常見字詞
50 per cent acid acre-foot angle apothecia apple average yields bolts brash broomcorn brown rot Bureau bushels butterfat cage calves cankers cent daughters color concentration conidia cost cows crop crystal Currituck County curves daughters of sire diameter district drainage effect eggs experiments fall plowing fallow feet females fertilizer Figure fruit fungus grain grown growth illus inbred inches increase indicated infection insemination June kafir larva leaf area load loblolly pine logs males material method microscope mixture moisture Moro Nephi nitrogen obtained operation optic parasite peach pecks pellagra percentage period phosphoric acid pine plants plots potash potassium pounds production proportional-limit pumping pupae queen ratio refractive refractive index ringed branches seed shown Sitka spruce sodium nitrate soil solution species specific gravity specimens spring plowing stress stripe disease substance sulphate sweetpotatoes Table temperature tests tion trees unit weight winter wheat wood