# Effects of fresh and fermented olive oil solid waste on nitrogen use efficiency in wheat: A dataset

## TL;DR

This study shows that fermented olive oil waste provides more usable nitrogen to wheat plants than fresh waste.

## Contribution

The study introduces new data on how fermentation improves nitrogen availability from olive oil waste in wheat cultivation.

## Key findings

- Fermented OSW had a nitrogen utilization coefficient of 50.15%, higher than fresh OSW at 35.36%.
- Fermentation enhances biodegradation, releasing more plant-available nitrogen.

## Abstract

Olive Oil Solid Waste (OSW) is a valuable agricultural by-product that can be used as a source of organic matter and nutrients for crops. However, the efficiency of OSW in providing nitrogen to plants depends on its decomposition rate and how nitrogen is available. Here, we investigated the nitrogen utilization coefficient (NUC) from fresh and fermented OSW added to calcareous soil planted with durum wheat (Triticum durum cv Sham 3). Our data showed that the NUC of fermented OSW was significantly higher than that of fresh OSW, with values of 50.15 % and 35.36 %, respectively. This difference was attributed to the enhanced biodegradation of fermented OSW, which resulted in the release of more nitrogen in a form that was readily available for plants.