Proceedings of the ... Annual Meeting of the Georgia State Horticultural ...
Proceedings of the ... Annual Meeting of the Georgia State Horticultural ...
Georgia State Horticultural Society, Georgia Breeders' Association, Georgia Dairy And Live Stock Association
The book Proceedings of the ... Annual Meeting of the Georgia State Horticultural ... was written by author Georgia State Horticultural Society, Georgia Breeders' Association, Georgia Dairy And Live Stock Association Here you can read free online of Proceedings of the ... Annual Meeting of the Georgia State Horticultural ... book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Proceedings of the ... Annual Meeting of the Georgia State Horticultural ... a good or bad book?
What reading level is Proceedings of the ... Annual Meeting of the Georgia State Horticultural ... book?
To quickly assess the difficulty of the text, read a short excerpt:
Until about 1840 the humus of the soil was generally regarded as the source of substantially all of the nourish- ment of the plant, including the carbon, which constitutes so large a part of all vegetable substances. The mineral substances had hitherto received comparatively little attention because their role in the workshop of the vegetable cell was not only unknown but scarcely suspected. Liebig convinced the world that the organic matter of the soil is of relatively little importance as a p...lant food; that plants derive their carbon from the atmosphere and that the amount of the growth of plants on a given soil is determined by the abundance of certain mineral substances in it. Thus, only sixty-three short years ago, were formulated the scien- tific principles which made possible our modem scheme, of rational fertili- zation with mineral manure. Useful as the humus is to give to many soils desirable physical properties, we now know that even its nitrogen is locked beyond the reach of the higher plants until it is unlocked by bac- teria with which the soil teems and is changed first to ammonia and then to nitric acid or nitrates.
You can download books for free in various formats, such as epub, pdf, azw, mobi, txt and others on book networks site. Additionally, the entire text is available for online reading through our e-reader. Our site is not responsible for the performance of third-party products (sites).
User Reviews: