. Bulletin. Agriculture. On the lufliiouco of Various Ratios of Phosphoric Acid to Nitrogen. 42 3 plainly shown by the plate No, XXXIII. The harvest on November 6 yielded the followinf^ numbers. Total harvest (air dry) Straw Full grains Empty. C. j^rams. 3S-0 A very interesting account of injury by an excess of ammonium salts has also been published by A. D. Hall in the Rothamstead Experiment Station in his publication : " The Continuous Growth of Mangels" 1903. He writes on page 12 as follows : â TABLE IV.âINCREASE OF CROP PRODUCED BY i lb. OF MTRr GEX. Series. Supplied
. Bulletin. Agriculture. On the lufliiouco of Various Ratios of Phosphoric Acid to Nitrogen. 42 3 plainly shown by the plate No, XXXIII. The harvest on November 6 yielded the followinf^ numbers. Total harvest (air dry) Straw Full grains Empty. C. j^rams. 3S-0 A very interesting account of injury by an excess of ammonium salts has also been published by A. D. Hall in the Rothamstead Experiment Station in his publication : " The Continuous Growth of Mangels" 1903. He writes on page 12 as follows : â TABLE IV.âINCREASE OF CROP PRODUCED BY i lb. OF MTRr GEX. Series. Supplied in. Plot-; 4, with minerals only. tons. Plots I, with dung, tons. A N C AC 400 lb. ammonium salts (^86 lb. N.) 550 lb. nitrate of soda ( = 86 lb. N.) 2,000 lb. rape cake ( = 98 lb. N.) f 2,coo 11). rape cake, and 400 t / _ , 9, n, x \ 1 lb. ammonium salt-;. pâ ^4 â 'â â¢) " The injurious effect of the very large amounts of nitrogen added to some of the plots is very manifest wherever there is more nitrogen than the plant can properly deal with. The leaves have a dark green appearance, are much curled and crinkled, and show an increased tendency to variega- tion, the chloro[)h\'ll collecting into dark green or almost black blotches on the lighter background of the leaf. The leaf stalks are often much more coloured and become a bright orange yellow," How manuring with nitrogen in dilTerent (.loses can elfect the yield has been shown l)\' Wagner. He founil that for 100 parts of straw can thus result grains :. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tokyo Daigaku. Nogakubu. Tokyo
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