Abstract
From 1997 to 2000 a nutrition experiment was conducted to test the effects, on olive trees (cv.Carolea), of different fertilizers quantities and application methods. The fertilization to soil was made once, at bud break in spring, whereas foliar treatments were repeated four times: before flowering; after fruit set; at pit hardening and at the end of summer, before veraison. Parameters determined include the following: growth rate; percentages of flower bud differentiation; percentages of ovary abortion; fruit set; summer fruit drop and yield at harvest. In order to evaluate the nutritional status of trees, samples of leaves were analysed in April, July and November From the first two years, the trees fertilized with foliar sprays showed an increase in vegetative parameters and yield. From the third year, applications of only foliar fertilizers gave worse results than the fertilization to soil, demonstrating the necessity of fertilizer application to roots. The foliar application of macro-elements increased the productivity of trees, both as an addition to the fertilization to soil and, to a lesser extent, as alternative to it. This suggests that foliar fertilization can be used as a cheap and viable alternative for olive production.
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Claims 5
Claim · model-written summary
Foliar sprays on olive trees (cv. Carolea) increased vegetative parameters and yield in the first two years.
- Taxon
- olive
Olea europaeae1 - Material
- cv.Caroleae1
- Treatment
- foliar sprayse2
- Outcome
- vegetative parameters and yielde2
- Direction
- increasee2
- Qualifier
- From the first two yearse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on olive trees (cv.Carolea)”
e2“From the first two years, the trees fertilized with foliar sprays showed an increase in vegetative parameters and yield”
Claim · model-written summary
Applying only foliar fertilizers from the third year gave worse results than soil fertilization.
- Taxon
- oliveOlea europaeae2
- Treatment
- applications of only foliar fertilizerse1
- Outcome
- resultse1
- Direction
- worsee1
- Qualifier
- From the third yeare1
- Comparator
- fertilization to soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“From the third year, applications of only foliar fertilizers gave worse results than the fertilization to soil”
e2“on olive trees (cv.Carolea)”
Claim · model-written summary
The olive results demonstrate the necessity of fertilizer application to roots.
- Taxon
- oliveOlea europaeae2
- Outcome
- fertilizer application to rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“demonstrating the necessity of fertilizer application to roots”
e2“on olive trees (cv.Carolea)”
Claim · model-written summary
Foliar application of macro-elements increased olive tree productivity as an addition to soil fertilization and, to a lesser extent, as an alternative to it.
- Taxon
- oliveOlea europaeae2
- Treatment
- foliar application of macro-elementse1
- Outcome
- productivity of treese1
- Direction
- increasede1
- Qualifier
- to a lesser extent, as alternative to ite1
- Comparator
- the fertilization to soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The foliar application of macro-elements increased the productivity of trees, both as an addition to the fertilization to soil and, to a lesser extent, as alternative to it”
e2“on olive trees (cv.Carolea)”
Claim · model-written summary
Foliar fertilization can be used as a cheap and viable alternative for olive production.
- Taxon
- oliveOlea europaeae1
- Outcome
- foliar fertilization can be used as a cheap and viable alternative for olive productione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“foliar fertilization can be used as a cheap and viable alternative for olive production”
The same questions in other papers
application · yield · Olea europaea (common olive)Positive and negative results
34 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
32 papers more in this group
See all 36 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.