Mr. Sun Shulin, a farmer breeder from Zhaoyuan, Shandong Province, has developed a series of super-large peanut varieties by using the parental strain P12 and inducing mutations under special conditions. These new varieties are not only unique in size but also exhibit exceptional growth characteristics and high yields. The plants have strong seedlings, rapid growth, and a robust growth trend. Their leaves are large and thick, nearly twice as big as those of regular peanuts. The stems are sturdy and hard, with a plant height ranging from 40 to 45 cm. The flowering is early, starting about 23 days after emergence, and the number of flowers is abundant. Each plant can produce 30 to 50 pods, and the fruits are exceptionally large—when fully matured, the average weight reaches 540 grams, with some reaching up to 675 grams. Yield per mu (approximately 0.067 hectares) can be as high as 500 to 600 kilograms, even reaching 700 to 800 kilograms. The growing period is around 135 days under normal conditions. The quality is outstanding, with an extremely fragrant aroma and a taste comparable to chestnuts and walnuts, but sweeter. The nuts are so addictive that people often eat them without stopping. The individual nut weight ranges from 160.87 to 187.5 grams, with the largest reaching 235 to 250 grams—more than one time larger than current domestic large peanut varieties, and generally 3 to 4 times bigger. Such a large peanut variety is rare, both nationally and globally, and could potentially challenge the Guinness World Records. As seen in the color photos, "regular peanuts" appear much smaller compared to these super-sized ones. People who see them for the first time are usually amazed and surprised. Cultivating this super-large peanut variety requires careful attention to its specific needs. If the growing conditions are met optimally, it can yield significantly higher results. Here are some key cultivation techniques: 1. **Field Drainage and Irrigation** Water management is crucial. During rainy periods or areas with prolonged rainfall, ensure fields are free from waterlogging. Peanuts cannot grow in waterlogged soil. From the beginning of flowering to full flowering, maintain consistent moisture to increase fruit set. In the late growth stage, if dryness persists for over 15 days and no rain is expected, irrigation should be done immediately. These two critical stages greatly influence yield. 2. **Fertilization Practices** (1) **Formula Fertilization**: Based on the nutrient requirements of peanuts, for every 250 kg of yield, 15 kg of nitrogen, 6 kg of phosphorus, and 12 kg of potassium are needed. Many farmers tend to apply fertilizers blindly, leading to imbalances. To achieve higher yields efficiently, it's important to combine nitrogen, phosphorus, potassium, and trace elements. In the absence of organic fertilizer, a base formula such as 100 kg of compound fertilizer with 25% NPK per mu can be used. Alternatively, you can mix your own: for 500 kg of peanuts per mu, use 7.5 kg of nitrogen (equivalent to 16.5 kg of urea), 100 kg of superphosphate (or 25 kg of diammonium phosphate), and 48 kg of potassium sulfate. (2) **Fertilizer Application Methods**: Half of the basal fertilizer should be applied 5–10 cm on either side of the planting furrow, and the other half in the seedling furrow between the rows. Avoid direct contact with seeds to prevent damage. At the full flowering stage, top-dress with 10–15 kg of urea. During the early or full flowering period, spray a 1% urea and 400-fold potassium dihydrogen phosphate solution on the leaves, repeating every 15 days for 2–3 times. This helps improve fruit size and increases yield by 20–30%. 3. **Late Sowing** It is recommended to sow in May or June. Although early sowing may lead to earlier harvests, it often results in more rotten fruits. Late sowing ensures neater pods and fewer rot issues, provided the growing season allows full maturity. Due to their large size, super-large peanuts are more prone to softening and rotting if not properly handled. Soaking seeds in fresh water before sowing is ideal. You can use Vicone 1000 times diluted solution or 3721 rooting agent at 1000–1500 times for slow soaking for 0.5–2 hours, or quick soak for 15–20 seconds. After removing excess water, sow immediately to enhance germination and resistance. To protect against pests, consider applying granular insecticides in the planting furrow. 4. **Field Management** Pest and weed control follows standard practices for peanuts. If large spot disease (also known as blue rust) appears at the end of July, it must be treated immediately with a strong dose of fungicide. Later, carbendazim can be used to manage leaf spot, which helps keep the leaves healthy and extends their functional life, ultimately increasing yield by several tens of kilograms per mu. By following these techniques, farmers can successfully cultivate this remarkable super-large peanut variety and enjoy impressive yields and quality.

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