The most favourable Romania's pedoclimatic conditions for most vegetable species (in our country we can cultivate over 80 vegetables species) represent certain opportunities concerning this sector adhering criteria to European vegetables growing.
More than this, rather reduced chemical fertilizers and pesticides utilization, during years, sometimes significant organic fertilization administrated, represents a special premise to obtain high quality vegetables.
This papers refers to the main requirements for vegetable crops (27 crops) regarding the different soils agrochemical peculiarities. There are also presented the criteria to appreciate soils fertility considering capacity and intensity factors for different systems of vegetables growing more or less intensive: in the field, greenhouse or hot house. Various agrochemical indicators (IN, P and K in AL, N, P and K in EA 1:2.5 or 1:5 g/g) are considered as well as their dependence on organic matter content in case of protected vegetable crops.
In accordance with fertility requirements of the soils cultivated with vegetables, we present the most nutritive elements quantity taken from soil for obtaining a tone of vegetables. This quantity differs greatly: for nitrogen - from 1.7 kg/t cucumbers cultivated in the greenhouse to 10,32 kg/t for cauliflower, for P 0.7 kg/t parsley to 6.1 kg/t for green beans and potash from 1.85 kg/t summer-autumn tomatoes to 25.1 kg/t for garden beans. Considering these data, we also established a classification of the main vegetable crops, where we found out that generally they have high and very high nitrogen consumption medium phosphorus consumption and high - very high potash consumption.
Considering Romania's soils fertility cultivated with vegetables as follows: 25-30% with low quantity as N, 30-35% low and very low quantity of mobile P and 10-15% low changeable K, the paper suggests a s.a. necessary quantity for vegetable crops in order to obtain potential possible medium productions namely 25-30 t/h which can direct our country as a more honourable place among European countries in comparison with the present situation.
