Biofertilizer for Tubers: POC Tuber Quality Application Schedule

Biofertilizer for Tubers: Optimize the Tuberization Phase with POC Tuber Quality Formula

Tuber crop farmers, such as those growing potatoes, sweet potatoes, and shallots, often face challenges during the tuberization phase: non-uniform tubers, small size, or high drop rates. Yet, this phase is crucial for determining harvest quantity and quality. This is where biofertilizer for tubers plays an important role. Biosolution presents the POC Tuber Quality Formula, a biological product specifically formulated to optimally stimulate the tuberization phase. This article will discuss the correct application schedule for maximum harvest yields.

Why is the Tuberization Phase Critical?

The tuberization phase is the period when plants transfer photosynthesis products from leaves to underground storage organs (tubers). In potatoes, this phase begins around 30-45 days after planting (DAP), depending on the variety. In sweet potatoes, it occurs when tubers start to enlarge. Shallots also undergo bulb formation. Failure in this phase leads to small, hollow, or easily rotten tubers.

Biofertilizer for tubers, such as the POC Tuber Quality Formula, works by providing natural hormones (cytokinins) and micronutrients that stimulate tuber cell division. The PGPR (Plant Growth Promoting Rhizobacteria) consortium within helps solubilize phosphorus and produce phytohormones, resulting in uniform and dense tuber development.

Superior Composition of POC Tuber Quality Formula

This product contains three synergistic main components:

• PGPR Consortium: Bacillus spp. and Pseudomonas spp. bacteria that stimulate root growth, increase nutrient availability, and produce IAA and gibberellin hormones.
• Seaweed Extract: Rich in natural cytokinins, auxins, and micronutrients such as zinc (Zn) and boron (B) essential for tuber formation.
• Humic and Fulvic Acids: Act as nutrient carriers, increase soil cation exchange capacity, and stimulate lateral root development.

This combination ensures plants receive the right hormonal and nutritional stimulus at critical times.

Application Schedule per Growth Phase

To be effective, the application of POC Tuber Quality Formula must be adjusted to the plant's growth phase. Here is the recommended schedule for potatoes, sweet potatoes, and shallots:

Early Vegetative Phase (15-25 DAP)

During this phase, plants focus on leaf and root formation. Spray POC at a dose of 3 ml/liter of water every 7 days. Apply in the morning before 10 AM. The goal is to strengthen the root system and prepare the plant for the generative phase.

Tuber Initiation Phase (30-45 DAP)

This is the critical time. Increase the dose to 5 ml/liter of water, spray every 7 days. Focus on the leaves and lower stems. The cytokinin content from seaweed extract will stimulate uniform tuber formation. In potatoes, this phase is marked by stolon emergence. Ensure even application.

Tuber Enlargement Phase (50-70 DAP)

Tubers begin to enlarge. Continue application at a dose of 5 ml/liter of water every 7-10 days. Humic acid and PGPR help translocate carbohydrates to the tubers. As a result, tubers are denser and weight increases by 15-25% based on Biosolution field trials. In sweet potatoes, this phase lasts up to 90 DAP.

Maturation Phase (70-90 DAP)

Reduce frequency to every 10 days at a dose of 3 ml/liter. The goal is to maintain tuber quality and reduce drop. PGPR also suppresses soil pathogens such as Fusarium spp. that cause tuber rot.

Proper Application Techniques

• Method: Foliar spray or drench into the soil around the root zone. For potatoes and shallots, foliar spray is more effective as it is directly absorbed through stomata.
• Timing: Morning (06:00-10:00) when stomata are open and temperatures are not yet high. Avoid application during rain or intense heat.
• Spray volume: 400-600 liters of water per hectare for mature plants. Ensure the entire leaf surface is evenly wet.
• Mixing: Shake the product before use. Mix with clean water; do not mix with copper-based or chlorine-based chemical pesticides.

Real Benefits for Farmers

Product performance data shows:

• +15–25% yield weight per plant
• −30% flower/fruit drop
• Easy foliar application
• Safe for organic certification

Farmers in West Java who applied it to Granola variety potatoes reported an increase in tuber weight per plant from 800 grams to 1.1 kg. In shallots, tuber size was more uniform and shelf life was longer.

Conclusion

Biofertilizer for tubers, such as Biosolution's POC Tuber Quality Formula, is the right solution to maximize the tuberization phase. With a proper application schedule according to the growth phase, farmers can significantly increase harvest yields. Start from the early vegetative phase to maturation, and experience the difference.

For further consultation on the application schedule suitable for your commodity, contact the Biosolution team via WhatsApp. Also see the product POC Tuber Quality Formula for more detailed information.

FAQ

What is biofertilizer for tubers?

Biofertilizer for tubers is a product containing beneficial microorganisms (such as PGPR) and organic compounds that stimulate tuber formation and enlargement. Biosolution's POC Tuber Quality Formula contains a consortium of PGPR, seaweed extract, and humic acid that work synergistically to stimulate the tuberization phase.

When is the best time to apply POC Tuber Quality?

The best time is in the morning before 10 AM, when stomata are open. Apply every 7-10 days from the early vegetative phase to tuber maturation. Dosage is adjusted: 3-5 ml per liter of water.

Is this product safe for organic farming?

Yes, POC Tuber Quality Formula is made from natural ingredients and contains no synthetic chemicals. This product is safe for organic certification programs and leaves no harmful residues.

Can it be mixed with chemical fertilizers or pesticides?

It is best not to mix with copper-based or chlorine-based chemical pesticides as they can kill microorganisms. However, it can be combined with other liquid organic fertilizers. Conduct a compatibility test first.

How much yield increase can be expected?

Based on field trials, using POC Tuber Quality Formula can increase yield weight per plant by 15-25% and reduce flower/fruit drop by up to 30%. Results vary depending on field conditions and maintenance.