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Bulletin - State College of Washington, Agricultural Experiment Station Volume 169-189 (Paperback) Loot Price: R650
Discovery Miles 6 500
Bulletin - State College of Washington, Agricultural Experiment Station Volume 169-189 (Paperback): Washington Agricultural...
Bulletin - State College of Washington, Agricultural Experiment Station Volume 169-189 (Paperback): Washington Agricultural...

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Bulletin - State College of Washington, Agricultural Experiment Station Volume 169-189 (Paperback)

Washington Agricultural Station

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Loot Price R650 Discovery Miles 6 500 | Repayment Terms: R60 pm x 12*

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...in organic matter in the soil, whether a residue has been added or not. However, there is a different kind of decomposition depending upon the nitrogen content of the residue. The decomposition of a residue low in nitrogen, like straw, does not seem to proceed any faster than is permitted by the soil's ability to supply the nitrate-nitrogen necessary for decomposition, or, in other words, for the necessary biological activity, while alfalfa, which, with a high nitrogen content, furnishes its own nitrogen supply, is apparently limited as to extent of decomposition by variations in biological flora only. Carbon Dioxide Evolution from Soils of Varylng Nitrogen Content Treated with Straw and Alfalfa 146 days Some of the important deductions from the work thus far indicate: 1. Organic matter maintenance depends on the nitrogen content of the residue. 2. It becomes more difficult to maintain organic matter and nitrogen as the soil becomes more depleted of these materials. 3. The biological activity of the soils of eastern Washington decreases directly with the loss of organic matter and nitrogen. Virgin soils show greatest activity. Soil Fertility Problems in Western Washington--Results from fertility and management investigations on these soils are consistent and supplementary to those previously reported. Muck and peat soils are all acid in reaction and deficient in both phosphorus and potassium to the extent that good results are obtained from fertilizers containing these elements. Some of these soils seem to 'be more deficient in phosphorus, while others will respond most to a potassium application. The application of lime is not justified on the basis of increased yields. Legume crops are not adapted sufficiently well to recommend them for introduction in a ...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: March 2012
First published: March 2012
Authors: Washington Agricultural Station
Dimensions: 246 x 189 x 13mm (L x W x T)
Format: Paperback - Trade
Pages: 236
ISBN-13: 978-1-130-42317-4
Barcode: 9781130423174
Categories: Books
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LSN: 1-130-42317-4

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