Sustainable Land Fertility Preservation

darza kalkis


Farming is one of the most important sectors of the Latvian national economy. In recent years, with the intensification of the agricultural production, new soil treatment technologies have been introduced and new, intensive and demanding crop varieties are used. The combination of these activities facilitates increased soil degradation – it reduces the necessary activity of micro-organisms and biological processes in the soil thereby increasing the soil acidification process. The majority of farmers try to compensate the nutritional materials necessary for the crops with artificial mineral fertilisers and micro fertilisers. Yet all this is done solely on the basis of general assumptions without taking into account that also such mineral fertilisers are physiologically acidic and have a negative influence on the biological processes in the soil.

Soil is acidified also by rainwater which, according to scientists, has a high contents of acids in recent years. If soil is acid and contains little calcium, the potassium and magnesium contents in the crops are decreased. Whereas aluminium, iron, manganese, zinc, copper, lead, nickel and chrome may be taken up by crops in acid environments even to toxic amounts. Hard metals, except molybdenum, in case of calcium and magnesium deficit accumulate in crops to very large amounts and may cause poisoning of livestock and humans; therefore soil liming is essential also from the environmental protection perspective. It has to be noted that soil liming is one of the preconditions for successful growing of crops, since for a large share of vegetables and fruits calcium is one of the most essential elements for obtaining qualitative yields and successful storing of the yields. Of course, also good fertility and correct and systematic treatment of the fertile soil matters.

Lime performs essential functions:

Calcium source
regular liming in farming is necessary to provide the soil with calcium which is a very necessary nutrient that ensures the development of crops,
Neutralizes acidity
lime has a positive effect on soil, it neutralises the harmful acids and restores the hummus thereby making the soil more fertile
Nutrition elements
lime ensures the growing of crops and the movement of the nutrients necessary for yield, as well as the uptake capacity
In cells
lime ensures the growing of crops and the movement of the nutrients necessary for yield, as well as the uptake capacity

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