Abstract
SYNOPSIS Two years of severe nitrogen deficiency in avocado trees under field conditions, resulted in restricted growth, small pale leaves, early leaf shedding and reduced yield. In addition, N-deficient trees suffered more frost damage than healthy trees. After fertilisation had been resumed, three types of leaves were sampled monthly over the course of an entire year: the previous year's leaves, leaves from the spring flush and leaves from the second flush (summer). In all three leaf types and throughout the year, N-concentration was significantly lower in the N-deficient trees than in the fertilised ones. A significant difference was also found between spring and summer leaves.
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Claims 6
Claim · model-written summary
Two years of severe nitrogen deficiency reduced yield of avocado trees under field conditions.
- Taxon
- avocado
Persea americanae1 - Treatment
- severe nitrogen deficiencye1
- Outcome
- yielde1
- Direction
- reducede1
- Setting
- under field conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two years of severe nitrogen deficiency in avocado trees under field conditions, resulted in restricted growth, small pale leaves, early leaf shedding and reduced yield”
Claim · model-written summary
Two years of severe nitrogen deficiency restricted growth of avocado trees.
- Taxon
- avocadoPersea americanae1
- Treatment
- severe nitrogen deficiencye1
- Outcome
- growthe1
- Direction
- restrictede1
- Setting
- under field conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two years of severe nitrogen deficiency in avocado trees under field conditions, resulted in restricted growth, small pale leaves, early leaf shedding and reduced yield”
Claim · model-written summary
Two years of severe nitrogen deficiency caused small pale leaves and early leaf shedding in avocado trees.
- Taxon
- avocadoPersea americanae1
- Treatment
- severe nitrogen deficiencye1
- Outcome
- small pale leaves, early leaf sheddinge1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two years of severe nitrogen deficiency in avocado trees under field conditions, resulted in restricted growth, small pale leaves, early leaf shedding and reduced yield”
Claim · model-written summary
N-deficient avocado trees suffered more frost damage than healthy trees.
- Taxon
- avocadoPersea americanat0
- Treatment
- N-deficiente2
- Outcome
- frost damagee2
- Direction
- moree2
- Comparator
- healthy treese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seasonal changes in nitrogen concentration in avocado leaves”
e2“N-deficient trees suffered more frost damage than healthy trees”
Claim · model-written summary
Leaf N-concentration was significantly lower in N-deficient avocado trees than in fertilised trees in all three leaf types and throughout the year.
- Taxon
- avocadoPersea americanat0
- Organ / stage
- all three leaf typese3
- Treatment
- N-deficient treese3
- Outcome
- N-concentratione3
- Direction
- lowere3
- Qualifier
- throughout the yeare3
- Comparator
- fertilised onese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seasonal changes in nitrogen concentration in avocado leaves”
e3“In all three leaf types and throughout the year, N-concentration was significantly lower in the N-deficient trees than in the fertilised ones”
Claim · model-written summary
A significant difference was found between spring and summer leaves of avocado.
- Taxon
- avocadoPersea americanat0
- Organ / stage
- spring and summer leavese4
- Outcome
- differencee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Seasonal changes in nitrogen concentration in avocado leaves”
e4“A significant difference was also found between spring and summer leaves”
The same questions in other papers
nitrogen · growth · Persea americana (avocado)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
nitrogen · yield · Persea americana (avocado)Results agree
4 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
1 paper more in this group
See all 5 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.