Abstract
Abstract Puddling is the most common method of land preparation for wetland rice ( Oryza sativa L.) in south and southeast Asia. While this method has certain advantages, it is time‐, energy‐, and capitalintensive. The objective of this study was to identify time‐, energy‐, and capital‐efficient tillage techniques for sustained productivity of wetland rice soils. The effects of different land preparation techniques on soil physical properties, root growth, and grain yield of wetland rice (cv. IR36) on two Philippine (IRRI) soils are reported. Bulk density, penetration resistance, and temperature of surface soil layers decreased with tillage intensity. In clay soil (Andaqueptic Haplaquoll with a water table of 0.30 m), the average daily water use (percolation + seepage + evapotranspiration) during a 90‐d irrigation period for zero tillage (dry‐seeded rice) was 37 mm d −1 ; zero tillage (transplanted rice), 35 mm d −1 ; minimum tillage, 34 mm d −1 ; and puddling, 30 mm d −1 . The corresponding values for the clay loam (Typic Argiudoll with a water table > 1.2 m) were 393, 501, 263, and 164 mm d −1 , respectively. Root‐length density (RLD) at the 0‐ to 0.10‐m depth at harvest was negatively correlated with soil bulk density at transplanting. On the other hand, grain yield was positively correlated with RLD, but negatively correlated with bulk density and soil penetration resistance and was less on zero‐tilled than on tilled plots. For the clay soil, grain yield (two‐season average) with minimum tillage was 26% higher than with zero tillage. for shallow puddling (one‐season data) and puddling, the figures were 33 and 28% higher. The corresponding values in clay loam soil were 36,66, and 56%, respectively. Zero and minimum tillage plots dried faster than puddled plots after they were drained at harvest; surface cracking was higher in puddled plots. In the clay soil and in both seasons, minimum tillage produced the same grain yield as puddling, and in such soil, minimum tillage may be an alternative to puddling, provided weeds are controlled.
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Claims 11
Claim · model-written summary
More intensive tillage reduced surface soil bulk density, penetration resistance and temperature.
- Taxon
- Rice
Oryza sativat0 - Treatment
- tillage intensitye0
- Outcome
- Bulk density, penetration resistance, and temperature of surface soil layerse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“Bulk density, penetration resistance, and temperature of surface soil layers decreased with tillage intensity.”
Claim · model-written summary
Water use in clay soil was 37, 35, 34 and 30 mm d −1 for dry-seeded zero tillage, transplanted zero tillage, minimum tillage and puddling, respectively.
- Taxon
- RiceOryza sativat0
- Treatment
- zero tillage (dry‐seeded rice)e0
- Outcome
- average daily water usee0
- Value
- 37 mm d −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“In clay soil (Andaqueptic Haplaquoll with a water table of 0.30 m), the average daily water use (percolation + seepage + evapotranspiration) during a 90‐d irrigation period for zero tillage (dry‐seeded rice) was 37 mm d −1 ; zero tillage (transplanted rice), 35 mm d −1 ; minimum tillage, 34 mm d −1 ; and puddling, 30 mm d −1 .”
Claim · model-written summary
Root-length density was negatively correlated with soil bulk density.
- Taxon
- RiceOryza sativat0
- Outcome
- Root‐length density (RLD)e0
- Direction
- negativelye0
- Comparator
- soil bulk densitye0
- Setting
- 0‐ to 0.10‐m depthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“Root‐length density (RLD) at the 0‐ to 0.10‐m depth at harvest was negatively correlated with soil bulk density at transplanting.”
Claim · model-written summary
Rice yield correlated positively with root-length density and negatively with bulk density and penetration resistance.
- Taxon
- RiceOryza sativat0
- Outcome
- grain yielde0
- Direction
- positivelye0
- Comparator
- RLDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“grain yield was positively correlated with RLD, but negatively correlated with bulk density and soil penetration resistance”
Claim · model-written summary
Grain yield was lower under zero tillage than tilled plots.
- Taxon
- RiceOryza sativat0
- Treatment
- zero‐tillede0
- Outcome
- grain yielde1
- Direction
- lesse0
- Comparator
- tilled plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“was less on zero‐tilled than on tilled plots”
e1“grain yield was positively correlated with RLD”
Claim · model-written summary
In clay soil, minimum tillage increased two-season grain yield 26% over zero tillage.
- Taxon
- RiceOryza sativat0
- Treatment
- minimum tillagee0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 26%e0
- Comparator
- zero tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“For the clay soil, grain yield (two‐season average) with minimum tillage was 26% higher than with zero tillage.”
Claim · model-written summary
In clay soil, shallow puddling increased grain yield 33% over zero tillage.
- Taxon
- RiceOryza sativat0
- Treatment
- shallow puddlinge0
- Outcome
- grain yielde1
- Direction
- highere0
- Value
- 33e0
- Comparator
- zero tillagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“for shallow puddling (one‐season data) and puddling, the figures were 33 and 28% higher.”
e1“For the clay soil, grain yield (two‐season average) with minimum tillage was 26% higher than with zero tillage.”
Claim · model-written summary
In clay soil, puddling increased grain yield 28% over zero tillage.
- Taxon
- RiceOryza sativat0
- Treatment
- puddlinge0
- Outcome
- grain yielde1
- Direction
- highere0
- Value
- 28%e0
- Comparator
- zero tillagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“for shallow puddling (one‐season data) and puddling, the figures were 33 and 28% higher.”
e1“For the clay soil, grain yield (two‐season average) with minimum tillage was 26% higher than with zero tillage.”
Claim · model-written summary
Zero and minimum tillage dried faster after drainage than puddling, while puddling cracked more.
- Taxon
- RiceOryza sativat0
- Treatment
- Zero and minimum tillagee0
- Outcome
- dried fastere0
- Direction
- fastere0
- Comparator
- puddled plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“Zero and minimum tillage plots dried faster than puddled plots after they were drained at harvest; surface cracking was higher in puddled plots.”
Claim · model-written summary
Minimum tillage gave the same grain yield as puddling in clay soil over both seasons.
- Taxon
- RiceOryza sativat0
- Treatment
- minimum tillagee0
- Outcome
- grain yielde0
- Direction
- samee0
- Comparator
- puddlinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“In the clay soil and in both seasons, minimum tillage produced the same grain yield as puddling”
Claim · model-written summary
Minimum tillage may replace puddling in clay soil if weeds are controlled.
- Taxon
- RiceOryza sativat0
- Outcome
- minimum tillage may be an alternative to puddlinge0
- Qualifier
- provided weeds are controllede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Yield”
e0“in such soil, minimum tillage may be an alternative to puddling, provided weeds are controlled”
The same questions in other papers
tillage · yield · Oryza sativa (rice)Positive and negative results
586 papers in the same direction as this paper · 115 in the opposite direction · 27 reporting no difference from an alternative
- no effect
- positive
- positive
725 papers more in this group
See all 729 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.