Abstract
Cotton and sorghum yield were more dependent on precipitation than tillage management. No‐till produced a greater cotton and sorghum crop yield in some years. Economic analyses indicate a reduction of costs with no‐till versus conventional practices. Conventional tillage (CT) cropping systems in semiarid regions of south Texas are associated with soil degradation and increasing fuel costs. The objective of the study was to evaluate the effects of no‐till (NT) compared with CT on a dryland cotton ( Gossypium hirsutum L.)–grain sorghum [ Sorghum bicolor (L.) Moench] rotation system with respect to crop yields, yield stability, soil moisture and structure, and economics. The experiment (four replicated plots of each crop and tillage treatment annually) was conducted on a Vertisol at Corpus Christi, TX, from 2011 to 2015. Cotton yield was similar among tillage treatments, except for the drought year of 2013 when 86% greater yield occurred with NT and above average precipitation year of 2015 (15% greater yield for NT). Sorghum yield was impacted by tillage in 2012 when NT produced 33% greater yield than CT, whereas, in 2015, CT produced 28% greater yield. Yields were stable across crops and tillage treatment. Soil moisture was not impacted by tillage treatment; however, tillage caused bulk density to increase at 15‐ to 30‐cm depth compared with 0‐ to 15‐cm depth. All soil chemical properties remained constant, except NT had greater total soil N than CT in 2015. Cash costs for CT were greater than NT for both crops, and net cash farm income was positive only for NT cotton. No‐till is a viable alternative for dryland farmers in this region because of stable yields and increased income.
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Claims 12
Claim · model-written summary
Cotton and sorghum yield depended more on precipitation than on tillage management.
- Taxon
- Cotton and sorghum
Gossypium hirsutum
Sorghume0 - Treatment
- precipitatione0
- Outcome
- yielde0
- Direction
- more dependente0
- Comparator
- tillage managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
Claim · model-written summary
No-till produced 86% greater cotton yield than conventional tillage in the 2013 drought year.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- NTe0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 86%e0
- Qualifier
- drought year of 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield was similar among tillage treatments, except for the drought year of 2013 when 86% greater yield occurred with NT”
Claim · model-written summary
No-till produced 15% greater cotton yield in the above-average precipitation year 2015.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- NTe1
- Outcome
- yielde1
- Direction
- greatere1
- Value
- 15%e1
- Qualifier
- above average precipitation year of 2015e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield was similar among tillage treatments”
e1“above average precipitation year of 2015 (15% greater yield for NT)”
Claim · model-written summary
No-till produced 33% greater sorghum yield than conventional tillage in 2012.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum yield was impacted by tillage in 2012 when NT produced 33% greater yield than CT, whereas, in 2015, CT produced 28% greater yield”
Claim · model-written summary
Conventional tillage produced 28% greater sorghum yield than no-till in 2015.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum yield was impacted by tillage in 2012 when NT produced 33% greater yield than CT, whereas, in 2015, CT produced 28% greater yield”
Claim · model-written summary
Yields of cotton and sorghum were stable across tillage treatments.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Treatment
- tillage treatmente1
- Outcome
- Yieldse1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“Yields were stable across crops and tillage treatment”
Claim · model-written summary
Soil moisture was not affected by tillage treatment.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Treatment
- tillage treatmente1
- Outcome
- Soil moisturee1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“Soil moisture was not impacted by tillage treatment”
Claim · model-written summary
Tillage increased soil bulk density.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Treatment
- tillagee1
- Outcome
- bulk densitye1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“tillage caused bulk density to increase”
Claim · model-written summary
No-till had greater total soil N than conventional tillage in 2015.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Treatment
- NTe1
- Outcome
- total soil Ne1
- Direction
- greatere1
- Qualifier
- 2015e1
- Comparator
- CTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“All soil chemical properties remained constant, except NT had greater total soil N than CT in 2015”
Claim · model-written summary
Cash costs were greater under conventional tillage than under no-till for both crops.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Treatment
- CTe1
- Outcome
- Cash costse1
- Direction
- greatere1
- Comparator
- NTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“Cash costs for CT were greater than NT for both crops”
Claim · model-written summary
Net cash farm income was positive only for no-till cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- NTe0
- Outcome
- net cash farm incomee0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“net cash farm income was positive only for NT cotton”
Claim · model-written summary
No-till is a viable alternative for dryland farmers in this region.
- Taxon
- Cotton and sorghumGossypium hirsutumSorghume0
- Outcome
- viable alternative for dryland farmers in this regione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton and sorghum yield were more dependent on precipitation than tillage management”
e1“viable alternative for dryland farmers in this region”
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See all 159 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.