Literatural survay

Carrot crops grow in all places over the world. That�s why all students of the world have possibility make experiments, observations and biochemical researches.

This caused it�s selection as a subject of researches. Carrot (Daucus carotau) is tubercular plant of the family of Umbrelliferae. It is not known when and by whom it was brought in Georgia, but it is know that in 1841 it was taken in the list of vegetables by Vakhushty Bagrationy.

It is two-years tubercular plant. In the first year it yields the leaves and the fruit and on the second year it yields the seeds. For its development it is necessary to provide nutrition elementsand relevant water content in the soil,warm,light and oxygen. Carrot is the cold resistant. The plant springs up at 4-5 ⁰ C. Maximum temperature is 18-25 ⁰ C. Higher temperatures negatively impact o the yields, photosynthesis. In the vegetation period, lock of water hinders growth of yields. Excess acidity of the soils also impact negatively. PH must be neutral. In the soil quantity of nutrition elements shouldn�t be grown only though increase of the quantity of fertilizers, absorption ability should be also increased, what could be achieved by means of various additives. In our case, ther are used zeolites.

Carrot is regarded as a source of carotene (vitamin A). 100g. Fresh carrot contains about 9g. Carotene. By the day human body�s demand is 15mg. It also contains vitamins of B group (thiamine, tichoflakin, nicotine acid). Ascorbic acid (vitamin C) in caroot is from 5 to 16 mg. %.

There are spread several species of carrots, we applied �Nante�.

The soil � (brown colour, from the meadow was been taken from the yeard of lept school number 43.

Zeolite-Klinophtilolite from Tedzami Georgia was provided by Melilkishvili Institute of Physical and Organic Chemistry. 

   Mineral fertilizations- NH ₄ NO ₃ -34% white

                                        Ca ₃ (PO ₄) ₂-46% white

                                        KCl � 20% brick-red.