Abstract
Abstract Different rates of K, Ca, and Mg were applied to bulklots of Decatur clay loam (pH 5.8) which had been collected from an area under natural vegetation. Nitrogen and P were each applied at the rate of 100 ppm. Soybean (Glycine max L.) and corn (Zea mays L.) were planted to pots in four replications of each treatment. Plants were grown for 6 weeks and subsequently all the pots were re‐planted to soybeans. This crop rotation was repeated until six crops had been harvested from each pot. Potassium fertilization did not affect soybean growth but increased the dry matter of corn plants. Calcium application affected the growth of neither crop, but Mg addition to the soil reduced the growth of both crops. The composition of the plants generally reflected the available amounts of each nutrient. Additionally, Mg consistently decreased K in soybeans but increased Mn in the two crops. The inclusion of corn in rotation with soybeans resulted in the following effects on the succeeding soybean harvests: more tolerance to high Mg, greater reduction of plant Ca and Mg caused by K application, and lower levels of available K and Ma in soils and soybeans. However, the greater rate of depletion of soil K and Mn under corn rotation did not appear Co affect the dry matter yields of the following soybean plants relative to the plants under the continuous soybean cropping system. Key words: Soybeancornrotationpotassiumcalciummagnesiummanganese
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Claims 11
Claim · model-written summary
Potassium fertilization did not affect soybean growth.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Potassium fertilizatione0
- Outcome
- soybean growthe0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium fertilization did not affect soybean growth”
Claim · model-written summary
Potassium fertilization increased corn dry matter.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Kt0
- Outcome
- dry matter of corn plantse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the dry matter of corn plants”
t0“K, Ca, and Mg”
Claim · model-written summary
Calcium application did not affect growth of either crop.
- Taxon
- crope0
- Treatment
- Calcium applicatione0
- Outcome
- growth of neither crope0
- Direction
- affected the growth of neithere0
Not reportedComparator
Verbatim
e0“Calcium application affected the growth of neither crop”
Claim · model-written summary
Magnesium addition reduced growth of both crops.
Not reportedComparator
Verbatim
e0“Mg addition to the soil reduced the growth of both crops”
Claim · model-written summary
Plant nutrient composition generally reflected nutrient availability.
- Taxon
- plantsViridiplantaee0
- Compound
- each nutriente0
- Outcome
- composition of the plantse0
Not reportedDirection
Verbatim
e0“The composition of the plants generally reflected the available amounts of each nutrient.”
Claim · model-written summary
Magnesium consistently decreased potassium in soybeans.
- Taxon
- soybeansGlycine maxe0
- Treatment
- Mge0
- Outcome
- K in soybeanse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mg consistently decreased K in soybeans”
Claim · model-written summary
Magnesium increased manganese in both crops.
Not reportedComparator
Verbatim
e0“increased Mn in the two crops”
t0“K, Ca, and Mg”
Claim · model-written summary
Corn rotation increased subsequent soybean tolerance to high magnesium.
- Taxon
- soybeansGlycine maxt0
- Treatment
- corn in rotation with soybeanse0
- Outcome
- tolerance to high Mge0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inclusion of corn in rotation with soybeans resulted in the following effects on the succeeding soybean harvests: more tolerance to high Mg”
t0“re‐planted to soybeans”
Claim · model-written summary
Corn rotation increased reductions of plant calcium and magnesium due to potassium.
- Taxon
- soybeansGlycine maxt0
- Treatment
- corn in rotation with soybeanse0
- Outcome
- plant Ca and Mge0
- Direction
- greater reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inclusion of corn in rotation with soybeans resulted in the following effects on the succeeding soybean harvests: more tolerance to high Mg, greater reduction of plant Ca and Mg caused by K application”
t0“re‐planted to soybeans”
Claim · model-written summary
Corn rotation lowered available potassium and manganese in soil and soybeans.
- Taxon
- soybeansGlycine maxe0
- Treatment
- corn rotationt0
- Outcome
- available K and Ma in soils and soybeanse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower levels of available K and Ma in soils and soybeans”
t0“corn rotation”
Claim · model-written summary
Greater soil K and Mn depletion under corn rotation did not appear to affect subsequent soybean dry matter yield.
- Taxon
- soybeanGlycine maxe0
- Treatment
- corn rotationt0
- Outcome
- dry matter yieldse0
- Direction
- did not appear Co affecte0
- Comparator
- continuous soybean cropping systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not appear Co affect the dry matter yields of the following soybean plants relative to the plants under the continuous soybean cropping system”
t0“corn rotation”
The same questions in other papers
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See all 418 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.