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Soil Drainage
Water is essential for plant growth. However, either too little or too much water can result in decline and death of plants. For this reason, internal drainage characteristics of soils are possibly the one biggest factor that will determine which types of plants will grow on a particular landscape site. When soils retain too much water, or restrict water movement through them, the result can be root suffocation, root disease, and eventual root death.
On somewhat poorly drained sites plants may not die. but instead show chronic decline symptoms associated with root loss. These symptoms may include yellowing of leaves (chlorosis), defoliation, marginal scorching, dwarfed foliage, and dieback. Trees and shrubs experiencing root decline from excess water are also more susceptible to attack and invasion by secondary diseases and insects.
In addition to water, soil must contain air, or more precisely, oxygen. Roots absorb oxygen out of the soil and expel carbon dioxide into the soil in their normal process of respiration. This is done in spaces between soil particles called pores, which are not filled with water. Without this normal exchange of gases • carbon dioxide builds up; oxygen is less available so roots die.
For more information on your plant health or to schedule an appointment for a complimentary consultation with me, call 877-BARTLETT today, or email me at jwood@bartlett.com.
BARTLETT
TREE EXPERTS
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