Abstract
An Entic Haplorthod, cropped for many years to potatoes, was used for plant pot and chemical studies involving the effects of pH increases by liming on the availability of B and P to Zea mays L. and Medicago sativa L. Increasing amounts of B added to the soil increased yields and B contents of alfalfa but caused increased toxicity symptoms in corn. Boron toxicity in corn was prevented by pH values above 6. When only the standard rate of P was applied, best growth of both crops was in soil at pH values from 5 to 5.7. When pH values were above 6, growth was retarded by deficiency of P. At pH values above 6, the addition of the high rate of P practically doubled dry-weight yields of corn and produced more than 20-fold increases in alfalfa yields. Deficiency of P induced by liming decreased with time. Parallel behavior of B and P in this study supports the hypothesis that both elements may be bound in podzolized soils by similar pH-dependent mechanisms, probably precipitation or adsorption by hydroxy Al. 14 references, 3 figures, 3 tables.
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Claims 11
Claim · model-written summary
Adding more boron increased alfalfa yields.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- Increasing amounts of B added to the soile0
- Outcome
- yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing amounts of B added to the soil increased yields and B contents of alfalfa”
Claim · model-written summary
Adding more boron increased alfalfa boron contents.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Increasing amounts of B added to the soile0
- Outcome
- B contents of alfalfae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing amounts of B added to the soil increased yields and B contents of alfalfa”
Claim · model-written summary
Adding more boron increased toxicity symptoms in corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Increasing amounts of B added to the soile0
- Outcome
- toxicity symptoms in corne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing amounts of B added to the soil increased yields and B contents of alfalfa but caused increased toxicity symptoms in corn”
Claim · model-written summary
Soil pH above 6 prevented boron toxicity in corn.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- pH values above 6e0
- Outcome
- Boron toxicity in corne0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron toxicity in corn was prevented by pH values above 6”
Claim · model-written summary
With standard phosphorus, corn grew best at soil pH 5 to 5.7.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- standard rate of Pe0
- Outcome
- best growthe0
- Direction
- beste0
- Value
- pH values from 5 to 5.7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When only the standard rate of P was applied, best growth of both crops was in soil at pH values from 5 to 5.7”
e1“toxicity symptoms in corn”
Claim · model-written summary
With standard phosphorus, alfalfa grew best at soil pH 5 to 5.7.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- standard rate of Pe0
- Outcome
- best growthe0
- Direction
- beste0
- Value
- pH values from 5 to 5.7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When only the standard rate of P was applied, best growth of both crops was in soil at pH values from 5 to 5.7”
e1“yields and B contents of alfalfa”
Claim · model-written summary
At pH above 6, phosphorus deficiency retarded crop growth.
- Taxon
- cornZea mays subsp. mayse2
- Outcome
- growthe0
- Direction
- retardede0
- Qualifier
- deficiency of Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When pH values were above 6, growth was retarded by deficiency of P”
e1“both crops”
e2“toxicity symptoms in corn”
Claim · model-written summary
At pH above 6, high phosphorus nearly doubled corn dry-weight yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- high rate of Pe0
- Outcome
- dry-weight yields of corne0
- Direction
- doublede0
- Value
- practically doublede0
- Qualifier
- pH values above 6e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At pH values above 6, the addition of the high rate of P practically doubled dry-weight yields of corn”
Claim · model-written summary
At pH above 6, high phosphorus increased alfalfa yield more than twentyfold.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- high rate of Pe0
- Outcome
- alfalfa yieldse0
- Direction
- increasese0
- Value
- more than 20-folde0
- Qualifier
- pH values above 6e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At pH values above 6, the addition of the high rate of P practically doubled dry-weight yields of corn and produced more than 20-fold increases in alfalfa yields”
Claim · model-written summary
Liming-induced phosphorus deficiency decreased with time.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- liminge0
- Outcome
- Deficiency of Pe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficiency of P induced by liming decreased with time”
e1“yields and B contents of alfalfa”
Claim · model-written summary
Parallel boron and phosphorus behavior supports a common pH-dependent soil binding mechanism.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- Parallel behavior of B and Pe0
- Qualifier
- similar pH-dependent mechanisms, probably precipitation or adsorption by hydroxy Ale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Parallel behavior of B and P in this study supports the hypothesis that both elements may be bound in podzolized soils by similar pH-dependent mechanisms, probably precipitation or adsorption by hydroxy Al”
e1“yields and B contents of alfalfa”
The same questions in other papers
ph · pest · Zea mays (maize)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
7 papers more in this group
See all 11 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.