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Dry-Farming: A System of Agriculture for Countries Under a Low Rainfall by John Andreas Widtsoe (Paperback / softback, 2015)

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Product Information

[...] The water used by plants is almost entirely taken from the soil by the minute root-hairs radiating from the roots. The water thus taken into the plants is passed upward through the stem to the leaves, where it is finally evaporated. There is, therefore, a more or less constant stream of water passing through the plant from the roots to the leaves. By various methods it is possible to measure the water thus taken from the soil. While this process of taking water from the soil is going on within the plant, a certain amount of soil-moisture is also lost by direct evaporation from the soil surface. In dry-farm sections, soil-moisture is lost only by these two methods; for wherever the rainfall is sufficient to cause drainage from deep soils, humid conditions prevail. Water for one pound dry matter Many experiments have been conducted to determine the amount of water used in the production of one pound of dry plant substance. Generally, the method of the experiments has been to grow plants in large pots containing weighed quantities of soil. As needed, weighed amounts of water were added to the pots. To determine the loss of water, the pots were weighed at regular intervals of three[...].

Product Identifiers

Publisher
CreateSpace
ISBN-10
1502921383
ISBN-13
9781502921383
eBay Product ID (ePID)
213964313

Product Key Features

Author
John Andreas Widtsoe
Format
Paperback / Softback, Trade Paperback (US) ,Unsewn / Adhesive Bound
Language
English
Subject
General & Literary Fiction
Type
Textbook

Additional Product Features

Content Note
Black & White Illustrations
Out-Of-Print Date
27/10/2016
Date of Publication
23/03/2015
Country of Publication
United States

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