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
Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State
How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy