Some Observations On Manuring With Bone Dust

Cover Some Observations On Manuring With Bone Dust
Some Observations On Manuring With Bone Dust
S Uchiyama
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5 g. Wood ash 6. 2 g. NaNOg 0. 8 g. Bone dust 9. 5 g. Wood ash 6 g. NaNOg 2 g. Bone dust 1. 94 g. K2SO4 Grains 49. 8 54-5 50. 2 52. 0 Straw 51. 2 529 49. 9 47-5 Chaffs 4. 0 3-9 3-9 4. 2 Total 105 oi^ 111. 3 104. 0 i03. 7-^> If we now assume the total yield with the manure of the group iv to be= TOO, we obtain the following ratio : I lOI ir 107 III 100 IV 100 Hence there was no decisive difference between the effects of potassium sulphate and potassium carbonate when the nitrogen was added as ni...trate.
Experiment with Soy-bean.
Eight zinc pots were manured as follows i). The weight of one plant in the group I would therefore be 7 g. In the airdry state (105-5-15 = 7).
2). The average weight of One plant in the group IV was again 7 g. (105. 7-5-15 = 7). In the first experiment, when bone dust was applied together with ammonium n'trate and gyfsum, the average weight of one plant was also 7 g. (62. "-5-3~7).
114 S. Vcliiyaina.
Nutrients!).
Sodium nitrate ... , Bone dust Potassium carbonate Wood ash Potassium sulphate I 2.


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