The Fertility of the Soil Being the Seventeenth Robert Boyle Lecture Delivered
The Fertility of the Soil Being the Seventeenth Robert Boyle Lecture Delivered
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In our eReader you can find the full English version of the book. Read The Fertility of the Soil Being the Seventeenth Robert Boyle Lecture Delivered Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Fertility of the Soil Being the Seventeenth Robert Boyle Lecture Delivered
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This con- fusion between mining and agriculture probably origi- nated in the quasi-normal idea that the more work you do the better the result will be ; but its application to practice with the aid of a steam plough, in the days before bacteria were thought of, ruined many of the clay soils of the Midlands for the next half century. Not only is the subsoil deficient in humus, which is the accumulated debris of previous applications of manure and vegetation, but the humus is the home of the bact...eria which have so much to do with fertility. The discovery of nitrification was only the first step in the elucidation of many reactions in the soil depending upon bacteria, for example, the fixation of nitrogen itself. A supply of combined nitrogen in some form or other 12 THE FERTILITY OF THE SOIL is absolutely indispensable to plants, and, in their turn, to animals ; yet though we live in contact with a vast reservoir of free nitrogen gas in the atmosphere, until comparatively recent times we knew of no natural process except the lightning flash which would bring such nitrogen into combination.
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To quickly assess the difficulty of the text, read a short excerpt:
This con- fusion between mining and agriculture probably origi- nated in the quasi-normal idea that the more work you do the better the result will be ; but its application to practice with the aid of a steam plough, in the days before bacteria were thought of, ruined many of the clay soils of the Midlands for the next half century. Not only is the subsoil deficient in humus, which is the accumulated debris of previous applications of manure and vegetation, but the humus is the home of the bact...eria which have so much to do with fertility. The discovery of nitrification was only the first step in the elucidation of many reactions in the soil depending upon bacteria, for example, the fixation of nitrogen itself. A supply of combined nitrogen in some form or other 12 THE FERTILITY OF THE SOIL is absolutely indispensable to plants, and, in their turn, to animals ; yet though we live in contact with a vast reservoir of free nitrogen gas in the atmosphere, until comparatively recent times we knew of no natural process except the lightning flash which would bring such nitrogen into combination.
What to read after The Fertility of the Soil Being the Seventeenth Robert Boyle Lecture Delivered?
You can find similar books in the "Read Also" column, or choose other free books by Daniel Hall to read onlineMoreLess
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