Abstract
Abstract A study was established in 1974 to examine the effects of lime and calcium:magnesium (Ca:Mg) ratio in the limes on alfalfa (Medicago sativa) and birdsfoot trefoil (Lotus corniculatus L.) hay yields and botanical composition of the hay. Lime was applied at rates of 0, 6.7, 13.4, 20.2, and 33.6 Mg/ha to an acid (pH 4.7) Mardin silt loam soil (coarse‐loamy, mixed, mesic typic Fragiochrepts). Using four commercially available lime sources and two mixtures of these lime sources, six Ca:Mg ratios were established for each lime rate. Calcium and/or magnesium sulfate were applied to plots that received no lime to obtain Ca:Mg ratios similar to those on the limed plots. The initial Morgan's solution extractable Ca was 450 mg/kg and Mg was 25 mg/kg. A 5 × 5 Latin Square design with five lime rates and five replications was used with the six Ca:Mg ratios as lime subplots. To improve mixing, portions of each lime treatment were applied before and after plowing in 1974 and after plowing in April of 1975. Alfalfa and birdsfoot trefoil were planted to one‐half of each plot. The hay was harvested two or three times each year for five years. The alfalfa hay yield and legume component were significantly increased by the first two increments of lime (6.7 and 13.4 Mg/ha); however, the birdsfoot trefoil hay and legume component were significantly increased only by the first increment of lime. Maximum yields for the legume component of both crops occurred at a soil pH of 6.5. The Ca:Mg ratios resulting from adding limes with different Ca and Mg contents had no significant effects on the total dry matter hay yields, percent legume in hay or alfalfa and birdsfoot trefoil yields. It is difficult to justify the use of Ca and Mg base saturation ratios for lime recommendations, or for determining the Mg concentration needed within the lime. Soil samples taken in fall of 1976 had mean soil pH values of 4.6, 5.7, 6.1, 6.4, and 6.7 for the five lime rates.
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Claims 9
Claim · model-written summary
Lime at the first two increments significantly increased alfalfa hay yield.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- first two increments of lime (6.7 and 13.4 Mg/ha)e0
- Outcome
- hay yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The alfalfa hay yield and legume component were significantly increased by the first two increments of lime (6.7 and 13.4 Mg/ha)”
Claim · model-written summary
Lime at the first two increments significantly increased the alfalfa legume component.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- first two increments of lime (6.7 and 13.4 Mg/ha)e0
- Outcome
- legume componente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The alfalfa hay yield and legume component were significantly increased by the first two increments of lime (6.7 and 13.4 Mg/ha)”
Claim · model-written summary
Only the first lime increment significantly increased birdsfoot trefoil hay.
Not reportedComparator
Verbatim
e0“the birdsfoot trefoil hay and legume component were significantly increased only by the first increment of lime”
Claim · model-written summary
Only the first lime increment significantly increased the birdsfoot trefoil legume component.
- Taxon
- birdsfoot trefoile0
- Treatment
- first increment of limee0
- Outcome
- legume componente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“the birdsfoot trefoil hay and legume component were significantly increased only by the first increment of lime”
Claim · model-written summary
The maximum legume component yield of both crops occurred at soil pH 6.5.
Verbatim
e0“Maximum yields for the legume component of both crops occurred at a soil pH of 6.5”
Claim · model-written summary
Lime source Ca:Mg ratios had no significant effect on total hay dry matter yield.
- Taxon
- alfalfa and birdsfoot trefoile0
- Treatment
- Ca:Mg ratiose0
- Outcome
- total dry matter hay yieldse0
- Direction
- no significant effectse0
Not reportedComparator
Verbatim
e0“The Ca:Mg ratios resulting from adding limes with different Ca and Mg contents had no significant effects on the total dry matter hay yields, percent legume in hay or alfalfa and birdsfoot trefoil yields”
Claim · model-written summary
Lime source Ca:Mg ratios had no significant effect on percent legume in hay.
- Taxon
- alfalfa and birdsfoot trefoile0
- Treatment
- Ca:Mg ratiose0
- Outcome
- percent legume in haye0
- Direction
- no significant effectse0
Not reportedComparator
Verbatim
e0“The Ca:Mg ratios resulting from adding limes with different Ca and Mg contents had no significant effects on the total dry matter hay yields, percent legume in hay or alfalfa and birdsfoot trefoil yields”
Claim · model-written summary
Lime source Ca:Mg ratios had no significant effect on alfalfa yield.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Ca:Mg ratiose0
- Outcome
- alfalfa and birdsfoot trefoil yieldse0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Ca:Mg ratios resulting from adding limes with different Ca and Mg contents had no significant effects on the total dry matter hay yields, percent legume in hay or alfalfa and birdsfoot trefoil yields”
Claim · model-written summary
Ca:Mg base saturation ratios are difficult to justify for lime recommendations.
- Outcome
- use of Ca and Mg base saturation ratios for lime recommendationse0
Not reportedTaxon
Verbatim
e0“It is difficult to justify the use of Ca and Mg base saturation ratios for lime recommendations, or for determining the Mg concentration needed within the lime”
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See all 50 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.