Abstract
Abstract In the greenhouse, corn plants, 14 days old, were transplanted to 1‐gallon, soft glass jars containing nutrient solutions. Boron levels were maintained at 0, 0.01, 0.05, and 0.25 ppm. One set of plants was grown for 3, 6, or 9 weeks at each of the boron levels, after which the boron was removed. One set at each boron level received boron to maturity. All other nutrients were maintained at adequate balanced levels. Plants grown without boron or those at the 0.01‐ and 0.05‐ppm. boron level did not produce ears or had very poorly developed barren ears, depending on the length of time in the boron solution. Fully developed ears were produced at the 0.25‐ppm. concentration when maintained to maturity, but barren ears resulted when boron was removed earlier. In field trials 15 pounds per acre of fertilizer borate was sidedressed in bands 18 inches wide with a hand duster, when the corn was a foot high, and resulting tissue analyzed. Boron application resulted in increased yields and reduced the number of blank stalks, when present, on 11% of the fields tested. It was concluded that: ( 1 ) a lack of boron can cause blank stalks and barren ears; ( 2 ), the supply of available boron must be continuous; and ( 3 ), the critical level of boron in the upper leaves appears to be in between 11 to 13 ppm.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Corn at zero or low boron levels produced no ears or poorly developed barren ears, depending on treatment duration.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- without boron or those at the 0.01‐ and 0.05‐ppm. boron levele0
- Outcome
- earse0
- Direction
- did not produce ears or had very poorly developed barren earse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown without boron or those at the 0.01‐ and 0.05‐ppm. boron level did not produce ears or had very poorly developed barren ears, depending on the length of time in the boron solution”
t0“Corn”
Claim · model-written summary
Corn maintained at the 0.25 ppm boron concentration to maturity produced fully developed ears.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 0.25‐ppm. concentratione0
- Outcome
- Fully developed earse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fully developed ears were produced at the 0.25‐ppm. concentration when maintained to maturity”
t0“Corn”
Claim · model-written summary
Removing boron earlier resulted in barren ears.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- boron was removed earliere0
- Outcome
- barren earse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but barren ears resulted when boron was removed earlier”
t0“Corn”
Claim · model-written summary
Field boron application increased corn yields.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Boron applicatione0
- Outcome
- yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron application resulted in increased yields”
t0“Corn”
Claim · model-written summary
Field boron application reduced blank stalk numbers where present in 11% of fields.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Boron applicatione1
- Outcome
- number of blank stalkse0
- Direction
- reducede0
- Value
- 11%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced the number of blank stalks, when present, on 11% of the fields tested”
t0“Corn”
e1“Boron application resulted in increased yields”
Claim · model-written summary
The authors placed the critical boron level in upper leaves between 11 and 13 ppm.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- upper leavese0
- Outcome
- critical level of boron in the upper leavese0
- Value
- 11 to 13 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the critical level of boron in the upper leaves appears to be in between 11 to 13 ppm”
t0“Corn”
The same questions in other papers
boron atom · yield · Zea mays (maize)Results differ
71 papers in the same direction as this paper · 11 in the opposite direction
- positive
- negative
- no effect
79 papers more in this group
See all 83 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.