Ratoon Cropping Guide: Sugarcane, Sorghum, and Rice Methods

Ratoon cropping is an ancient agricultural practice that allows farmers to harvest multiple times from a single planting. This method involves raising a new crop from the stubble or roots left in the soil after the main crop has been harvested. Ratooning is widely used in crops like sugarcane, sorghum, and rice. It offers a unique opportunity to reduce cultivation costs, as it eliminates the need for fresh land preparation and seed purchases. However, successful ratoon management requires specific agronomic practices to overcome challenges such as soil nutrient depletion and pest carryover. Understanding the balance between cost savings and potential yield declines is key to maximizing the profitability of ratoon crops.

Sugarcane is the primary crop where ratooning is practiced on a commercial scale in India. Most sugarcane farmers take at least one or two ratoon crops after the plant crop. Sorghum and rice are also suitable for ratooning, particularly in regions with limited growing seasons or where water is scarce for a second planting. The success of a ratoon crop depends heavily on the health of the main crop at harvest. If the main crop was diseased or poorly managed, the ratoon crop is likely to perform poorly. Therefore, ratoon management actually begins during the cultivation of the main crop, ensuring that the root system remains healthy and free from soil-borne pathogens.

Benefits of Ratooning

The primary benefit of ratoon cropping is the significant reduction in production costs. Because the crop is established from existing stubble, farmers save on the cost of seed material, which can be a major expense in crops like sugarcane. In addition to this, there is no need for deep plowing, harrowing, or field leveling, which reduces tractor usage and saves diesel. This lower initial investment makes ratoon cropping highly attractive to small and marginal farmers who operate on tight budgets. The reduction in land preparation also saves time, allowing the crop cycle to continue without the delays associated with replanting.

Ratoon crops also have a shorter maturity period compared to the main crop. Since the root system is already established, the plant bypasses the early germination and establishment phases, growing rapidly from the start. In sugarcane, a ratoon crop may mature one to two months earlier than the plant crop. This shorter duration allows farmers to free up their fields earlier, facilitating timely sowing of subsequent crops in the rotation. The established root system also allows the ratoon crop to absorb water and nutrients from deeper soil layers immediately, making it more resilient to early-season dry spells.

Challenges and Risks

Despite the cost benefits, ratoon cropping comes with substantial challenges. The most significant risk is the progressive decline in yield with each subsequent ratoon cycle. Ratooning yields are typically lower than the main crop, and carrying over ratoons beyond one to two cycles is generally not recommended due to pest accumulation. Over time, the physical damage to stubbles during harvesting and the aging of the root system lead to poor sprouting and uneven plant populations. Soil compaction from harvesting machinery also restricts root growth, further reducing the yield potential of subsequent ratoon crops.

Pest and disease carryover is another major concern in ratoon cropping. Insects like stem borers, root grubs, and scale insects, as well as fungal pathogens responsible for diseases like red rot in sugarcane, can easily survive in the stubble and infect the new growth. Because there is no break in the crop cycle, these pest populations can build up to damaging levels. Soil nutrient depletion is also accelerated, as the ratoon crop draws nutrients from the same root zone without the soil-stirring benefits of tillage. This requires careful fertilizer management to maintain soil health.

Soil Moisture at Harvest

The success of the ratoon crop is highly dependent on the soil moisture level at the time of harvesting the main crop. If the field is too dry during harvest, the stubbles can suffer from dehydration, which kills the buds and prevents sprouting. Conversely, if the field is waterlogged, the stubbles may rot, leading to poor crop stands. The ideal soil moisture at harvest should be just enough to support clean cutting without pulling the roots out of the soil. Managing irrigation before harvest is thus critical to prepare the soil for the ratoon phase.

After harvest, light irrigation should be applied immediately to stimulate the dormant buds. If irrigation is delayed, the buds may remain dormant or dry out under hot sun. Proper drainage must also be maintained to prevent water from standing in the field, as young sprouts are highly sensitive to waterlogging. Farmers must balance irrigation based on soil type and weather conditions, ensuring that the stubbles have a moist, aerated environment to sprout uniformly.

Sprouting and Bud Dynamics

The regeneration of a ratoon crop depends on the sprouting of dormant buds on the underground stubble. In sugarcane, these buds are located at the nodes below the soil surface. Sprouting is influenced by environmental factors such as soil temperature, moisture, and aeration. A soil temperature of twenty-five to thirty degrees Celsius is ideal for rapid sprouting. If harvesting is done during peak winter, low soil temperatures can delay sprouting, resulting in a gappy stand that requires gap filling to maintain plant population.

Hormonal balance within the stubble also regulates bud sprouting. The removal of the main stalk eliminates apical dominance, triggering the growth of lateral buds. However, if the main crop was harvested using dull blades, the shattered stubble can restrict hormone movement and encourage pathogens. Using sharp harvesting tools and spraying growth regulators like gibberellic acid, as recommended by KVK scientists, can help improve sprouting percentage and encourage early tiller development.

Nutrient Transport in Stubble

During the initial weeks of ratoon growth, the developing sprouts rely entirely on the nutrient and carbohydrate reserves stored in the underground stubble. Starch reserves in the roots are converted to soluble sugars, which travel upward to feed the emerging shoots until they develop their own leaves and roots. If the main crop was harvested prematurely or suffered from nutrient deficiencies, these reserves will be low, leading to weak ratoon sprouts. Ensuring good nutrition in the plant crop is therefore essential for ratoon success.

As the ratoon sprouts grow, they require rapid nutrient uptake to support cell division and tillering. Early fertilization is necessary to supplement the stubble reserves. Nitrogen, in particular, should be applied as soon as the buds begin to sprout, as it is the primary building block for leaf and stem growth. Delayed nitrogen application can restrict tiller production and reduce the final stalk count, which is a major factor in sugarcane and sorghum yield. Farmers should follow Soil Health Card guidelines to determine the correct fertilization timing.

Stubble Shaving and Off-barring

Stubble shaving is a critical management practice in sugarcane ratooning. After the main crop is harvested, the remaining stubbles are cut close to the ground level, usually within two to three centimeters. This is done manually using sharp spades or mechanically using tractor-operated stubble shavers. Shaving removes the dry, damaged upper portions of the stubble and encourages the lower, underground buds to sprout. These lower buds produce deeper and stronger roots, which are essential for supporting the tall sugarcane stalks and absorbing nutrients from deeper soil layers.

Off-barring is another important tillage operation carried out in ratoon fields. It involves cutting the roots on either side of the stubble row using a disc plow or a specialized cultivator. This operation serves multiple purposes. First, it prunes the old, inactive root system, encouraging the plant to develop fresh, active feeder roots. Second, it loosens the compacted soil near the stubble row, improving aeration and water infiltration. Off-barring also facilitates the placement of fertilizers close to the root zone, ensuring efficient nutrient uptake. This operation should be performed carefully to avoid dislodging the stubbles.

Trash Mulching and Nutrition

Sugarcane harvesting generates a large amount of crop residue, known as trash. Instead of burning this trash, which causes air pollution and destroys soil organic matter, farmers are encouraged to practice trash mulching. This involves spreading the trash evenly in the inter-row spaces of the ratoon crop. The trash mulch acts as a protective barrier, reducing soil water evaporation, suppressing weed growth, and moderating soil temperature. Over time, the trash decomposes, adding organic carbon and nutrients back to the soil, which improves soil structure and microbial activity.

Nutrient management is highly important in ratoon crops. Because the root system is already established, ratoon plants require nitrogen early in the cycle to support rapid tillering. The nitrogen requirement of ratoon sugarcane is often twenty-five percent higher than that of the plant crop. Farmers should apply nitrogen in split doses, along with recommended quantities of phosphorus and potassium. Applying organic manures, such as farmyard manure or vermicompost, helps replenish soil organic matter. Farmers must follow Soil Health Card recommendations and consult KVK scientists to design a balanced fertilizer schedule.

Pest and Disease Management

Pest management in ratoon crops requires a vigilant approach due to the continuous presence of host plants. For sugarcane ratoon, shoot borers and root grubs are common threats. Regular monitoring of the field is necessary to detect early symptoms like dead hearts. Biological controls, such as releasing Trichogramma parasites, can be effective in reducing borer populations. Chemical controls should be used as a last resort, following recommended doses to avoid environmental damage and protect beneficial predatory insects.

Diseases like red rot, smut, and grassy shoot disease can severely affect ratoon yields if present in the main crop. Ratoon crops from disease-infected fields should not be kept, and the stubbles must be uprooted and destroyed to prevent the disease from spreading. Using disease-resistant varieties for the main planting is the best long-term strategy. Farmers should consult local agricultural extension officers to identify suitable disease-resistant varieties and obtain recommendations for preventive chemical or biological treatments.

Sorghum and Rice Ratooning

Ratooning in sorghum is a viable option for dryland farmers looking to obtain additional fodder or grain. After harvesting the main crop for grain, the stalks are cut close to the ground. With light irrigation or rainfall, the stubbles sprout quickly, producing a ratoon crop that can be harvested for fodder within forty-five to sixty days, or for grain within eighty days. Sorghum ratooning requires careful nitrogen management to ensure good regeneration. The yield of sorghum ratoon is highly dependent on moisture availability, and it is most successful in areas with well-distributed late monsoons.

Rice ratooning is practiced in specific ecological zones, such as coastal areas or under irrigation where the window between crop seasons is short. After the main crop harvest, the stubbles are left to sprout. A rice ratoon crop can mature in seventy to eighty days, saving significant water and labor. However, rice ratoon yields are generally low, typically thirty to forty percent of the main crop. Managing water levels and applying a small dose of nitrogen immediately after the main harvest are critical for encouraging uniform tillering. Farmers should evaluate if rice ratooning is economically viable compared to sowing a short-duration pulse crop.

Indicative Yields and Guidelines

While ratoon cropping offers cost savings, farmers must keep realistic yield expectations. Indicative yields for a well-managed first sugarcane ratoon can match the main crop, but subsequent ratoons will show a decline of ten to twenty percent. For sorghum and rice, the yields are significantly lower than the main harvest. All yield and financial figures are indicative, and actual results depend on soil fertility, water management, and pest control. Farmers must verify the suitability of ratooning for their specific region by consulting local agricultural universities and extension offices.

To maintain soil health during ratooning, regular soil testing is essential. Farmers should follow the advice on their Soil Health Cards and apply necessary micronutrients like zinc and sulfur. If pest populations, such as pyrilla or borers in sugarcane, exceed economic threshold levels, immediate control measures must be taken. Integrating crop rotation after one or two ratoon cycles is highly recommended to break pest cycles and restore soil fertility. Farmers should avoid the temptation to extend the ratoon crop for multiple years, as this leads to severe soil degradation and low returns.

वारंवार विचारले जाणारे प्रश्न

What is ratoon cropping?

Ratoon cropping is the practice of harvesting a second crop from the stubbles or roots left in the soil after the main crop has been harvested.

Which crops are suitable for ratoon cropping?

Sugarcane is the primary crop for ratooning, but sorghum and rice are also suitable under specific conditions.

What are the main benefits of ratoon cropping?

The main benefits include zero land preparation costs, zero seed costs, reduced labor, and a shorter maturity period.

What is the recommended limit for ratoon cycles?

Carrying over ratoons beyond one to two cycles is generally not recommended due to pest accumulation and progressive yield decline.

Are ratooning yields higher than the main crop?

No, ratooning yields are typically lower than the main crop, especially in subsequent ratoon cycles.

What is stubble shaving in sugarcane?

Stubble shaving is cutting the sugarcane stubbles close to the ground level after harvest to encourage deep, healthy underground buds to sprout.

What is off-barring in ratoon management?

Off-barring is the cutting of old roots on either side of the stubble row to encourage the development of fresh feeder roots and improve soil aeration.

How does trash mulching help ratoon crops?

Trash mulching conserves soil moisture, suppresses weeds, regulates soil temperature, and adds organic matter back to the soil as it decomposes.

Does a ratoon crop need more nitrogen?

Yes, ratoon crops often require twenty-five percent more nitrogen early in the cycle to support rapid tillering and growth.

What are the risks of pest carryover in ratooning?

Pests like stem borers and diseases like red rot can survive in the stubbles, building up populations that can damage the new ratoon crop.

How long does a sugarcane ratoon crop take to mature?

A sugarcane ratoon crop typically matures one to two months faster than the plant crop because the root system is already established.

Is rice ratooning common in India?

Rice ratooning is practiced in specific regions with short windows between seasons, but yields are generally low, around thirty to forty percent of the main crop.

What is the role of a Soil Health Card in ratoon management?

A Soil Health Card helps farmers determine the nutrient deficiencies caused by the previous crop and apply the correct type and dose of fertilizers.

Can sorghum ratoon be used for fodder?

Yes, sorghum ratoon is an excellent source of quick green fodder, regenerating rapidly after the main grain harvest.

Who should I consult for ratoon management advice?

Farmers should consult their local Krishi Vigyan Kendra (KVK) or agricultural extension officer for region-specific guidelines.