Abstract
Coastal Tableland is a landscape unit in the North East of Brazil in which the main soils are Ultisols. In these soils, a compacted layer denominated "cohesive horizon" occurs and root growth is limited by it. An experiment with five treatments and six replications was set up in order to study how liming and gypsum could improve root depth of orange (Citrus sinensis L. Osbeck) crop in an Ultisol in which a compacted layer was found at 0.3 m. Treatments were: A - No liming and no gypsum; B - Liming to achieve 60% base saturation; C - B + 1 t of gypsum ha-1 ; D - B + 2 t of gypsum ha-1 and E - B + 3 t of gypsum ha-1. Gypsum increased calcium and sulfate in the cohesive horizon. Surface application of lime and gypsum did not cause changes in soil density and total porosity in the cohesive horizon. An improvement of root length was observed at the cohesive horizon.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 3
Claim · model-written summary
Gypsum increased calcium and sulfate in the cohesive horizon.
- Taxon
- Citrus sinensis
Citrus sinensise0 - Treatment
- Gypsume2
- Outcome
- calcium and sulfatee2
- Direction
- increasede2
- Setting
- cohesive horizone2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Gypsum increased calcium and sulfate in the cohesive horizon”
e0“orange (Citrus sinensis L. Osbeck)”
Claim · model-written summary
Surface application of lime and gypsum did not change soil density or total porosity in the cohesive horizon.
- Taxon
- Citrus sinensisCitrus sinensise0
- Treatment
- Surface application of lime and gypsume3
- Outcome
- soil density and total porositye3
- Direction
- did not cause changese3
- Setting
- cohesive horizone3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Surface application of lime and gypsum did not cause changes in soil density and total porosity in the cohesive horizon”
e0“orange (Citrus sinensis L. Osbeck)”
Claim · model-written summary
Liming and gypsum improved orange root length in the cohesive horizon.
- Taxon
- Citrus sinensisCitrus sinensise0
- Treatment
- liming and gypsume1
- Outcome
- root lengthe4
- Direction
- improvemente4
- Setting
- cohesive horizone4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“An improvement of root length was observed at the cohesive horizon”
e1“study how liming and gypsum could improve root depth of orange”
e0“orange (Citrus sinensis L. Osbeck)”
The same questions in other papers
lime · growth · Citrus sinensis (sweet orange)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.