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  • The influence of crop rotation and nutrition regime in winter wheat on the phytomass remains and the deposits of weed seeds remained in the ground
    10-13
    Views:
    126

    An important problem refers to soil weeds seed bank with special reference to brown luvic soils and relationship between vegetal remains
    (roots + stub) and nutrition regime – crop rotation plant. A great number of seeds can be found in first 20 centimeters of soil (plowing
    layer). This fact causes a high weeds density, which has a negative effect on the cultivated plants leading to partial or total crop loss.

  • The influence of biostimulators in the growth of some shrubs
    49-52
    Views:
    58

    More sensitive than Mimosa pudica and more beautiful than any adornment detached from nature by man, the azalea (Azaleea
    indica) gathers through its shapes a real symphony of colours and enchanting hues, of elegant shapes, having no rival in the flower world.
    The azalea can multiply through seeds and vegetatively: seedlings, grafting, layering.
    The widest reproduction method remains that through semilignified seedlings, a method that can be used throughout the year
    avoiding the months less favourable for propagation by seedlings, with poor light: November and October. The best results are given by the
    spring propagations by seedlings (February-March) and the summer propagations by seedlings (July-August). The rooting can last for 12-14
    weeks until the seedlings can be transplanted in flower pots without risks.
    A wide application in horticultural practice is the use of growth substances, that take part in the faster formation of roots and in a
    higher percent for species of plants, that, normally, root with difficulty through seedlings. Under this aspect, many synthetical compounds
    have proved to be very active (IAA, NAA, IBA, 2,4,5-T acid etc.) (3,4).