power of micro-organisms in soils 197
IV. Effect of urine on nitrification in soils 197
V. Solution used by Professor Frankland in cultivating nitrificative micro-organisms 198
VI. Experiments by Boussingault on rate of nitrification 198
VII. Nitrogen as nitrates in Rothamsted soils after bare fallow in lb. per acre 198
* CHAPTER V.--POSITION OF PHOSPHORIC ACID IN AGRICULTURE.
Occurrence of phosphoric acid in nature 199
Mineral sources of phosphoric acid 200
Apatite and phosphorite 200
Occurrence of phosphoric acid in guanos 202
Universal occurrence in common rocks 202
Occurrence in the soil 203
Condition in which phosphoric acid occurs in the soil 203
Occurrence in plants 204
Occurrence in animals 205
Sources of loss of phosphoric acid in agriculture 205
Loss of phosphoric acid by drainage 206
Artificial sources of loss of phosphoric acid 206
Charles Morton Aikman was a prolific writer; a man of inexhaustable energy and curiousity. 'Manures and the Principles of Manuring' became the definative work on the topic; but it was only one of a long list of vital and robust works written by Mr. Aikman. Some of his other works (hopefully soon to be available through Manybooks):
*Tetherball: Official Rules and History
*Personal Grooming Tips of the French
*Miniature Poodles: Pets or Food?
*A Natural History of Abyssinian Rodent Ticks
*Lotty Henderson and the Smugglers of Sandy Cove
*The Rhyming Bible
*Down the Yellow River with I.P. Freely
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