flood water contains high amount of sediment affecting the fertility of the coarse grain alluvial fans and flood plains through increasing nutrients. in this study, the effects of the flood water spreading on the soil nutrients recovery were investigated during 10 years (2004-2014) at the poldasht flood spreading station of west azarbaijan in iran. flooded three upper strips were selected at th...

In soils of tropical climate regions the high acidity and the presence of exchangeable aluminum (Al), associated to low fertility, are the main restrainting factors for agricultural production. A laboratory experiment was conducted using 26 soils of different Brazilian regions, to investigate soil acidity components, giving emphasis to Al and their relations with chemical properties. The pH cor...

We characterize the class of exchangeable feature allocations assigning probability Vn,k ∏k l=1WmlUn−ml to a feature allocation of n individuals, displaying k features with counts (m1, . . . ,mk) for these features. Each element of this class is parametrized by a countable matrix V and two sequences U and W of non-negative weights. Moreover, a consistency condition is imposed to guarantee that ...

Let Ω be a Borel subset of S N where S is countable. A measure is called exchangeable on Ω, if it is supported on Ω and is invariant under every Borel automorphism of Ω which permutes at most finitely many coordinates. De-Finetti's theorem characterizes these measures when Ω = S N. We apply the ergodic theory of equivalence relations to study the case Ω = S N , and obtain versions of this theor...

The rates of extraetíon of Na, K, Mg, Ca, and Al with 1 M NH. NO. from the mineraIand organic-rieh layers of sorne Park Grass (Rothamsted) soils were measured at the pH of the soil. Below pH 3.7 exehangeable Al, deríved from the kineties curve, inereases with decreasing soil pH and is less in the organic-rich Iayer. The sum of the basic exchangeable eations, I;(Na + K + Mg + Ca), increases with...

introduction: intensified agriculture over a long-term is an important factor in soil change phenomena that can cause some unwanted effects on soil properties. to examine this hypothesis, chemical properties of the soils under sunflower cultivation over five decades and adjoining virgin lands were investigated in order to monitor changes caused by long-term cropping. the studied soils are influ...

Recent theoretical considerations have played an important role in advancing our understanding of the physiological mechanisms responsible for perturbing the plasma water sodium concentration ([Na(+)](pw)) in health and disease. Central to these considerations is the original empirical relationship between the [Na(+)](pw) and total exchangeable sodium (Na(e)), total exchangeable potassium (K(e)...

The dysnatraemias are common electrolyte disorders encountered in hospitalized patients [1]. The pathophysiology and approach to management of these electrolyte disorders have been well characterized. It is well known that the total exchangeable sodium (Nae), total exchangeable potassium (Ke) and total body water (TBW) are the major determinants of the plasma water sodium concentration ([Na]pw)...

Response of Potassium (K) is boosted due to the introduction high-yielding varieties and cropping intensity. So, a pot experiment was done see allocation native added K in soils response this on rice. Seven soil samples from seven AEZs. An amount 1-kilogram taken each 28 earthen pots which 14 for cultivation rice without as control. other fertilizers applied follows Fertilizer Recommendation Gu...