Prong 1- Revival of Traditional Ecological Knowledge Based Farming Systems: Traditional Knowledge through the Lens of Modern Scientific Research (Part II)
Julia Köningera*, Jasper Matthiessenb*, Mrinalini Kochupillaic, Prabhakar Raod#
Traditional Knowledge Meets Modern Science
After decades of focusing on chemical intensive, uniform/standardized farming, the modern understanding of efficient and sustainable farming is presently shifting away from artificial fertilizer and pesticide driven monoculture towards more traditional methods and practices of cultivation. Commonly known among these, are practices of mulching, low tillage, small-scale rainwater harvesting, crop rotation, inter-cropping, multiple cropping and working with the soil microbiome. Many of these practices have been documented in the ancient texts of India, Vedic- (Rigveda, Atharvaveda) and Ayurvedic texts (Charaka Samhita, Sushruta Samhita), dating back to 3000 BC – 1000 BC.
More recent studies and developments help to scientifically understand, appreciate and improve upon these ancient practices for modern application. This has led to a growing movement of returning to traditional and natural farming methods in India.
Traditional farming uses several natural bio-stimulants and bio-pest-repellent formulations, which are simple to produce on site (at the farm), using local materials and resources, such as cow dung and urine and diverse local plants. Some preparations that are commonly used in Zero Budget / Natural Farming, for example, include:
|Name of agent||Principal contents||Use case|
|Water, cow dung & cow urine from local breeds||Seed germination enhancer|
|Water, cow dung & cow urine, raw sugar, legume flour, soil||Plant Bio-stimulant|
|3||Ghanjeev-Amrut||Water, cow dung & cow urine, raw sugar, legume flour, soil||Plant Bio-stimulant concentrate with longer shelf life|
|4||Neem-astra||Water, neem leaves, cow dung, cow urine||Pest repellant / Plant immune-strenghtener|
|5||Brahm-astra||Neem leaves, custard apple leaves,
Guava leaves, caster leaves, papaya leaves, pomegranate leaves, cow urine, weeds that are pest resistant
|Pest repellant / Plant immune-strenghtener|
|6||Agni-astra||Tobacco leaves, green chilli, garlic, neem leaves, cow urine||Pest repellant / Plant immune-strenghtener|
|7||Garbage enzyme||Kitchen / yard waste, raw sugar, water||Plant Bio-stimulant / Bio pest repellant|
Additional to these products, several processes are used, such as hot composting, mulching, crop rotation, inter-cropping, multiple cropping and low tillage, all of which are already well known and documented. In Europe, for example, these practices are mostly applied in organic farming.
Any substance or microorganism that are applied to plants to enhance the efficiency of nutrients are called biostimulants. Such plant biostimulants include preparations composed of organic matter, minerals (such as rock-flour), and microorganisms. Biostimulants foster the fertility of the soil-microbiome and consequently, the plant growth and development is improved (facilitated plant metabolism, nutrient assimilation, translocation; water is rendered more efficiently). Since biostimulants foster the tolerance against abiotic stress and increase the natural resistance to pests, they contribute to better yields and crop quality. Preparations that act like microbial plant biostimulants gain popularity among Indian farmers (such as those practicing zero budget or natural farming). These preparations include Beejamrut, Jeev-Amrut and Ghanjeev-Amrut, which are very close to the ancient formulation of Panchagavya (Sanskrit: five products of the cow) which is composed of cow dung, cow urine, milk, curd and clarified butter. Ananda C. (2011) and Chadha et al. (2012) demonstrated the positive effects of these traditional microbial fertilizers. Ananda C. (2011) reported similar increase of plant yield when comparing Panchagavya to NPK chemical fertilizer. However, while the chemical NPK fertilizer reduced microbial populations in the soil, Panchagavya increased them, pointing out a possible difference in sustainability for these two approaches. Manjunatha et al. (2009) found significant increases in yield of sunflower seeds using the Jeev-Amrut preparation. Chadha et al. (2012) also reported significant increase in yields when using these traditional preparations, and also reported their effectivity in controlling several plant pathogens.
Chemical analysis of these preparations done by Chadha et al. (2012) also showed presence of bio-available Nitrogen, Phosphorus and Potassium, as well as the presence of several trace elements (S, Ca, Mg, Fe, Mn, Zn, Cu). Timmusk et al. (2017) summarizes the effectivity of employing Plant Growth Promoting Bacteria (PGPB) and Rhizobacteria (PGPR) and concludes that the potential of such formulations can be brought to wider field application by further systematic studies and standardization. Mauchline et al. (2017) come to a similar conclusion in their study of the soil microbiome and particularly the interplay of Pseudomonas and the wheat rhizosphere, stating that: “a better understanding of the soil microbiota, combined with smart manipulation of plant cropping systems may present a reliable future route to sustainable yield improvement and biocontrol.” There is ample, current research on plant microbe interaction and the soil microbiome regarding agricultural application, all lauding the promise of microbe powered sustainable agriculture.
Any natural farming method or agricultural model that aims to be economically sound and sustainable, to preserve and enhance biodiversity and thus increase the resilience of an ecosystem while using minimal or zero external input of nutrients or synthetic pesticides, requires local varieties of crops to succeed. Such varieties are already adapted to their environment over an extended time span and often display high resilience to biotic and abiotic stress present in that environment. Hence, the vitality of seeds of local crop varieties is essential. Bheej-Amrut is a seed-stimulant preparation among the TEK bio-stimulants from India, which seems to be an excellent aid in such seed-keeping efforts. Bheej-Amrut is typically composed of water, cow dung, cow urine, limestone and local soil and hence easy to produce on site. Devakumar (2014) found Bheej-Amrut to contain N-fixing, P-solubilizing bacteria, actinomycetes and fungi. Souman et al. (2009) also reports the presence of indole acetic acid (IAA) and gibberellic acid (GA) producing bacteria in Bheej-Amrut. Furthermore, Bheej-Amrut-treated seeds show an increased germination rate and seedling length. These findings suggest that Bheej-Amrut may be a suitable preparation to aid in local, farm-scale seed keeping and the revival of local crop varieties.
Another microbial preparation, commonly called “garbage enzyme”, is produced by fermenting household or industrial fruit and vegetable peels and scraps. Its production is simple and low cost. The garbage enzyme preparation is associated with increased solubilization of Phosphorus from solid deposits. The efficacy of soluble and mineral Phosphorus enrichment of soils by microbes has been described by Sharma et al. (2013), which points out how garbage enzyme could benefit plant vitality and yields in agriculture. Other documented use of garbage enzyme includes the treatment of synthetic greywater, and waste activated sludge. In both use cases, the results point toward increased solubilization of solids from the substrate, which in turn may facilitate bacterial treatment and use of these waste materials as bio-resources.
Other well-documented processes employed in traditional agriculture, and increasingly validated by modern science, include mulching and low tillage, which have been demonstrated to improve several soil properties considered crucial for productive agricultural use. Xiao-Yan Li et al. (2001) found increases of corn grain yield of 20 – 95 % by mulching, depending on the availability of water: the dryer the year, the greater the improvement of grain yield. Low tillage is a practice that is gaining more and more attention in the sustainable farming context and its efficacy has been shown in several studies. Hot composting (Berkeley composting) is also used in SSNF as a simple and low-cost method to fully utilize all excess biomass available and rapidly convert it into a versatile bio stimulant for use in agriculture.
The state of current research as outlined above, strongly underlines the promise of traditional sustainable farming methods, and makes a clear case for the revival of TEK based farming systems, and employing, where relevant both ancient and modern techniques and processes together.
The question that arises, of course, is how one can concretely go about reviving and introducing TEK based farming systems into mainstream agriculture. Here, the SSI 1.0 working groups emphasized the relevance of (re)education through diverse channels – both formal and informal. Informal efforts through NGOs and spiritual leaders of India is ongoing. More formal efforts at regulation and policy level are, however, also necessary.
In this context, it is noteworthy that despite the importance of TEK based farming systems and its ability to spur farmer level innovations (as seen also in Jitul Saikia’s story) and enhance environmental health, current intellectual property rights regimes are neither equipped nor appropriate to protect innovations (including seed innovations) emerging from the practice of TEK based farming systems. Although the Indian PPV&FR Act recognized farmers’ rights, and permits the registration of extant varieties (including farmers’ varieties), such varieties still have to comply with the definition of variety under the PPV&FR Act and are permitted only a few more ‘off types’ than breeders’ varieties. Undoubtedly, the Indian law also recognizes and rewards seed conservers under their Plant Genome Savior awards (awarded to individual farmers as well as farmer communities). Yet, the number of awards as well as the fact that these are one-time awards make limit their effectiveness as tools to promote and incentivize sustainable seed innovations. Revisions in educational curriculums, agricultural extension services curriculums as well as technical solutions can aid legal and policy measures aimed at promoting the adoption of TEK based farming systems such as ZBNF. We discuss these measures in Prong 2 and Prong 3 of our SSI 2.0 project and position paper.
Please click here to view Part I of this two-part post and here to view the version of the post with full references.