Showing papers in "Soil Science in 1962"
TL;DR: Methods of analysis for soil plants and waters, Methods of analyses for soils plants and water as mentioned in this paper, Methods of analysis of soil plants, water, and soil, and their properties.
Abstract: Methods of analysis for soils plants and waters , Methods of analysis for soils plants and waters , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
2,413 citations
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TL;DR: The Forests of the United States (D. Smith), the Northeastern Region (R. Seymour), the Lake States Region (J. Johnson), the Central Region (G. Parker & C. Merritt), the Southern Appalachian Hardwood Region (D as mentioned in this paper ), the Southern Bottomland Hardwood region and Brown Loam Bluffs Subregion (J as mentioned in this paper ).
Abstract: The Forests of the United States (D. Smith). The Northeastern Region (R. Seymour). The Lake States Region (J. Johnson). The Central Region (G. Parker & C. Merritt). The Southern Appalachian Hardwood Region (D. Smith). The Southern Bottomland Hardwood Region and Brown Loam Bluffs Subregion (J. Hodges). The Southern Pine Region (L. Walker). The Middle and Southern Rocky Mountain Region (J. Long). The Northern Rocky Mountain Region (D. Adams). The California Region (J. Helms). The Pacific Northwest Region (S. Tesch). The Alaska Region (J. Zasada & E. Packee). Appendices. Index.
158 citations
148 citations
TL;DR: In this article, the authors present laboratory and greenhouse studies on the control of nitrification of various fertilizers in soils by 2-chloro-6-(trichloromethyl)pyridine.
Abstract: The concept of using chemicals for economic control of nitrification in soils, and the implications thereof, has been previously discussed (2). Certain properties of a chemical, 2-chloro-6-(trichloromethyl)pyridine2, potentially suitable for this use were described. The purpose of this paper is to present laboratory and greenhouse studies on the control of nitrification of various fertilizers in soils by this chemical.
143 citations
TL;DR: In this article, the authors present data of this type that show quantitatively how nitrogen tie-up and release vary at short intervals of time and also with rate of CO2 formation.
Abstract: Numerous experiments have been reported (1, 4–8) that show the quantity of nitrogen required by soil microorganisms in the decomposition of carbonaceous materials, such as straw. These values usually vary between 1.1 and 2.0 per cent of the dry weight of readily decomposable plant materials, including the nitrogen originally present in the plant material, and are often much lower for very woody materials (2). In such experiments, immobilization and mineralization proceed simultaneously; that is, nitrogen that is first immobilized may be in part released later. Nitrogen requirement values, as ordinarily obtained, are, therefore, net values for the given experimental period chosen by the investigator. Few data have been published that show quantitatively how nitrogen tie-up and release vary at short intervals of time and also with rate of CO2 formation. This paper presents data of this type.
TL;DR: A technique for using gamma rays for measuring water content in columns of soil is described in this paper, where an analytical model connecting gamma ray counting rates with soil density and water content is developed from which water contents may be calculated in a column of soil once a preliminary measurement at a known water content and bulk density has been made.
Abstract: A technique for using gamma rays for measuring water content in columns of soil is described. Equations connecting gamma ray counting rates with soil density and water content are developed, from which water contents may be calculated in a column of soil once a preliminary measurement at a known water content and bulk density has been made. Some results of unsaturated permeability measurements made with this method are presented.