Varietal progress in cereal yields in 1986-90 against the background of the twenty-year period
1993
Krzymuski, J. (Instytut Hodowli i Aklimatyzacji Roslin, Radzikow (Poland). Samodzielna Pracownia Ekonomiki Hodowli Roslin i Nasiennictwa)
The period 1986-90 was characterized by an accelerated movement of cultivars in testings and in the register as well as by an increased varietal progress. The seed reproduction allowed to transmit quickly new cultivars to production, despite reduction of the plantation area. The new cultivars spread quickly in state farms giving thus high production results, whereas on private farms the spreading rate of the varietal progress was much slower and the production results were worse
显示更多 [+] 显示较少 [-]