Healthy soil is the foundation of agriculture. It stores water, supplies nutrients, supports billions of microorganisms, anchors plants, and ultimately determines how productive a farm can be. But in many cotton-growing regions, years of intensive cultivation, soil erosion, nutrient depletion, and other pressures have reduced soil fertility and made farming more difficult.
Cotton farmers are finding ways to reverse that trend.
Growers all over the world are using inexpensive regenerative practices to transform agricultural waste into valuable soil amendments, restore biological activity, improve water retention, and increase productivity.
Three techniques in particular — biochar, bokashi, and Jeevamrit — demonstrate how farmers can combine traditional knowledge with modern agricultural science to rebuild the soil beneath their feet.
Turning Cotton Stalks into Biochar
After cotton is harvested, farmers are left with stalks and other crop residues.
Those materials are often treated as waste. They may be burned, discarded, or simply left behind.
But cotton stalks contain carbon captured by the plant while it was growing, which means they can become a valuable resource.
Biochar is a stable, carbon-rich material produced by heating plant matter under conditions with limited oxygen. When added to soil, biochar can improve its physical structure, help retain water and nutrients, and provide habitat for beneficial microorganisms.
It can also keep carbon stored in the soil for long periods.
For cotton farmers, that creates an opportunity to turn something they already have — crop residue — into something they need: healthier soil.
Making Biochar Accessible
Biochar is not a new idea.
For centuries, Indigenous communities in the Amazon used charcoal and organic material to create extraordinarily fertile soils known as terra preta, or “dark earth.”
Modern biochar production often involves specialized equipment, however, putting the technology beyond the reach of many smallholder farmers.
ICAC scientists developed a much simpler approach: the open-earth cone-pit method.
Instead of requiring expensive machinery, farmers can create biochar using a properly shaped pit dug directly into the ground. Cotton stalks and other dry crop residues are burned under controlled, low-oxygen conditions, producing biochar that can then be incorporated into the soil.
The method is inexpensive, scalable, and designed specifically for farmers who may have limited access to equipment or capital.
Agricultural waste becomes a valuable farm input.
From “Waste” to Healthier Soil
Once incorporated into the field, biochar can deliver several benefits.
Its porous structure can help soil retain moisture and nutrients while improving aeration and providing habitat for microorganisms.
Those characteristics can be particularly valuable in degraded or highly acidic soils.
Fieldwork conducted by the ICAC in Zambia demonstrated the potential. In areas where poor, acidic soils had constrained cotton production, applications of cotton-stalk biochar produced dramatic improvements. Cotton yields in some demonstration plots more than doubled.
At the same time, farmers found a productive use for crop residues that might otherwise have been burned or discarded.
It is a simple example of circular agriculture: the remains of one crop help create the conditions for the next.
Biochar Is Only Part of the Solution
Healthy soil is not simply a physical material.
It is alive.
A small amount of productive soil can contain an extraordinary community of bacteria, fungi, and other microorganisms. These organisms break down organic matter, make nutrients available to plants, contribute to soil structure, and interact with plant roots.
That is why regenerative agriculture combines biochar with techniques designed to restore biological activity.
Two of those techniques are bokashi and Jeevamrit.
Bokashi: Turning Organic Waste into Fertility
Bokashi is a fermentation-based composting technique with roots in Japan.
Farmers can make it from readily available organic materials such as crop residues, weeds, food waste, molasses, and other ingredients. Beneficial microorganisms ferment the mixture, creating a nutrient-rich soil amendment relatively quickly.
When combined with biochar, bokashi provides nutrients and biological activity while the porous biochar helps create an environment in which microorganisms can thrive.
The two materials complement each other.
Biochar helps improve the soil’s physical characteristics. Bokashi helps feed the biological processes taking place within it.
Together, they can help transform depleted soil into a more active and productive growing environment.
Jeevamrit: Giving Soil a Microbial Boost
Jeevamrit comes from traditional Indian agriculture.
It is a fermented microbial preparation made from materials that are commonly available in rural farming communities, including cow dung, cow urine, molasses, pulse flour, soil, and water.
Rather than functioning primarily as a fertilizer, Jeevamrit is intended to stimulate biological activity.
When applied to fields, it introduces and feeds microorganisms involved in decomposition and nutrient cycling. Those organisms can help convert nutrients already present in the soil and organic matter into forms plants can use.
In simple terms, the goal is not merely to feed the plant.
It is to feed the soil.
Three Techniques Working Together
Biochar, bokashi, and Jeevamrit perform different functions, which is why they can be particularly effective when used together.
Biochar provides a stable, porous structure that can retain moisture and nutrients and create habitat for microorganisms.
Bokashi contributes fermented organic matter, nutrients, and microbial activity.
Jeevamrit helps stimulate the living biological system within the soil.
Together, they represent a different approach to agricultural productivity: rather than relying solely on inputs applied to each new crop, farmers work to rebuild the underlying health and fertility of the land itself.
Over time, healthier soil can improve root development, water retention, nutrient availability, and resilience to difficult growing conditions.
Farmers Teaching Farmers
One of the most promising aspects of the program is how quickly knowledge can spread.
With support from organizations including GIZ, the International Trade Centre, CottonConnect, and other partners, the ICAC has provided training to farmers, extension workers, and agricultural professionals in countries including Zambia, Côte d’Ivoire, Burkina Faso, India, Bangladesh, Tanzania, and Uzbekistan.
But formal training is only the beginning.
Farmers demonstrate the techniques to other farmers. Extension workers bring them to new villages. Demonstration plots allow communities to see the results firsthand. Mobile phones and messaging groups allow growers to exchange pictures, experiences, and advice.
That farmer-to-farmer model can turn a successful experiment into a practice adopted across an entire region.
Low-Cost Solutions Matter
Many agricultural technologies can improve productivity, but they are not always affordable or practical for smallholder farmers.
That is what makes these approaches especially promising.
Cotton stalks are already available after harvest. The materials needed to produce bokashi and Jeevamrit can often be sourced locally. An open-earth biochar pit requires no sophisticated machinery.
This reduces farmers’ dependence on products that must be purchased and transported to their farms.
Where these techniques are appropriate and properly managed, farmers can use locally available resources to improve the productive capacity of their own land.
For a smallholder farmer operating on narrow margins, that distinction can be enormously important.
Improving Resilience
Healthy soil becomes even more valuable as farmers confront a changing climate.
Soils with better structure and more organic matter can absorb water more effectively and retain moisture for longer periods. Stronger root systems can help plants withstand periods of water stress. Better nutrient cycling can support healthier and more consistent crop development.
None of these practices can eliminate drought, extreme heat, flooding, or other climate risks.
But they can help create farms that are better able to cope with them.
That means soil health is not only about increasing today’s yield. It is about protecting tomorrow’s harvest.
Storing Carbon Beneath Our Feet
Biochar also creates an interesting opportunity for carbon management.
Cotton plants absorb carbon dioxide from the atmosphere as they grow. Normally, much of the carbon stored in plant residues eventually returns to the atmosphere as the material decomposes or burns.
Converting that biomass into biochar changes the equation.
The biochar process converts part of the plant’s carbon into a much more stable form that can remain in soil for years or even decades.
The same material can therefore perform two functions: improving agricultural soil while keeping carbon stored underground for much longer than ordinary crop residue would.
Researchers continue to study how biochar can best be produced and used under different soils and climates, but its combination of agricultural and carbon benefits has made it an important area of interest in regenerative farming.
Waste Is a Resource in the Wrong Place
Perhaps the most important lesson is also the simplest.
Cotton farming produces more than lint and seed. It produces biomass — stalks, leaves, roots, and other organic material.
What happens to those materials matters.
Instead of seeing crop residues simply as waste, regenerative agriculture asks whether they can become resources for the next growing cycle.
A cotton stalk can become biochar.
Organic waste can become bokashi.
Locally available materials can become Jeevamrit.
And depleted soil can begin to become productive soil again.
Growing Cotton by Growing Better Soil
Sustainable agriculture is ultimately about producing what people need today without diminishing the resources farmers will need tomorrow.
Few resources are more important than soil.
ICAC’s work with biochar, bokashi, Jeevamrit, and other regenerative techniques demonstrates that improving soil does not always require expensive technology or complicated solutions.
Sometimes it begins with resources farmers already have, knowledge that can be shared from one farmer to another, and a different way of looking at what was once considered waste.
Cotton grows from the soil. By helping farmers
restore that soil, cotton can also help give something back.