Behavior of Phosphoric Acid in the Soil
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1535 grs. 0. 0185 grs.
4 four days 0. 1550 grs. 0. 0188 grs.
5 eight days 0. 1550 grs. 0. 0180 grs.
6 eight days 0. 1550 grs. 0. 0177 grs.
As is shown by the above results, neither the phosphoric acid nor the calcium were retained by the insoluble humic acid.
i Chhn. Veg. Agr. , 4, 123.
37 It was not expected that chemical absorption would take place. The experiment was suggested by the statements of many writers to the effect that humus is active in retaining plant food by virtue of its physic...al structure. The data given above indicate that insoluble free humic acid exerts no influence in rendering phosphoric acid insoluble in water.
The organic acids present in the soil do not, however, exist to any great extent in the free state except in bogs and morasses. Soils suitable for agricultural purposes contain little or no free acid except carbonic acid. In most cases they give an alkaline reaction. Humic acid exists as humates of the bases predomi- nating in the soil. These compounds may be divided into two classes, namely, (i) those insoluble or but slightly affected by water, including humates of calcium, magnesium, iron, and aluminum, and (2) those soluble in water including humates of the alkalies.
What to read after Behavior of Phosphoric Acid in the Soil?
You can find similar books in the "Read Also" column, or choose other free books by James Adrian Bizzell to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
1535 grs. 0. 0185 grs.
4 four days 0. 1550 grs. 0. 0188 grs.
5 eight days 0. 1550 grs. 0. 0180 grs.
6 eight days 0. 1550 grs. 0. 0177 grs.
As is shown by the above results, neither the phosphoric acid nor the calcium were retained by the insoluble humic acid.
i Chhn. Veg. Agr. , 4, 123.
37 It was not expected that chemical absorption would take place. The experiment was suggested by the statements of many writers to the effect that humus is active in retaining plant food by virtue of its physic...al structure. The data given above indicate that insoluble free humic acid exerts no influence in rendering phosphoric acid insoluble in water.
The organic acids present in the soil do not, however, exist to any great extent in the free state except in bogs and morasses. Soils suitable for agricultural purposes contain little or no free acid except carbonic acid. In most cases they give an alkaline reaction. Humic acid exists as humates of the bases predomi- nating in the soil. These compounds may be divided into two classes, namely, (i) those insoluble or but slightly affected by water, including humates of calcium, magnesium, iron, and aluminum, and (2) those soluble in water including humates of the alkalies.
What to read after Behavior of Phosphoric Acid in the Soil?
You can find similar books in the "Read Also" column, or choose other free books by James Adrian Bizzell to read onlineMoreLess
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