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By Pierre Makyo

ISBN-10: 2723445739

ISBN-13: 9782723445733

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Extra resources for L'Histoire de chaque jour, Tome 1 : Lise a souvent peur

Example text

But such explanations do not seem to explain all the unsatisfactory results. Although several calibration exercises may be needed to ascertain definitively the existence of regional biases, the underestimation of damage by local teams coincides with the two regions (Massif Central, Pyrenees) which overall (apparently) show the lowest levels of defoliation. Thus, the differences in damage intensity between Eastern and CentrallWestern regions may be smaller than hitherto believed. The existence of regional biases poses unanswered questions, in particular concerning the "reference tree".

One or several groups of teams of two surveyors assessed defoliation by 5% classes for about 25 trees for two well-represented species. %Cl3) 1100 (5, 20, 45 and 80 represent the middle values of defoliation classes 0, 1, 2 and 3 respectively). In each region, the team of trainers was used as the reference team. 2 Main Results and Interpretation The results in the mountainous regions for fIr, spruce, Scots pine and beech are summarised in Table 3. Detailed data are only given for two regional exercises with contrasting results (fIr in Lorraine, Fig.

2: 30--60%, Cl. 3: >60%, Cl. 4: dead discolouration Silviculture dead trees thinning 1983-86 in classes: Cl. 1 (normal) Cl. 2 (abnormal without rating) Cl. 3, 4, 5 (1-25%, 2tH>0%, > 60%) From 1987, classes: Cl. 0: 0--10%, Cl. 1: 15-25%, Cl. 2: 30--60%, Cl. ) Remain as dead trees in the sample None, except in young stands Replaced by randomly selected trees Normal Surveyors Trained foresters from various forestry management institutions in both networks Training By a small group (6 people) visiting all regions each year.

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L'Histoire de chaque jour, Tome 1 : Lise a souvent peur by Pierre Makyo


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