Abstract
Experimental data were compiled for seven soybean varieties studied at four different locations in the U.S. for a period of one to three years. Three dose–response functions (linear, quadratic, and Weibull) were fitted, as appropriate, to the experimental data. Effects of acid deposition on soybean yields were estimated by combining variety‐specific dose–response and production data. These calculations suggest that U.S. soybean production (2.2 billion bushels in 1982) would increase by 3.2 million bushels with a 10% reduction in 1982 hydrogen ion concentration levels in all counties where soybeans were grown, and by almost 70 million bushels with uniform improvement to pH 5.2. These estimates are based on many simplifying assumptions and are subject to several important sources of uncertainty explored in this study. The calculated changes are small in comparison with effects from other natural and anthropogenic stresses.
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Claims 3
Claim · model-written summary
A 10% reduction in 1982 hydrogen ion concentration was calculated to increase US soybean production by 3.2 million bushels.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- 10% reduction in 1982 hydrogen ion concentration levelse0
- Outcome
- U.S. soybean productione0
- Direction
- increasee0
- Value
- 3.2 million bushelse0
- Setting
- U.S.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“U.S. soybean production (2.2 billion bushels in 1982) would increase by 3.2 million bushels with a 10% reduction in 1982 hydrogen ion concentration levels in all counties where soybeans were grown”
Claim · model-written summary
Uniform improvement to pH 5.2 was calculated to increase US soybean production by almost 70 million bushels.
- Taxon
- soybeansGlycine maxe0
- Treatment
- uniform improvement to pH 5.2e0
- Outcome
- U.S. soybean productione0
- Direction
- increasee0
- Value
- almost 70 million bushelse0
- Setting
- U.S.e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“U.S. soybean production (2.2 billion bushels in 1982) would increase by 3.2 million bushels with a 10% reduction in 1982 hydrogen ion concentration levels in all counties where soybeans were grown, and by almost 70 million bushels with uniform improvement to pH 5.2”
Claim · model-written summary
Calculated yield changes were small relative to effects of other stresses.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- calculated changese0
- Direction
- smalle0
- Comparator
- effects from other natural and anthropogenic stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The calculated changes are small in comparison with effects from other natural and anthropogenic stresses.”
t0“Soybean”
The same questions in other papers
ph · yield · Glycine max (soybean)Positive and negative results
12 papers in the same direction as this paper · 13 in the opposite direction
- negative
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See all 26 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.