieldse2
- Direction
- no_changeinferrede2
- Comparator
- CTe2
- Setting
- tropical ferruginous soile1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e2“maize yields over the 3 yr under CT nd NT did not differ significantly”
Claim · model-written summary
Cotton yields under the two tillage treatments were significantly different at the high fertilizer rate only.
- Taxon
- cotton
Gossypium hirsutume4 - Treatment
- tillage treatmentse4
- Outcome
- cotton yieldse4
- Qualifier
- at the high fertilizer rate onlye4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“cotton yields under the two tillage treatments were significantly different at the high fertilizer rate only”
Claim · model-written summary
Maize grain yield was significantly influenced by tillage practice and fertilizer rate (P ≤ 0.05).
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e3“Maize grain and cotton lint yields were significantly (P ≤ 0.05) influenced by tillage practice and fertilizer rate”
Claim · model-written summary
Cotton lint yield was significantly influenced by tillage practice and fertilizer rate (P ≤ 0.05).
- Taxon
- cottonGossypium hirsutume1
- Treatment
- tillage practice and fertilizer ratee3
- Outcome
- cotton lint yieldse3
- Qualifier
- P ≤ 0.05e3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e3“Maize grain and cotton lint yields were significantly (P ≤ 0.05) influenced by tillage practice and fertilizer rate”
Claim · model-written summary
Crop yields under no-tillage were higher than under zero-tillage (P ≤ 0.05).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e5“Crop yields under NT were higher (P ≤ 0.05) than under ZT”
Claim · model-written summary
Increasing the fertilizer application rate failed to raise yields under zero-tillage to the low-level yields under no-tillage.
- Treatment
- increasing the fertilizer application ratee6
- Outcome
- yields under ZTe6
- Direction
- failed to improvee6
- Comparator
- yields at low level under NTe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e6“increasing the fertilizer application rate failed to improve yields under ZT to yields at low level under NT”
Claim · model-written summary
Nutrient distribution was significantly influenced by tillage practice in the 0–5 cm soil depth but not in lower depths.
- Treatment
- tillage practicee7
- Outcome
- Nutrient distributione7
- Qualifier
- in the 0–5 cm depth but not in the lower depthse7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e7“Nutrient distribution was significantly influenced by tillage practice in the 0–5 cm depth but not in the lower depths”
Claim · model-written summary
Fertilization level did not influence nutrient distribution in any soil depth, except organic C at 0–5 cm and available P at 5–20 cm.
- Treatment
- level of fertilizatione2
- Outcome
- nutrient distributione2
- Direction
- did not influencee2
- Qualifier
- except for organic C content in the 0–5 cm and available P content in the 5–20 cm depthe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“maize (cv. TZB) and cotton (cv. Sam 71) yields was conducted on a tropical ferruginous soil”
e2“the level of fertilization did not influence nutrient distribution in any soil depth, except for organic C content in the 0–5 cm and available P content in the 5–20 cm depth”
The same questions in other papers
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422 papers in the same direction as this paper · 3,485 in the opposite direction
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See all 3,908 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.