منابع مشابه
Relationship Between Soil Exchangeable Sodium Percentage and Soil Sodium Adsorption Ratio in Marvdasht Plain, Iran
Objective: Soil salinity is one of the major worldwide environmental constraints affecting agricultural production in arid and semiarid regions. Lack of proper management of water and soil resources lead to increase soil salinity and reduce soil fertility. On the other hand, it seems simple and cheap method of measuring soil salinity is necessary. The aim of this study was to determine the rela...
متن کاملRelationship Between Soil Exchangeable Sodium Percentage and Soil Sodium Adsorption Ratio in Marvdasht Plain, Iran
Objective: Soil salinity is one of the major worldwide environmental constraints affecting agricultural production in arid and semiarid regions. Lack of proper management of water and soil resources lead to increase soil salinity and reduce soil fertility. On the other hand, it seems simple and cheap method of measuring soil salinity is necessary. The aim of this study was to determine the rela...
متن کاملHYPOTHESIS TESTING FOR AN EXCHANGEABLE NORMAL DISTRIBUTION
Consider an exchangeable normal vector with parameters ????2, and ?. On the basis of a vector observation some tests about these parameters are found and their properties are discussed. A simulation study for these tests and a few nonparametric tests are presented. Some advantages and disadvantages of these tests are discussed and a few applications are given.
متن کاملAn Isotope Dilution Study of Exchangeable Oxygen in Premium Coal Samples
The a n a l y s i s of the moisture conten t of c o a l s has been t h e s u b j e c t of a number of e x t e n s i v e d iscuss ions (1-3). I n t e r e s t i n t h e de te rmina t ion of water i n coal is a r e s u l t of both its importance i n commerce and its inf luence on t h e e lementa l a n a l y s i s of t h e organic p o r t i o n of t h e c o a l . Although s imple weight loss method...
متن کاملContribution of Calcium Oxalate to Soil-Exchangeable Calcium
Acid deposition and repeated biomass harvest have decreased soil calcium (Ca) availability in many temperate forests worldwide, yet existing methods for assessing available soil Ca do not fully characterize soil Ca forms. To account for discrepancies in ecosystem Ca budgets, it has been hypothesized that the highly insoluble biomineral Ca oxalate might represent an additional soil Ca pool that ...
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ژورنال
عنوان ژورنال: Agricultural and Food Science
سال: 1980
ISSN: 1795-1895,1459-6067
DOI: 10.23986/afsci.72028