Abstract
Field experiments were conducted on two soil types over a period of five years (1986–1990) to investigate the effects of tied ridges and planting systems on the grain yield response of maize to applications of crop residue and residual N and P fertilizers. Grain yields were increased by the use of tied ridges. Further increases in grain yields resulted from residual N and P and crop residue applied separately or together. Under all fertilization practices, planting in the furrow of tied ridges resulted in higher grain yields than planting on top of tied ridges. The effect of the tied ridges in increasing grain yields was generally better in the drier periods and the more so when the ends of the ridges were tied. In wetter seasons the open end tied ridges gave higher yields than the closed end tied ridges. The effect of tied ridges on grain yield response of maize to application of crop residue and residual N and P fertilizers was influenced by rainfall and by soil type.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Tied ridges increased maize grain yields.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were increased by the use of tied ridges”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
Residual N and P and crop residue, applied separately or together, gave further increases in maize grain yields.
- Treatment
- residual N and P and crop residue applied separately or togethere0
- Outcome
- grain yieldse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further increases in grain yields resulted from residual N and P and crop residue applied separately or together”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
Under all fertilization practices, planting maize in the furrow of tied ridges gave higher grain yields than planting on top of tied ridges.
- Treatment
- planting in the furrow of tied ridgese0
- Outcome
- grain yieldse0
- Direction
- highere0
- Comparator
- planting on top of tied ridgese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“planting in the furrow of tied ridges resulted in higher grain yields than planting on top of tied ridges”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
The grain yield increase from tied ridges was generally larger in drier periods.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of the tied ridges in increasing grain yields was generally better in the drier periods”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
The grain yield increase from tied ridges in drier periods was larger still when the ends of the ridges were tied.
- Treatment
- the ends of the ridges were tiede0
- Outcome
- grain yieldse1
- Direction
- increasinge1
- Qualifier
- drier periodse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the more so when the ends of the ridges were tied”
e1“The effect of the tied ridges in increasing grain yields was generally better in the drier periods”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
In wetter seasons, open end tied ridges gave higher maize yields than closed end tied ridges.
- Treatment
- open end tied ridgese0
- Outcome
- yieldse0
- Direction
- highere0
- Qualifier
- wetter seasonse0
- Comparator
- closed end tied ridgese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wetter seasons the open end tied ridges gave higher yields than the closed end tied ridges”
t0“Maize ( Zea mays L. )”
Claim · model-written summary
The effect of tied ridges on the grain yield response of maize to crop residue and residual N and P was influenced by rainfall and by soil type.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of tied ridges on grain yield response of maize to application of crop residue and residual N and P fertilizers was influenced by rainfall and by soil type”
The same questions in other papers
organic · yield · Zea mays (maize)Positive and negative results
329 papers in the same direction as this paper · 32 in the opposite direction · 11 reporting no difference from an alternative
- no effect
- negative
- no effect
369 papers more in this group
See all 373 papers →phosphorus · yield · Zea mays (maize)Positive and negative results
548 papers in the same direction as this paper · 69 in the opposite direction · 9 reporting no difference from an alternative
- no effect
- no effect
- negative
623 papers more in this group
See all 627 papers →irrigation · yield · Zea mays (maize)Positive and negative results
790 papers in the same direction as this paper · 209 in the opposite direction · 16 reporting no difference from an alternative
- negative
- no effect
- negative
1,012 papers more in this group
See all 1,016 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
- positive
- positive
- negative
2,181 papers more in this group
See all 2,185 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.