Download or read book The Significance of Percentage Base Saturation and PH in Relation to Soil Differences written by Adolf Mehlich and published by . This book was released on 1942 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relationship Between Cation Exchange Capacity Total Bases and Exchange Acidity in Certain Oregon Soils written by Clara Ju-Yuan Lin and published by . This book was released on 1957 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two soils representative of the coast and three representing the Willamette Valley have been studied for their general chemical characteristics. Exchange capacity and exchangeable cations were determined by the ammonium acetate and the BaCl2-triethanolamine buffer methods. Exchange capacity was also obtained from conductimetric titrations which were run on each soil before and after destroying the organic matter. Potentiometric titrations were run before and after leaching each soil with HCl. Lime requirement was determined by Woodruff's method and also obtained from the pH-lime curves. The two coastal soils, Astoria and Clatsop, have lower pH and base saturation and higher organic matter content and exchange capacity than the Melbourne, Olympic, and Willamette soils from the valley. The Melbourne soil had the highest base saturation percentage and Astoria had the lowest. The amount of exchangeable aluminum was also higher in the coastal soils. The amount of exchange capacity contributed to the organic fraction was 65 per cent in the Olympic and Willamette soils and 50 per cent in the other three. The value for exchange capacity by the different methods was in good agreement in the three valley soils before and after the organic matter was destroyed. In the coastal soils there was no agreement between methods in any case. This would indicate that in the latter two soils, type of clay mineral present may be more of an influence than in the former soils. The potentiometric titration curves showed that the two coastal soils were well buffered and the valley soils were only slightly buffered. After the soils were leached with HCl the Melbourne soil was the only one which indicated a strong acid property. The exchange properties of the soils as affected by additions of lime were studied by incubating the soils for four weeks with added increments of lime. With each added increment of lime the pH increased and exchangeable acidity decreased in each soil. The amount of lime to bring the soils to any given degree of base saturation appeared to be proportional to the magnitude of the exchange capacity and inversely proportional to the degree of base saturation. At any given pH value there was a considerable difference in the degree of base saturation for these soils. This might well be a reflection of the type of minerals present in the different soils. More lime was required to bring the two coastal soils up to pH 6.5 as indicated by the pH-lime relationship curve than that estimated by the Woodruff method. Consistent results were observed in the three valley soils. This suggests that the buffer solution at pH 7 as recommended by Woodruff was not strong enough to neutralize the acidity in the coastal soils. There was good agreement between the two methods in the determination of the exchangeable bases. The BaCl2-buffer method gave much higher values of exchangeable acidity than did the ammonium acetate method. These values, when converted to tons of calcium carbonate, agree fairly closely with the amount of lime required to bring the soils to pH 7 when added directly to the soil. When lime was added above the saturation point the amount of exchangeable calcium as determined by the ammonium acetate method increased but remained relatively constant for the BaCl2-buffer method. The various analysis seem to indicate that the Astoria and Clatsop soils contain predominantly 2:1 type clay minerals while the Olympic and Willamette soils contain predominantly the 1:1 type. The Melbourne soil exhibits properties more closely associated with the coastal soils.
Download or read book Some Factors Affecting the PH base Saturation Correlation in Soils written by Elmo Lyman Dinkins and published by . This book was released on 1967 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Base Saturation and PH in Relation to Soil Type written by Adolf Mehlich and published by . This book was released on 1941 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Soil Science written by Ward Chesworth and published by Springer Science & Business Media. This book was released on 2007-11-22 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Soil Science provides a comprehensive, alphabetical treatment of basic soil science in a single volume. It constitutes a wide ranging and authorative collection of some 160 academic articles covering the salient aspects of soil physics, chemistry, biology, fertility, technology, genesis, morphology, classification and geomorphology. With increased usage of soil for world food production, building materials, and waste repositories, demand has grown for a better global understanding of soil and its processes. longer articles by leading authorities from around the world are supplemented by some 430 definitions of common terms in soil sciences.
Download or read book The Effect of Climate and Vegetation on Soil Reaction Percent Base Saturation and Organic Carbon Content of Some Sierra Nevada Soils written by Donnell Leroy Blosser and published by . This book was released on 1970 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Soil Science written by Bernard P. K. Yerima and published by Trafford Publishing. This book was released on 2005 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: A basic and applied textbook, ideal for students.
Download or read book The Red Soils of China written by Michael Wilson and published by Springer Science & Business Media. This book was released on 2004-05-26 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The red soils of China are typical in their chemical, physical and mineralogical characteristics of red soils in other tropical and sub-tropical areas of the world, particularly in South America, Africa and south-east Asia. For the most part, these soils are highly weathered and inherently infertile. They are acidic, nutrient deficient, poor in organic matter and have a low water-holding and supplying capacity. They cannot sustain arable cropping systems without the most careful management and are highly susceptible to soil erosion, particularly on sloping land. It is the purpose of this book to present recent research showing how the problems associated with using the red soils in China for sustainable agricultural production can be overcome, using a variety of traditional and novel approaches. In principle, these approaches should be useful in other tropical and sub-tropical countries faced with the problem of making the best use of their fragile red soil resources. The term "in principle" is used deliberately because, of course, the different red soil countries invariably operate within dissimilar socio-economic frameworks. At the present time, China may be considered to be in the process of an "industrial revolution", rather like that that took place in Britain in the late eighteenth and early nineteenth centuries.
Download or read book Handbook of Soil Conditioners written by Wallace and published by CRC Press. This book was released on 2020-10-28 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work features scientific, technical and practical information on mineral, organic and synthetic conditioners, as well as their beneficial effects on the soil's physical properties that promote optimal plant growth, maximize soil fertility, and enhance biomediation processes. It promotes the synergistic use of various agricultural technologies to manage global concerns of decreasing arable land.
Download or read book USDA Forest Service Research Paper NE written by and published by . This book was released on 1976 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strip clearcutting did not degrade the site in a spruce fir forest in central Maine written by Miroslaw M. Czapowskyj and published by . This book was released on 1977 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of habitat requirements for birds in suburban areas written by Jack Ward Thomas and published by . This book was released on 1977 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Download or read book Soil Survey written by and published by . This book was released on 1988 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Survey of East Carroll Parish Louisiana written by and published by . This book was released on 1987 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiment Station Record written by United States. Office of Experiment Stations and published by . This book was released on 1932 with total page 1154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiment Station Record written by U.S. Office of Experiment Stations and published by . This book was released on 1936 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
