Russian Dandelion (kok-saghyz): An Emergency Source of Natural Rubber

Agricultural Aitkin average Belle Glade Bonners Ferry Cass Lake Chernozem cost Coster 6p crops crown cuttings crusting cultivation damping-off dandelion density disk dormancy dried early Emer emergence equipment fertilizer field flowering Forest Serv germination ground preparation growing season growth Guayule harrow heavy inches increased indicated irrigation June Klamath Falls kok-saghyz plants kok-saghyz roots kok-saghyz seed labor latex linear foot loam machine Miles City mineral soil Minn Minnesota Missoula moisture Mont Montana Moorhead necessary operation Oreg pappus peat soils percent period Plainfield plants per linear plowing pounds per acre rains Red River Valley reports reseeded rogues root cuttings root yield row spacing rubber content Rubber Proj Russian seed saghyz Saginaw samples satisfactory seed collection seed drills seed heads seed production seedbed seedlings sowing sown spring of 1944 stands storage surface taraxacum kok-saghyz temperature tests tion tractor weeding