. The agricultural gazette of New South Wales. Agriculture; Agriculture -- Australia New South Wales. Ang. S,190S.'] Agricultural Gazette of TV. 613 From these^experiments, whicli must be regarded as purely of a pre- liminary nature, it is quite impossible to attempt to estimate the cost, and until the experiment has been tried in the field, on a comparatively large area, I would prefer not to express an opinion on this point. Mr. F. B. Guthrie, Chemist, Department of Agriculture, on seeing the photographs of this experiment, sent to Moree for soine alkaline soil, in order to ascertain, b
. The agricultural gazette of New South Wales. Agriculture; Agriculture -- Australia New South Wales. Ang. S,190S.'] Agricultural Gazette of TV. 613 From these^experiments, whicli must be regarded as purely of a pre- liminary nature, it is quite impossible to attempt to estimate the cost, and until the experiment has been tried in the field, on a comparatively large area, I would prefer not to express an opinion on this point. Mr. F. B. Guthrie, Chemist, Department of Agriculture, on seeing the photographs of this experiment, sent to Moree for soine alkaline soil, in order to ascertain, by experiment, the smallest quantity of nitric acid necessary to correct the poisonous properties of the alkali. The Moree soil, when wet, is naturally a very sticky clay, and in a com- paratively short time, under the influence of the alkali, " puddles " to such an extent as to render percolation practically out of the question. The soil used for the follow- ing experiment was specially selected from an old drain or chan- nel which had been alternately saturated with bore-water, and dry, for the past nine years. It was very hard and tough when dry, and in order to bring it into something like a suitable condi- tion or tilth, it was necessary to use a ham- mer to pulverise the clods. It was strongly alkaline, and contained sufficient carbonates and chlorides to pre- vent the proper growth of cereals. The pots, nine in number, were sown with wheat on June 1-ith, 1907; germina- tion was excellent. Four ^plants only were allowed to grow in each pot. No. 1 contained the untreated alkahne soil as obtained. No. 2 was treated with -002 per cent, nitric acid, No. .j -004 per cent., No. 4 -008 per cent., and so on up to No. 8 ; No. *.) received -25 per cent, nitric acid. The illustration, from a photograph (Fig. -j), represents four of the pots on September 13th, 1907, and was taken in order to record the date on which the benefit of the treatment became clear. The plants in No
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