The sweet potato, moniato, sweet potato or Ipomoea batatas is one of the star tubers of southern Spain. a product that the Andalusian countryside exports strongly and that continues to grow in the national and international markets at great speed. The sandy soils of Cádiz, with fine sand, have become a key area in its production, because, although it is a crop that adapts to soils with different characteristics, the reality is that it is usually done on sandy soil.
Controlled study on the effect of Structure and Black Up® on sweet potato
Four years ago, we carried out a controlled study to evaluate the effect of the contributions of Structure and Black Up® in the cultivation of sweet potato on the Torrebreva farm, located in Rota, Cádiz, on a plot of 8.5 hectares. The variety was Bauregard, the density of the plants was 34,000 plants per hectare in sandy loam soil and with drip irrigation.
The design of the trial comprised the aforementioned plot, of 8.5 hectares, in which a Structure application of 100 liters per hectare was carried out first, before sowing, by means of spray bars to the entire field and then, in the middle of the cycle of crop, another of 20 liters per hectare by fertigation, in this period a contribution of Black Up® of 20 liters per hectare was also made by the same system. Later, both products were added to standard fertilization.
Why Structure and Black Up® in the Sweet Potato Fields
The use of both products sought and achieved:
Favor the development of the crop.
Increase root mass.
Accentuate the interaction with nutrients.
Stimulate the plant.
All this with the sole objective of increasing production and having a healthier and more profitable harvest.
Sandy soils are characterized by their low water storage capacity and their poor content of organic matter and biological activity, as well as high concentrations of salinity. That is why we include Black Up® in the soil treatment, because it is a product with humic substances extracted from Leonardite, through a patented process, which improves the structure of the soil by stimulating the microbial of the soil and increasing the Cation Exchange Capacity (CIC ) and favors the absorption of nutrients, the retention of water, the aeration of the soil and the leaching of salts.
At the same time, these soils have nutrient availability problems, especially phosphorous, so we chose Structure to improve this circumstance. Structure is a liquid nutritional formula for the contribution of phosphorus, enriched with liquid humin, nitrogen and zinc, which is assimilated immediately and efficiently by the crops. It is a highly assimilated phosphorus chemically supplemented with organic acids with numerous exchange radicals that protect phosphorus in the soil and make it four times more effective than other products on the market.
Evaluation of the controlled study in sweet potato cultivation
After treatment, it was evaluated based on three standards:
By production yields at harvest (kilo / hectare).
By category classification of each piece according to its weight and size.
- By the physical characteristics: shape, consistency and coloration:
Some relevant data on the economic performance of the crop
Beyond the obvious positive effect on production and crop quality that our input mix has had on the crop, there is an undeniable economic performance:
87% of the production was in the categories of greatest economic interest. Not all sweet potatoes are paid the same, size matters when it comes to selling it.
The most profitable categories in sweet potato cultivation are 200-400 g and 400-600 g and that is where two Zoberbac Agrocompany products have had the best results. Its production has increased by almost 70%.
The improvement in the aforementioned categories has meant that the economic performance has increased up to 60%.