"Kulh\u00E1nek, Martin" . . "Faltus, Milo\u0161" . "[7FAD03E07C0E]" . . . "RIV/60460709:41210/13:61979" . "P(QI91C118)" . "potassium, fertilizers, waste processing, silicate minerals, high-energy milling"@en . "After 1989, the use of potassium (K) mineral fertilizers in the Czech Republic rapidly dropped. In order to test alternative solutions for K fertilization, the trioctahedral mica mineral zinnwaldite (8% K), orthoclase (10% K) and waste mica from C\u00EDnovec (Czech Republic), consisting primarily of zinnwaldite, were applied as the only K sources for spring barley. The minerals were treated in three different types of high-energy mills under different working conditions. Application rates in the range 139\u2013820 mg K kg-1 were tested in quartz sand cultures. In all treatments, plant growth, total plant biomass and the K content in the plant tissues increased in the order zinnwaldite > waste mica > orthoclase. K fractionation and K plant uptake were significantly influenced by the milling method used. The effect of 195 mg K kg-1 as zinnwaldite on K uptake from K-depleted soils was positive; however, it was smaller than in sand cultures because of the relatively high content of nonexchangeable K in the soils." . . "RIV/60460709:41210/13:61979!RIV14-MZE-41210___" . "Mayerov\u00E1, Mark\u00E9ta" . "5" . "13"^^ . . "After 1989, the use of potassium (K) mineral fertilizers in the Czech Republic rapidly dropped. In order to test alternative solutions for K fertilization, the trioctahedral mica mineral zinnwaldite (8% K), orthoclase (10% K) and waste mica from C\u00EDnovec (Czech Republic), consisting primarily of zinnwaldite, were applied as the only K sources for spring barley. The minerals were treated in three different types of high-energy mills under different working conditions. Application rates in the range 139\u2013820 mg K kg-1 were tested in quartz sand cultures. In all treatments, plant growth, total plant biomass and the K content in the plant tissues increased in the order zinnwaldite > waste mica > orthoclase. K fractionation and K plant uptake were significantly influenced by the milling method used. The effect of 195 mg K kg-1 as zinnwaldite on K uptake from K-depleted soils was positive; however, it was smaller than in sand cultures because of the relatively high content of nonexchangeable K in the soils."@en . . . . "Waste silicate minerals as potassium sources: a greenhouse study on spring barley" . "000320642300004" . . "Koubov\u00E1, Magdalena" . . "Waste silicate minerals as potassium sources: a greenhouse study on spring barley" . . "59" . "Waste silicate minerals as potassium sources: a greenhouse study on spring barley"@en . . . "0365-0340" . . "Waste silicate minerals as potassium sources: a greenhouse study on spring barley"@en . . "5"^^ . . "117100" . . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . . "Madaras, Mikul\u00E1\u0161" . "41210" . "1"^^ . "Archives of Agronomy and Soil Science" .