Fosforilannoituksen porraskokeet 1977-1994 : vuosittain annetun fosforimäärän vaikutus maan viljavuuteen ja peltokasvien satoon monivuotisissa kenttäkokeissa

Abstract

Phosphorus fertilizer rate trials, 1977-1994. Effects of the rate of annual phosphorus application on soil fertility and yields of field crops in long-term field experimentsvokKirjasto Aj-kPhosphorus fertilizer rate trials, 1977-1994. Effects of the rate of annual phosphorus application on soil fertility and yields of field crops in long-term field experiment