A park is cultivated mostly with pine trees and irrigated by drip irrigation system. Every year about 0.25 % of the trees are dying ,what are the soil properties to be studied to know the effect of soil on the dying of trees?
Adverse climatic conditions and disease could also be the reason behind mortality of pine trees.
Agree with Dr Singh. However dought if there is a significant problem. Mortality of 0.25% is equivalent to 25 trees in 10,000. Some degree of natural selection loss due to overcrowding or other loss may occur. If mortality is 25%, yes a reason should be investigated. If trees are recently planted, some mortality is common.
If i have understood your question correctly, climate change -related issues are most predominat in such cases. Please analyse the current change in climate , you will surely get back the appropriate answer. If these pine trees are naturally grown , lets analyse the changes in soil microbial diversity , soil acidity , loss of fertile top soil, and lastly the biomass production , try to see, if any relation comes out...i am sure you will get some clues...unless the trees are recently planted, William has rightly pinpointed.
Than you,the trees are planted recently .There are numbers of tree died every year in some zones, if iwant to study the soil factors what soil tests i should make in these zones?
Regards
If this is the case, please look into the initial health of the planting material and the re-planting sites( it could be allelopathic effect of previous cycle ) ,besides climatic factors as well..
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