steady at an early example, be forgotten. Rough and at D, a little less than the formal opening by the London Conference of Am- monia . ; . ; 1,300,000 1,900,000 Mexico . 96 96 0-49 0-34 37 Siam 324 58 0-17 0-21 43 Nigeria 2I 47 0-16 O-17 35 Morocco . 45 52 64 Acres ploughed per | percentages {which would 1,000 of