Ripe, stratified beechnuts, turned out to be almost impossible to sterilize employing the commonly used sterilizers. The recommended way of sterilizing beech nuts is to soak (for 5 minutes, in a 2% solution of NaOCl) the embryos with parts of cotyledons, isolated from nuts partly sterilized with an 15% solution of NaOCl for 15 minutes. The chloraminę (concentration 4%, time of soaking 2 minutes) provided 100% sterility of the fragments of epicotyles and buds; it also increased up to 80% the effectiveness of the sterilization of cotyledons of beech seedlings. The only way to obtain the required effectiveness of sterilization of buds collected in winter from 20-year old trees turned out to be soaking in HgCl2; its concentration and time of exploit soaking can be reduced in comparison to those proposed by Chalupa (1985a), namely from 0.1-0.3% and 15-30 minutes down to 0.05% and 30 seconds.
W latach 1983-1990 na różnych wysokościach w rejonach górskich i podgórskich województwa krośnieńskiego oceniano plenność, wczesność, odporność na choroby i wyleganie czołowych rodów owsa ze SHR Wielopole. Stwierdzono znaczny postęp w hodowli owsa na wczesność i na odporność na rdzę koronową. Wykazano przydatność rodu POB 1286 do uprawy w górach oraz. kilku rodów do dalszej hodowli odmian dla tych rejonów.
Preliminary studies on frost-hardiness of the current year shoots silver fir were conducted between the autumn of 2000 and the spring of 2001 on the 20-30 year old saplings, collected in 5 sample plots distributed throughout the Beskid Śląski Mts. The diffusion of electrolytes from shorts and needles kept in a freezer at the temperature of -25º and -33ºC was analysed using the Dexter's method. The investigations showed essential differences in frost-hardiness of young silver firs from different sample plots. The investigations have shown, that in this region the meteorological conditions similar to those recorded in the year 2000 can occur quite frequently, leading to the second flushing in silver fir. The delay in the October 2000 adversely affected the process of frost-hardening in silver fir, which increased the risk of frost injuries in harsh winter conditions.