The current situation of worldwide concern over the emission of greenhouse gases and its effect on the climate demands an evaluation, from the perspective of energy efficiency and more specifically of non-renewable energy sources, of tendencies for change in the management of agricultural systems which have arisen in recent years.
In this context, Gloria I. Guzmán and Antonio M. Alonso, from the Research and Training Centre for Organic Farming and Rural Development of Granada (Spain) have evaluated the contribution of organic olive growing to the increase in the energy efficiency of Mediterranean agriculture, distinguished according to type of watering regime and intensiveness of cultivation. The research work has been supported by the European Commission, the Education and Science Ministry of Spain and the Innovation, Science and Enterprise Department of Andalusia Government.
The results show, on one side, the lower energy efficiency of irrigated land as opposed to dryland (i.e. non-irrigated) regardless of their style of management and, on the other, the greater non-renewable energy efficiency of organic olive growing in comparison with the conventional production. Nevertheless, organic management could still improve its energy efficiency if it further adjusts and internalizes the flows of nutrients needed in order to achieve greater sustainability.
Towards energetic self-sufficiency
Based on the categories analysed here, it could be concluded that the contribution of organic olive growing, especially on dryland, to NRE saving in Andalusia is considerable. Of the 42,148 hectares in existence at the end of 2006, between 60% and 65% are traditional dryland olive groves on steep Pedroches-style slope and 20% are traditional dryland olive groves on moderate Sierra Mágina or Granada-style slope. Only 6.4% of organic olive groves in Andalusia are on irrigated land. Those which remain to make up the 100% fall into other dryland categories which have not been taken into consideration in this study, as they are not representative of the overall situation.
Nevertheless, there is room for further improvement in the sustainability of organic olive growing through greater self sufficiency within the territory it occupies and, consequently, a lower rate of importation of energy flows originating from other ecosystems. The use of alperujo compost and temporary plant covers are strategies which do not involve extra land usage. This is a highly relevant point, since the need of organic projects to devote part of their farmland to generating the flows of nutrients and energy required to effectively reduce imports of organic material from other agro-ecosystems has on occasions been considered a drawback of organic production.
Antonio Marín Ruiz | alfa
Further reports about: > Andalusian organic olive growing > Mediterranean agriculture > agricultural systems > agro-ecosystems > energetic efficiency > energy efficiency > greenhouse gas > intensiveness of cultivation > non-renewable energy sources > renewable energy > soil preparation > style of management > traditional dryland olive groves > type of watering regime
New insight into why Pierce's disease is so deadly to grapevines
11.06.2018 | University of California - Davis
Where are Europe’s last primary forests?
29.05.2018 | Humboldt-Universität zu Berlin
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...
Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.
From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
18.06.2018 | Materials Sciences
18.06.2018 | Physics and Astronomy
15.06.2018 | Materials Sciences