
Sustainable management of surplus paddy residue in the Indo-Gangetic plain is a back-breaking task for farmers due to lack of viable options. Eventually, farmers prefer to incinerate it mindlessly. Sustainable residue management is important because paddy straws are rich in nutrients and can be translated into value added products.
The paper by Asik Dutta et al ‘A state-of-the-art review in crop residue burning in India: Previous knowledge, present circumstances and future strategies’ tries to find the fundamental causes behind this illicit practice and mark the harmful effects of residue burning on ecosystem. It also deciphers in depth strategies, environmental laws, socio-economic policy frameworks and future thrusts which would offer multifaceted avenues for the sustainable management of crop residues.
Residue burning is highly pernicious for the environment and human health. In India, the National Green Tribunal (NGT) strictly opposes this practice of crop residue burning, particularly in North-Western India, and both the central and state governments have implemented various policies to help farmers with eco-friendly straw management approaches.
The major factors are labour shortage at critical time of field operation, very short span or window for preparation of the field for the next crop, lack of processing facilities and large-scale use of combine harvester for harvesting of paddy. Although, other minor factors also play crucial roles and aggravate the situation further.
Both public and private organisations are trying to find out in- situ (adaptation of conservation agriculture and use of Happy Turbo Seeder (HTS) and ex-situ management options (livestock feed, production of biofuels and biochar, electricity generation, mushroom farming, preparation of compost and packaging materials) to fix the issue.
Losses of essential nutrients from the soil and in the residue, along with the emission of potential greenhouse gases (GHGs), are the major repercussions of this malpractice. Adaption and commercialization of resource conservation technologies like conservation agriculture with low silica content in rice varieties are excellent opportunities to look after. Value addition by the preparation of compost, mushroom production, biogas/oil generation, and producing energy in power plants are new avenues to convert this waste into wealth.
The major setback of poor implementation is a lack of attention from policymakers and public authorities. Although, in recent years, different organisations have been coming forward to solve the issue and hope that combined approaches from multiple disciplines could be able to cope with the problem soon.
Respective state and central governments, along with different private organisations, are working hand in hand to spread awareness and control stubble burning. Fostering the current technologies through policy interventions and organising training camps in the village level with monetary incentives are the important strategies to look for.
Development and fostering custom hiring system and rent based machinery utilisation pattern in the farming community. Most of the small and marginal farmers are unable to bear the cost of modern machinery. So, if there is creation of some rent-based system that would create employment opportunities along with solve residue collection problem. Co-operative mode for using machinery is also another viable option.
Monetary support is another option for spreading the usefulness of stubble burning. Monetary support can be given in two ways (a) Incentivizing the farmers who will stay away from burning (b) Giving financial help to the farmers so, they can afford Happy Turbo Seeder and other heavy machinery important for sowing and residue management.
Every year, centre as well as state governments are spending billions of rupees to find a permanent solution against this hitch. Multi-faceted factors (operational, socio-economic and technical) are behind this. Diverse on-farm and off-farm the benefits can change the picture. Apart from on-farm utilisation in conservation agriculture-based systems; the surplus residue can be efficiently employed for production of biofuel, biogas, biochar and electricity, growing mushroom, pulp and paper board industry and in domestic purposes.
Imposing strict laws and legal action without fulfilling the need of the farming community is ineffectual. In this review, along with different descriptive measures, policy issues and future research niches are distinctly discussed. Disseminating these technologies in the rural areas with full-fledged government support could stop the issue in the north-western states.
The full paper can be accessed here