. Fertilisers and manures. ^ 53 S= tn bo Coo J2 Z Z .* ^ — I. P 2 W KZ < ca d u VI.] POTASH MOST EFFECTIVE IN DR Y SEASONS 175 inferred from the fact that its effect upon the yield isalways most pronounced in dry seasons. Referring again to Tabic XXXIV., it will be seenthat in the dry season of 1893, the yield of barley(grown also with ammonium salts and superphosphate)was increased by a dressing of potash from i8-i to 308bushels per acre, whereas in the wet season of 1894 theincrease was only from 349 to 41-4 bushels per acre. Similarly with the wheat (Table XXXV., p. 139),in the wet seaso
. Fertilisers and manures. ^ 53 S= tn bo Coo J2 Z Z .* ^ — I. P 2 W KZ < ca d u VI.] POTASH MOST EFFECTIVE IN DR Y SEASONS 175 inferred from the fact that its effect upon the yield isalways most pronounced in dry seasons. Referring again to Tabic XXXIV., it will be seenthat in the dry season of 1893, the yield of barley(grown also with ammonium salts and superphosphate)was increased by a dressing of potash from i8-i to 308bushels per acre, whereas in the wet season of 1894 theincrease was only from 349 to 41-4 bushels per acre. Similarly with the wheat (Table XXXV., p. 139),in the wet season the application of potash onlyincreased the yield of grain from ii-i to 160 bushels,and the weight from 546 to 578 lb. per bushel; whereasin the dry season the yield was increased from 77 to16-4 bushels (more than double), while the weight wasraised from 564 to 626 lb. per bushel. That the badresults in the dry year were due to a premature ripen-ing of the plant, which was deferred by the potash, isseen from the fact that with potash the ratio of grainto
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