ISA Arborist Chapter 1 -chapter 5 |Complete Bundle

Abscission Zone CORRECT ANSWER Area at the base of the petiole where cellular break down leads to leaf and fruit drop. Absorbing root CORRECT ANSWER Fine, fibrous roots that take up water and minerals. Most absorbing roots are within the top 12 inches (30cm) of soil. Adventitious bud CORRECT A...

Actinomycete CORRECT ANSWER Group of soil bacteria resembling fungi. Actinomycetes play a role in the decomposition of organic matter and the release of mineral elements. Aggregate CORRECT ANSWER Close cluster or mix of small particles of soil and or organic matter of varying sizes that bond toge...

Cation exchange capacity CORRECT ANSWER Ability of the soil to absorb and hold cations. Affected by soil ph. Measures soil fertility, clay composition and engineering characteristics. Chelate CORRECT ANSWER Chemical compound that keeps plant nutrients [usually iron(Fe)] soluble and available for ...

Antitranspirant CORRECT ANSWER Substance applied to the foliage of plants to reduce water loss (transpiration). Available water CORRECT ANSWER Water remaining in the soil after gravitational water has drained and before the permanent wilting point has been reached. Desiccation CORRECT ANSWER S...