Abstract
Field experiments designed to reveal the effects of certain management practices and fertilizer applications on the nutritional status of highbush blueberries (Vaccinium corymbosum) were conducted during the summer of 1967. The concentration of N and Ca in the leaf tissue of plants receiving general grower care are similar to Ballinger's estimated deficiency levels while that of Mn was very high. Mn levels were higher in plants growing on the highly decomposed peats. The application of N or NPK increased the concentration of these individual elements. Increases in N appeared to depress the uptake of Mg and encourage the utilization of P. Certain management practices improved nutrient utilization especially under the high fertilizer treatment regime. A negative correlation existed between N and growth ratings in 2 of the 3 experiments. There was no indication that herbicides reduced the uptake of nutrient elements. The leaf levels of the cations Mg, Ca and Mn all declined as the yield increased. Soil temperature and moisture levels were consistently greater in hoed and herbicide treated plots than in mowed plots.
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 13
Claim · model-written summary
Leaf N and Ca under grower care were similar to estimated deficiency levels.
- Taxon
- highbush blueberries
Vaccinium corymbosumt0 - Treatment
- general grower caree0
- Outcome
- concentration of N and Cae0
- Comparator
- Ballinger's estimated deficiency levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of N and Ca in the leaf tissue of plants receiving general grower care are similar to Ballinger's estimated deficiency levels”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Leaf Mn under grower care was very high.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Outcome
- Mne0
- Direction
- very highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while that of Mn was very high”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Mn was higher on highly decomposed peats.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Outcome
- Mn levelse0
- Direction
- highere0
- Setting
- highly decomposed peatse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mn levels were higher in plants growing on the highly decomposed peats”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
N application increased N concentration.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- Ne0
- Outcome
- concentration of these individual elementse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N or NPK increased the concentration of these individual elements”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
NPK application increased corresponding element concentrations.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- NPKe0
- Outcome
- concentration of these individual elementse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N or NPK increased the concentration of these individual elements”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Increased N appeared to depress Mg uptake.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- Increases in Ne0
- Outcome
- uptake of Mge0
- Direction
- depresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in N appeared to depress the uptake of Mg”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Increased N appeared to encourage P utilization.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- Increases in Ne0
- Outcome
- utilization of Pe0
- Direction
- encouragee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in N appeared to depress the uptake of Mg and encourage the utilization of P”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Some management practices improved nutrient utilization, especially with high fertilizer.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- Certain management practicese0
- Outcome
- nutrient utilizatione0
- Direction
- improvede0
- Qualifier
- high fertilizer treatment regimee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Certain management practices improved nutrient utilization especially under the high fertilizer treatment regime”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
N and growth ratings were negatively correlated in two of three experiments.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Compound
- Ne0
- Outcome
- growth ratingse0
- Direction
- negative correlatione0
- Value
- 2 of the 3 experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A negative correlation existed between N and growth ratings in 2 of the 3 experiments”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Herbicides showed no indication of reduced nutrient uptake.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- herbicidese0
- Outcome
- uptake of nutrient elementse0
- Direction
- no indicatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no indication that herbicides reduced the uptake of nutrient elements”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Leaf Mg, Ca and Mn levels declined as yield increased.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Organ / stage
- leafe0
- Outcome
- leaf levels of the cations Mg, Ca and Mne0
- Direction
- declinede0
- Qualifier
- yield increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf levels of the cations Mg, Ca and Mn all declined as the yield increased”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Soil temperature was greater in hoed and herbicide treated plots than mowed plots.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- hoed and herbicide treated plotse0
- Outcome
- Soil temperaturee0
- Direction
- greatere0
- Comparator
- mowed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil temperature and moisture levels were consistently greater in hoed and herbicide treated plots than in mowed plots”
t0“highbush blueberries (Vaccinium corymbosum)”
Claim · model-written summary
Soil moisture was greater in hoed and herbicide treated plots than mowed plots.
- Taxon
- highbush blueberriesVaccinium corymbosumt0
- Treatment
- hoed and herbicide treated plotse0
- Outcome
- moisture levelse0
- Direction
- greatere0
- Comparator
- mowed plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil temperature and moisture levels were consistently greater in hoed and herbicide treated plots than in mowed plots”
t0“highbush blueberries (Vaccinium corymbosum)”
The same questions in other papers
nitrogen · molecular: metabolites · Vaccinium corymbosum (highbush blueberry)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- positive
1 paper more in this group
See all 5 papers →fertilization · molecular: metabolites · Vaccinium corymbosum (highbush blueberry)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- no effect
3 papers more in this group
See all 7 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.