A photo of potato tubers produced in healthy soil. The sizes of these potatoes tubers don’t portray what you  are saying…!! 

Healthy soil is crucial for good potato growth because it offers more nutrients   as well as contributes to the pillars of its sustainability. The knowledge of arable farming has been passed on through generations. Healthy soil standards can be attained by the use of deep-rooted crops such as wheat which prevent soil compaction. The farmer can decide to grow wheat after harvesting potatoes as part of a crop rotation plan. This type of plan is used by growers and it keeps the soil quality high.

Besides the use of deep-rooted crops, fertilization is also another factor especially animal fertilizer which is better for the soil as compared to artificial fertilizer. One of the advantages of animal fertilizer over artificial fertilizer is that it not only contains nitrogen, but also many other minerals. With the right animal fertilizer, you can create good soil life full of worms, mould and good bacteria. Achieving this may involve the use of different kinds of animal fertilizers such as chicken fertilizer, rich horse fertilizer and slurry (the wet part of cow fertilizer). Inject the slurry into the soil when the wheat is already growing, when the crop has reached a height of around 10 cm. By injecting into a growing crop, you create very few emissions therefore, wheat plants can cope with this kind of fertilization. Under the right conditions, the effect is lost after just a few days. This will help maintain the soil’s health. Note: animal fertilizer may pose a risk of transmitting bacterial diseases and other diseases if animals are fed with potatoes with these diseases.

Source: https://www.hzpc.com/hzpc-news/the-importance-of-healthy-soil