In early 2019, Chalmers University of Technology, Sweden, published an interesting study related to the effects of organic agriculture on the Earth’s climate. Stefan Wirsenius, Professor of environmental sciences who wrote the study concluded that organic food production has a worse impact on the climate as compared to conventional farming methods. Summary of the thesis published in Ekologisk news mat ärsämreförklimatet by chalmers. seon 8th January, 2019.
The approach is based on the argument that organic food requires a larger area of land, so it contributes more to deforestation. The data source was statistics on total production in Sweden — yields per hectare for organic versus conventional agriculture for 2013-2015.
Findings in Sweden showed that yields from organic foodper hectare were much lower – mainly because there was no fertilizer used. Thus, a much larger area of land was needed to produce organic food with the same amount of that produced by conventional method.
Until now, it is still a problem formulation for environmental experts and observers regarding what systems are suitable for developing sustainable global agriculture. It is due to the number of human populations continues to grow as a geometric progression, while the growth of food resources for consumption moves slowly following the arithmetical count.
Is it true that the organic farming system is no more sustainable than conventional farming system? Certainly it is not enough to conclude from one sample in an area. Even the different methods used in a system that want to be applied in the same area can show different results.
Simply put, the essence of organic farming emphasizes locality or the use of surrounding resources to grow plants – not dependent on industrial chemicals that help agricultural production. Then the problem is that there are certainly different and highly diverse local resources in each region.
There are areas with local resources that are sufficient to replace chemical fertilizers and pesticides. However, there are also areas with very little local resources. It is not that simple, every local resource available must further be tested for its compatibility with local land. Whether or not organic farming is successful depends on it.
Several things needed are water resistance testing, comparison of soil texture, observation of the development of land ecosystems, and how toself-produce vegetable extracts from local resources for pest repellant.
December 2018 ago, in an activity covering the organic rice harvest in Sumpur Kudus Sub-District, Sijunjung Regency, West Sumatra, Indonesia, I found facts that were contrary to the Wirsenius Thesis that we discussed earlier. Through organic farming system, farmers in Sumpur Kudus could produce 7.7 tons of rice per hectare. Previously, through fertilization and spraying methods, farmers in Sumpur Kudus produced 4 tons of rice per hectare. Their production costs were reduced and organic rice could be sold at a higher value than the price of common rice.
These results were obtained after conducting a compatibility test between the local resources and local land. A group of organic rice farmers in Sumpur Kudus found that unburnt straw was the most powerful material in maintaining water sustainability for their rice fields. Meanwhile, the highest nutrient content was found in a mixture of rice mud with cow dung. To repel pests, they replaced pesticides with papaya leaf extract.
Rice is only one example of various types of plants that can be applied to organic farming system. But the point is whether local resources are sufficient and suitable to support the agriculture. We can get different yields in one hectare of land if we use different local materials to support agriculture.
Another experience was found by Verena Seufert and Navin Ramankutty, both of whom are geography professors from the University of British Columbia. They conducted a study on the application of organic agriculture in North America, Europe and India. In an article entitled “Organic Farming Matters, Just Not In The Way You Think”, the researchers found that organic farming was up to 35% more profitable than conventional farming. In a number of regions, organic agriculture provides more rural employment opportunities because organic management is more labor intensive than conventional practice. In terms of health, the biggest advantage is that organic system can reduce exposure to toxic agrochemicals.