Abstract
The effects of cotton-jowar and cotton-jowar-groundnut rotations maintained for 22 years on a clay soil were studied. Application of farmyard manure at 6 t/ha, and the presence of cotton in the rotation increased the soil organic matter content. Groundnut in rotation increased soil NO3-N but not total-N. The increase in water-stable aggregates (0.25 mm) is attributed to organic matter accumulation. Application of superphosphate did not improve aggregation. Cation exchange capacity was linearly related to organic matter. Jowar yields were increased by NO3-N, but cotton yields were not related to NO3-N.
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Claims 9
Claim · model-written summary
Farmyard manure increased soil organic matter.
- Taxon
- jowar and cottont0
- Treatment
- farmyard manure at 6 t/hae0
- Outcome
- soil organic matter contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Application of farmyard manure at 6 t/ha, and the presence of cotton in the rotation increased the soil organic matter content.”
t0“jowar and cotton”
Claim · model-written summary
Cotton in the rotation increased soil organic matter.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- presence of cotton in the rotatione0
- Outcome
- soil organic matter contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of farmyard manure at 6 t/ha, and the presence of cotton in the rotation increased the soil organic matter content.”
Claim · model-written summary
Groundnut in rotation increased soil NO3-N.
Not reportedComparator
Verbatim
e0“Groundnut in rotation increased soil NO3-N but not total-N.”
t0“jowar and cotton”
Claim · model-written summary
Groundnut in rotation did not increase soil total-N.
Not reportedComparator
Verbatim
e0“Groundnut in rotation increased soil NO3-N but not total-N.”
t0“jowar and cotton”
Claim · model-written summary
Organic matter accumulation was attributed as the cause of increased water stable aggregates.
Verbatim
e0“The increase in water-stable aggregates (0.25 mm) is attributed to organic matter accumulation.”
t0“jowar and cotton”
Claim · model-written summary
Superphosphate did not improve soil aggregation.
Not reportedComparator
Verbatim
e0“Application of superphosphate did not improve aggregation.”
t0“jowar and cotton”
Claim · model-written summary
Cation exchange capacity was linearly related to organic matter.
Not reportedDirection
Verbatim
e0“Cation exchange capacity was linearly related to organic matter.”
t0“jowar and cotton”
Claim · model-written summary
NO3-N increased jowar yield.
Verbatim
e0“Jowar yields were increased by NO3-N”
Claim · model-written summary
Cotton yield was unrelated to NO3-N.
- Taxon
- cottonGossypium hirsutume0
- Compound
- NO3-Ne0
- Outcome
- yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton yields were not related to NO3-N”
The same questions in other papers
rotation · soil: chemistry · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
2 papers more in this group
See all 6 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.