Goa’s greatest agricultural advantage is not high productivity—it is that much of its farming landscape remains relatively intact ecologically. Unlike regions burdened by the ecological scars of intensive, chemical-heavy farming, Goa’s traditional landscapes maintain relatively low chemical input intensity. The state’s average fertiliser consumption stands at approximately 40 kg/ha, substantially below the national average.
This structural advantage is rooted in centuries of ecological wisdom preserved through traditional farming systems like puran sheti, kulagar arecanut plantations and resilient khazan land agriculture. Because these systems rely on localised recycling and natural nutrient cycles, they continue to function under relatively low external-input conditions.
This resource-conserving approach does more than protect the soil. These low-chemical farming environments create unique opportunities for agro-ecotourism and nature-based rural experiences. By preserving these traditional farming systems, we safeguard landscapes that serve as both productive agricultural zones and cultural assets, proving that community livelihood can coexist with nature conservation.
However, maintaining this advantage is not passive; it requires active stewardship before unsustainable input practices take root. The high ecological vulnerability of coastal ecosystems means that localised fertiliser excesses do not remain confined to the soil.
Imbalanced or excessive use of nitrogenous fertilisers disrupts this balance, contributing to soil acidification and declining soil biological health. This leads to nutrient leaching into fragile water systems and coastal saline khazans.
Preventing this runoff is essential for protecting sensitive estuarine fish habitats. Conserving these coastal waters preserves the balance of aquatic life and supports the ecological foundations on which local fishing livelihoods depend.
Achieving this requires a localised shift towards Integrated Nutrient Management (INM), which combines organic biological inputs with targeted and judicious fertiliser use. To translate this scientific framework into field-level practice, the ICAR–Central Coastal Agricultural Research Institute (ICAR-CCARI), Old Goa, has been conducting grassroots community engagement campaigns to assess regional nutrient management practices and identify local training needs.
These efforts are increasingly being reinforced through broader institutional and policy support aligning scientific research with public outreach.
In practice, the transition to a balanced nutrient model faces two major challenges: preventing resource degradation and scaling up nature-based alternatives.
The first challenge is the traditional practice of open-field residue burning. When crop residues and agricultural waste are burnt, recyclable organic matter and soil carbon are lost, while beneficial microbial activity and nutrient cycling are disrupted.
Moving away from burning towards on-site recycling is both an ecological and economic necessity. Converting plantation biomass such as areca husks, fronds and leaf sheaths into compost or vermicompost allows farmers to replenish soil organic carbon and fertility naturally. It also significantly reduces dependence on costly chemical inputs.
The second challenge is scaling up low-cost, on-farm alternatives to supplement nutrient requirements. Arecanut farmers can grow green manure crops such as ‘dhaincha’ and ‘mucuna’. These improve soil health by enhancing physical, chemical and biological properties while reducing weed growth and dependence on chemical fertilisers.
Similarly, integrating perennial green leaf manures like Gliricidia as border crops or live fencing offers an effective solution. Regular lopping and soil incorporation of this biomass enrich lateritic soils with organic carbon and recyclable nutrients. This mirrors traditional coastal practices such as the use of locally available ‘uski’ green leaf manure to improve crop yield and quality. By relying on farm-derived inputs, communities can lower cultivation costs while improving profitability.
To accelerate this waste-to-wealth transition, our team has contacted progressive local farmers and booked a specialised compost culture developed by the University of Agricultural and Horticultural Sciences, Shivamogga, for field demonstrations.
Farmers can also convert general farm waste into nutrient-rich organic fertiliser through vermicomposting. Regular application improves soil structure and water retention while reducing dependence on chemical fertilisers. This process speeds up
the decomposition of arecanut husk residue.
To be effective, these biological resources must be managed scientifically rather than by guesswork. ICAR-CCARI promotes soil-test-based management under the ‘4R Nutrient Stewardship Framework’, which emphasises the Right Source, Right Dose, Right Time and Right Place of nutrient application. Such precision-based nutrient management is increasingly supported by the online Fertilizer Calculator Goa platform, a mobile-friendly digital tool to help farmers eliminate over-fertilisation by estimating crop-specific nutrient requirements.
Nowhere is this balance better reflected than in the structural brilliance of the kulagar system. These traditional homesteads function as multi-tiered, microclimate-managed agroforestry units, integrating arecanut, black pepper, banana and spices under a dense protective canopy that conserves moisture and builds organic matter.
It is this low-external-input approach practised by Goan farmers that supports the superior quality of local produce.
Goa does not need major systemic restructuring; it needs protective evolution. By combining the traditional wisdom of kulagar and khazan farmers with data-driven nutrient management, Goa can emerge as a model for coastal agro-ecological sustainability. Ultimately, Goa’s long-term agricultural resilience may depend less on external chemical intensification and more on intelligently recycling the biological wealth already embedded within its landscapes—showing that the state’s true wealth lies in its soil.
(The writer is senior scientist at ICAR–Central Coastal Agricultural Research Institute, Old Goa)
