Abstract
Tropical and subtropical soils are acidic and have low nutrient reserves. To know how soil properties affect plant nutrition and crop yield, a field trial examined the effects of surface liming combined with single superphosphate (SSP) by broadcast and in the sowing furrow or phosphogypsum (PG) to the soil surface on the soil chemical properties and nutrition and yield of a wheat-soybean rotation under no-till in Southern Brazil. Surface-applied lime was effective in alleviating soil acidity from the soil surface to a 1.00 m depth. Combining liming with SSP or PG did not provide greater alleviation in acidity across the soil profile than lime alone. Liming increased Ca-leaf and Mg-leaf contents and reduced K-leaf content of wheat, as well as increased leaf contents of N, Ca, and Mg of soybean. Applying SSP, both broadcast or in the sowing furrow, and PG increased P and S leaf contents of wheat and soybean. The cumulative yield of five wheat harvests was increased by 40 % with surface lime, 54 % with surface lime + SSP in the sowing furrow, and 70 % with surface lime + SSP by broadcasting or PG to the soil surface. The cumulative yield of five soybean harvests was increased by 36 % with surface lime, regardless of the addition of SSP and PG. The combined use of surface liming either with broadcast SSP or with PG to the soil surface should be encouraged in a wheat-soybean cropping system under no-till because of the achievement of important increases in wheat yield.
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Claims 12
Claim · model-written summary
Surface lime alleviated soil acidity to 1.00 m.
Not reportedTaxonComparator
Verbatim
e0“Surface-applied lime was effective in alleviating soil acidity from the soil surface to a 1.00 m depth”
Claim · model-written summary
Adding SSP or PG did not improve acidity alleviation beyond lime alone.
- Treatment
- Combining liming with SSP or PGe0
- Outcome
- alleviation in aciditye0
- Direction
- did not provide greatere0
- Comparator
- lime alonee0
Not reportedTaxon
Verbatim
e0“Combining liming with SSP or PG did not provide greater alleviation in acidity across the soil profile than lime alone”
Claim · model-written summary
Liming increased wheat leaf Ca and Mg and reduced leaf K.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Liminge0
- Outcome
- Ca-leaf and Mg-leaf contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming increased Ca-leaf and Mg-leaf contents and reduced K-leaf content of wheat”
Claim · model-written summary
Liming reduced wheat leaf potassium.
- Taxon
- wheatTriticum aestivume0
- Outcome
- K-leaf contente0
- Direction
- reducede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced K-leaf content of wheat”
Claim · model-written summary
Liming increased soybean leaf N, Ca and Mg.
- Taxon
- soybean
Glycine maxe0 - Outcome
- leaf contents of N, Ca, and Mge0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased leaf contents of N, Ca, and Mg of soybean”
Claim · model-written summary
SSP increased wheat and soybean leaf P and S.
- Taxon
- wheatTriticum aestivume0
- Treatment
- SSPe0
- Outcome
- P and S leaf contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying SSP, both broadcast or in the sowing furrow, and PG increased P and S leaf contents of wheat and soybean”
Claim · model-written summary
PG increased wheat and soybean leaf P and S.
- Taxon
- soybeanGlycine maxe0
- Treatment
- PGe0
- Outcome
- P and S leaf contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying SSP, both broadcast or in the sowing furrow, and PG increased P and S leaf contents of wheat and soybean”
Claim · model-written summary
Surface lime increased cumulative wheat yield by 40 %.
- Taxon
- wheatTriticum aestivume0
- Treatment
- surface limee0
- Outcome
- cumulative yielde0
- Direction
- increasede0
- Value
- 40 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cumulative yield of five wheat harvests was increased by 40 % with surface lime”
Claim · model-written summary
Lime plus furrow SSP increased cumulative wheat yield by 54 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- surface lime + SSP in the sowing furrowe0
- Outcome
- cumulative yielde1
- Direction
- increasede1
- Value
- 54 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“54 % with surface lime + SSP in the sowing furrow”
e1“The cumulative yield of five wheat harvests was increased”
t0“wheat-soybean”
Claim · model-written summary
Lime plus broadcast SSP or PG increased cumulative wheat yield by 70 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- surface lime + SSP by broadcasting or PG to the soil surfacee0
- Outcome
- cumulative yielde1
- Direction
- increasede1
- Value
- 70 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“70 % with surface lime + SSP by broadcasting or PG to the soil surface”
e1“The cumulative yield of five wheat harvests was increased”
t0“wheat-soybean”
Claim · model-written summary
Surface lime increased cumulative soybean yield by 36 %.
- Taxon
- soybeanGlycine maxe0
- Treatment
- surface limee0
- Outcome
- cumulative yielde0
- Direction
- increasede0
- Value
- 36 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cumulative yield of five soybean harvests was increased by 36 % with surface lime”
Claim · model-written summary
The authors recommend surface liming with broadcast SSP or PG for no-till wheat-soybean systems.
Verbatim
e0“The combined use of surface liming either with broadcast SSP or with PG to the soil surface should be encouraged in a wheat-soybean cropping system under no-till”
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See all 989 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.