Abstract
ABSTRACT This investigation examined the hypothesis that nutrient deficiency is related to the die-back of Terminalia ivorensis . The study was conducted on three major soil groups in natural forest and T. ivorensis plantations. Five soil chemical factors, Total nitrogen, organic carbon, effective CEC, exchangeable calcium and magnesium, were positively related to die-back. Foliar nitrogen concentrations in trees suffering from die-back were almost 50% of those of healthy trees. The concentrations of magnesium in the leaves of T. ivorensis experiencing die-back were also low. Conversely, high concentrations of foliar calcium were associated with trees under stress. A highly significant relationship was observed between die-back ranks and leaf size.
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Claims 6
Claim · model-written summary
Total nitrogen, organic carbon and effective CEC of the soil were positively related to Terminalia ivorensis die-back.
- Taxon
- Terminalia ivorensisTerminalia ivorensise0
- Compound
- Total nitrogen, organic carbon, effective CECe1
- Outcome
- die-backe1
- Direction
- positively relatede1
Verbatim
e0“the die-back of Terminalia ivorensis”
e1“Five soil chemical factors, Total nitrogen, organic carbon, effective CEC, exchangeable calcium and magnesium, were positively related to die-back”
Claim · model-written summary
Exchangeable calcium and magnesium of the soil were positively related to Terminalia ivorensis die-back.
- Taxon
- Terminalia ivorensisTerminalia ivorensise0
- Compound
- exchangeable calcium and magnesiume1
- Outcome
- die-backe1
- Direction
- positively relatede1
Verbatim
e0“the die-back of Terminalia ivorensis”
e1“Five soil chemical factors, Total nitrogen, organic carbon, effective CEC, exchangeable calcium and magnesium, were positively related to die-back”
Claim · model-written summary
Foliar nitrogen concentrations in trees suffering from die-back were almost 50% of those of healthy trees.
Verbatim
e0“the die-back of Terminalia ivorensis”
e2“Foliar nitrogen concentrations in trees suffering from die-back were almost 50% of those of healthy trees”
Claim · model-written summary
Magnesium concentrations in the leaves of T. ivorensis with die-back were low.
Verbatim
e3“The concentrations of magnesium in the leaves of T. ivorensis experiencing die-back were also low”
Claim · model-written summary
High foliar calcium concentrations were associated with Terminalia ivorensis trees under stress.
- Taxon
- Terminalia ivorensisTerminalia ivorensise0
- Compound
- foliar calciume4
- Outcome
- trees under stresse4
- Direction
- higherinferrede4
Verbatim
e0“the die-back of Terminalia ivorensis”
e4“Conversely, high concentrations of foliar calcium were associated with trees under stress”
Claim · model-written summary
Die-back ranks were significantly related to leaf size in Terminalia ivorensis.
- Taxon
- Terminalia ivorensisTerminalia ivorensise0
- Organ / stage
- leafe5
- Outcome
- die-back rankse5
Not reportedDirection
Verbatim
e0“the die-back of Terminalia ivorensis”
e5“A highly significant relationship was observed between die-back ranks and leaf size”