Biofertilizer for Tubers: POC Formula for Tuber Quality Increases Yield Weight and Quality

Tuber farmers, such as those growing potatoes, sweet potatoes, and shallots, often face challenges during the tuberization phase. Non-uniform tubers, low weight, and short shelf life are classic problems. The solution lies in the right biofertilizer for tubers. Biosolution presents the POC Formula for Tuber Quality, a liquid organic fertilizer (POC) specifically designed to naturally stimulate tuber formation and enlargement. This article presents field trial data and its mechanism of action.

Mechanism of Action of POC Formula for Tuber Quality

The POC Formula for Tuber Quality works through three synergistic main components:

Consortium of PGPR (Plant Growth Promoting Rhizobacteria)

PGPR are beneficial bacteria that live in the rhizosphere. In this formula, the PGPR consortium plays a role in triggering the production of natural growth hormones such as auxins, gibberellins, and cytokinins. These hormones stimulate cell division and tuber enlargement. Additionally, PGPR increases the availability of micronutrients such as zinc (Zn) and iron (Fe), which are essential for carbohydrate and starch metabolism.

Seaweed Extract

Seaweed extract is rich in natural cytokinins and micronutrients such as magnesium, potassium, and boron. Cytokinins promote cell division in tuber tissue, while potassium plays a role in the translocation of photosynthates to the tubers. As a result, tubers grow more uniformly and densely.

Humic and Fulvic Acids

Humic and fulvic acids act as nutrient carriers and root stimulants. They bind nutrient ions in the soil and release them gradually, making nutrient absorption more efficient. Fulvic acid also increases cell membrane permeability, facilitating nutrient uptake into tuber cells.

Field Trial Results on Potatoes

Field trials were conducted on potato farms in the highlands of West Java. The treatment used the POC Formula for Tuber Quality at a dose of 3 ml per liter of water, sprayed every 7 days from tuber initiation to harvest.

The results showed an 18% increase in tuber weight per plant compared to the control. Additionally, the percentage of grade A tubers (size >150 grams) increased from 55% to 72%. Interestingly, flower and fruit drop decreased by up to 30% due to sufficient nutrient availability during tuber formation.

Field Trial Results on Shallots

On shallot plants, field trials were conducted on sandy coastal soil in Indramayu. Application of POC at a dose of 5 ml per liter of water via drenching every 10 days resulted in a 22% increase in wet bulb weight per clump. Bulb diameter also increased by an average of 0.3 cm.

Farmers reported that shallot bulbs were denser and less prone to rot during storage. This is due to the humic acid content, which increases tuber tissue resistance.

Field Trial Results on Sweet Potatoes

Cilembu variety sweet potatoes were tested in dryland in Central Java. Foliar application of the POC Formula for Tuber Quality (3 ml/l) every 7 days during the tuber formation phase increased tuber weight per plant by up to 25%. Starch content also increased by 8% based on simple laboratory tests, resulting in sweeter and fluffier sweet potatoes.

Proper Application Method

For optimal results, follow these application guidelines:

• Method: Foliar spray or drench.
• Dosage: 3–5 ml per liter of water.
• Frequency: Every 7–10 days, starting from tuber initiation until 2 weeks before harvest.
• Time: Morning before 10 AM or afternoon after 4 PM.

Ensure the spray covers all leaves and stems, as well as the soil around the roots if using the drench method.

Advantages Over Chemical Fertilizers

Biofertilizers for tubers, such as the POC Formula for Tuber Quality, not only increase crop yields but also maintain soil health. The use of PGPR reduces dependence on synthetic chemical fertilizers that can damage soil structure. Additionally, humic and fulvic acids improve soil aggregation, resulting in better aeration and drainage.

In terms of efficiency, the application cost of POC is lower due to small doses and infrequent application. Farmers can also integrate it with conventional fertilization programs without negative effects.

Farmer Testimonials

Mr. Budi, a potato farmer in Pangalengan, said that since using the POC Formula for Tuber Quality, his harvest has been more uniform. "The tubers are all big, none are small. The weight per sack increased by 2-3 kg. I am more confident selling to supermarkets," he said.

Meanwhile, Mrs. Sari, a shallot farmer in Brebes, said, "The shallots are denser, not easily rotten. The selling price is also higher because of the good quality."

Conclusion

The POC Formula for Tuber Quality from Biosolution has proven effective as a biofertilizer for tubers in increasing the weight, quality, and uniformity of potato, sweet potato, and shallot harvests. Field trial data show a 15-25% increase in weight and a 30% reduction in fruit drop. With natural ingredients such as PGPR, seaweed extract, and humic acids, this product is safe for organic certification and environmentally friendly.

If you are interested in increasing your tuber crop yields, consult your needs with the Biosolution team via WhatsApp. Get dosage recommendations and application schedules tailored to your land conditions.

FAQ

What is a biofertilizer for tubers?

A biofertilizer for tubers is an organic fertilizer containing beneficial microorganisms (such as PGPR) and natural compounds that stimulate tuber growth. The POC Formula for Tuber Quality from Biosolution is an example, specifically formulated for the tuberization phase of potatoes, sweet potatoes, and shallots.

How does the POC Formula for Tuber Quality work?

This product works through three mechanisms: PGPR triggers growth hormones, seaweed extract provides cytokinins and micronutrients, and humic-fulvic acids increase nutrient availability and root stimulation. As a result, tubers form more uniformly and enlarge optimally.

Is it safe to use with chemical fertilizers?

Yes, the POC Formula for Tuber Quality can be combined with chemical fertilizers. However, it is recommended not to mix them in the same spray tank directly. Apply alternately with a 2-3 day interval to avoid negative interactions.

What is the correct dosage for potato plants?

The recommended dosage is 3–5 ml per liter of water, sprayed every 7–10 days. For potatoes, start application when the plants are 30-35 days after planting (tuber initiation phase) until 2 weeks before harvest.

Is this product organically certified?

The POC Formula for Tuber Quality is made from natural ingredients and is safe for organic farming. However, organic certification depends on the overall farming system. Consult with the Biosolution team for more information.