This means of re-utilization can help to improve soil fertility in olive oil farms which are characterized by low organic matter, reduce the cost of inorganic fertilizes or, for a commercial enterprise, can provide an additional source of revenue for the olive oil mill economy.
As a study shown, olive orchard soils, after 17 years of using OMP co-compost, are higher quality than those are not using any co-compost. There are many organic matters that are significantly increased in soils using as organic amendment, like total organic C, total nitrogen, available phosphorus, etc. In carbonated and silicic soils, resistant pool of organic matters are enhanced six and eight fold or so, respectively. What’s more, some enzyme activities, linked to C and P cycling, are increased in amended silicic soils ( β-glucosidase twenty-five fold higher and phosphatase seven fold higher ). In particular, organic OMP co-compost application and management makes high organic matter mineralization. The application OMP co-compost is also key point for increasing long-term C stability in soil.
We can say that using OMP co-compost that is one of olive mill by-product is a recycling and promising option, which is environment-friendly and important for long-term agricultural benefits. Therefore, it is an attractive alternative for OMP management in the Mediterranean regions.