Raising the pH of acidic soils

Raising the pH of acidic soils.

Gardeners, who cultivate acidic soil, also they are sometimes dissatisfied, first of all then, when they grow vegetables, most of which grow best in neutral soils. Plants of the cabbage family prefer even slightly alkaline soils.

Once we have carried out a test to determine the pH of our soil, we can raise its pH a bit, using liming, that is, feeding with calcium fertilizers. Liming also improves the soil structure and positively affects the decomposition of organic substances and the development of microorganisms. In principle, liming can be used regardless of the time, however, it should not be combined with organic fertilization. The lime reacts with the nitrogen contained in the manure – this process produces ammonia, which can be harmful to plants. Most gardeners use liming in the fall, digging up flower beds before winter. The amount of lime depends on the starting pH of the soil, its type and species of cultivated plants. You can say roughly, that in the case of soil with a pH 5,5 we add 130 g wapna na 1 m2 of sandy soil, 190 g na 1 m2 of sandy loam soil i 260 g na 1 m2 of clay soil. When the soil pH is 6, we add accordingly: 118 g, 155 g i 215 g.

In practice, if we're gonna dig 10 m2 of clay soil with a pH 6, we measure approx 2 kg of lime and sprinkle it evenly while digging. Important, to regularly check the pH of the soil – then we will see, whether the dose of lime used is appropriate. Worth knowing, that the pH level also raises the wood ash.

During liming, we must not forget to take precautions – we should work in protective gloves and glasses. We do not carry out liming in windy weather.