▁ 1 9 1 3 ▁there ▁were ▁ 1 , 6 4 5 ▁Germ ans . ▁After ▁ 1 9 0 5 ▁a ▁ban ▁on ▁marriage ▁was ▁en act ed ▁forb idd ing ▁mixed ▁cou ples ▁between ▁German ▁and ▁native ▁population ▁in ▁South - West ▁Africa , ▁and ▁after ▁ 1 9 1 2 ▁in ▁Sam oa . ▁ ▁After ▁World ▁War ▁I , ▁the ▁military ▁and ▁" undes ired ▁persons " ▁were ▁exp elled ▁from ▁the ▁German ▁prote ctor ates . ▁In ▁ 1 9 3 4 ▁the ▁former ▁colon ies ▁were ▁inhab ited ▁by ▁ 1 6 , 7 7 4 ▁Germ ans , ▁of ▁whom ▁about ▁ 1 2 , 0 0 0 ▁lived ▁in ▁the ▁former ▁South west ▁African ▁col ony . ▁Once ▁the ▁new ▁own ers ▁of ▁the ▁colon ies ▁again ▁permitted ▁imm igration ▁from ▁Germany , ▁the ▁numbers ▁rose ▁in ▁the ▁following ▁years ▁above ▁the ▁pre – World ▁War ▁I ▁total . ▁ ▁Medicine ▁and ▁science ▁▁ ▁In ▁her ▁African ▁and ▁South ▁Se as ▁colon ies , ▁Germany ▁established ▁diverse ▁bi ological ▁and ▁agricult ural ▁stations . ▁Staff ▁special ists ▁and ▁the ▁occas ional ▁visit ing ▁university ▁group ▁conducted ▁soil ▁anal ys es , ▁developed ▁plant ▁hy br ids , ▁experiment ed ▁with ▁fert il izers , ▁studied ▁veget able ▁p ests ▁and ▁ran ▁courses ▁in ▁agr onomy ▁for ▁sett lers ▁and ▁n atives ▁and ▁performed ▁a ▁host ▁of ▁other ▁tasks . ▁Success ful ▁German ▁plant ation ▁operators ▁realized ▁the ▁benefits ▁of ▁system atic ▁scientific ▁inqu iry