Evaluation of the effects of short-term amendment with olive mill pomace on some soil properties
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Date
2022-01-30
Authors
Journal Title
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Publisher
SOIL SCIENCE ANNUAL
Abstract
The extraction of olive oil produces an enormous quantity of waste, such as olive mill wastewater
(OMWW) and olive mill pomace (OMP), The majority of the agricultural wastes, including olive oil
mill waste, are used as soil amendments due to their high nutritional value. The purpose of this
study was to investigate the effects of the amendment with olive mill pomace from a 3-phase coldpressed
system on the characteristics
of the soil pH, electrical conductivity (EC), and organic matter
content
(OM). The experiment was carried out using increasing rates
of olive mill pomace (12.5%,
25%,
50%, 75%, and 100% w/w) plus the control untreated soil in microcosms under laboratory
conditions.
The results showed that the treatment of soil with olive mill pomace has a signifi
cant effect
on
soil properties (pH, EC, OM, OC, and CaCO
) soil pH was decreased under OMP treatment, especially
with high doses of PR4 and PR5, and the electrical conductivity of the soil (EC) was increased,
as
well as soil carbonate content. Moreover, the soil organic matter content and soil organic carbon
content
were highly increased under the treatment with OMP.
As a result, we can consider the
olive
mill pomace as a soil fertilizer. Pretreatment of olive mill pomace to reduce acidic pH and salt
content
before use as a soil amendment is also recommended.
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