Show european quality crop result found grow nearest surface wore quality specie increase depth potato grow grow grew temperature found grew found potatoes grown greater level culture fact experiment station quote prof EL follow potatoes ar few brine quality moat diffident starch rib top method aid hydrometer determine amount starch hence quality potatoes ta author light end heavy potatoes test 12 era consequent lower temperature within soil soil tad ad greater specific grown hills hills bills 91 ed own |