The use of conversion calcium carbonate (CCC) with the same effect as limestone flour according to GOST R 50261-92 can reduce the cost of liming by an average of 40%. CCC is characterized by high neutralizing capacity (90-95% in terms of CaCO3), contains nitrogen (0.3-0.5%) and phosphorus (0.5-0.6%). Undesirable impurities in SSC include stable, non-radioactive strontium (up to 1.7%) and fluorine (0.3%). The results of the effect of conversion calcium carbonate under the intensive use of arable land in potato crop rotation are presented. The effect of non-traditional ameliorant on changes in the fertility of acidic sod-podzolic sandy loam soil has been revealed. The results of research in a field experiment with two varieties of potatoes: Snow White and Red Scarlett, in the conditions of the Moscow region showed that CCC is a highly effective fast-acting lime fertilizer, in terms of its effect on agrochemical indicators of soils, it is one of the best forms of chemical ameliorant. Products grown on two varieties of sod-podzolic soil (sandy loam/medium loamy) using an average dose of mineral fertilizers (N90P90K90) on acidic soil and produced by calcium carbonate conversion in increasing doses: 3-6 and 4-9 t/ha, according to the Ca/Sr ratio (184-453 and 170-369), as an indicator of quality, were above the threshold value (140). The dynamics of acid-base properties of soils showed that the losses of exchangeable bases in the arable layer for the period 2019-2023 amounted to: CaO – 1.7-4.9 mg/100 g and MgO – 0.9-1.8 mg/100 g of soil, or in terms of per hectare: CaO – 51-147 kg and MgO – 27-54 kg. In connection with this, root feeding with magnesium-containing fertilizer (AgroMag, 60% MgO) in doses of Mg100-200 provided an increase in the yield of the early potato variety of 2.6-4.5 t/ha or 13.6-23.6% to the mineral background, and the content of exchangeable magnesium in the arable soil layer increased by 2.8-3.4 mg/100 g of soil.
Федотова et al. (2024) studied this question.