Patents Assigned to N P S K "Mineralagro"
  • Substrate for cultivation of agricultural crops and rooting of green cuttings in greenhouses and in open air
    Patent number: 4337078
    Abstract: A substrate for the cultivation of plants in greenhouses or outdoors comprises klinoptylolite zeolite, vermiculite and peat in specified particle size ranges and relationships, with enhanced nitrogen and phosphorus content, to provide a highly versatile and surprisingly effective active growing medium.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: June 29, 1982
    Assignee: N P S K "Mineralagro"
    Inventors: Georgi S. Petrov, Ivan A. Petkov, Hristo I. Etropolski, Dimiter N. Dimitrov, Nikolay N. Popov, Atanas I. Uzunov