Changes of 42K efflux (J23K) caused by ouabain and/or furosemide were measured in isolated epithelia of frog skin. From the kinetics of 42K influx (J32K) studied first over 8-9 h, K+ appeared to be distributed into readily and poorly exchangeable cellular pools of K+. The readily exchangeable pool of K+ was increased by amiloride and decreased by ouabain and/or K+-free extracellular Ringer solu...

Phosphorus (P) and potassium (K) are two major nutrients for agricultural productivity sustainability. The spatial variability maps of soil phosphorus content in surfacesoils collected through grid sampling technique were developed using geo-spatial technology Indian Council Agricultural Research-Indian Research Institute (ICAR-IARI) farm, New Delhi, India. Soil available P (NaHCO3-P) P-fractio...

The conventional crop production practices including intensive tillage and open field residue burning in world’ largest rice-wheat system (RWS) are adversely affecting productivity besides deteriorating natural resources ecosystems’ sustainability. In order to improve productivity, potassium (K) use efficiency apparent K balance, adoption of conservation a RWS with management is considered high...

Representations of measure-valued processes in terms of countable systems of particles are constructed for models with spatially varying birth and death rates. In previous constructions for models with birth and death rates not depending on location or type, the particles were assigned integer-valued \levels", the joint distributions of the particle types were exchangeable, and the measure-valu...

We consider the entailment problem in the fragment of first-order logic (FOL) composed of existentially closed conjunctions of literals (without functions), denoted FOL(∃,∧,¬a). This problem can be recast as several fundamental problems in artificial intelligence and databases, namely query containment for conjunctive queries with negation, clause entailment for clauses without functions and qu...

Willow (Salix spp.) is currently being researched as a source of biomass energy in Canada. However, it is not certain whether afforestation with willow plantations will enhance or diminish soil C storage and nutrient availability. Trees are known to have pronounced effects on biologically mediated nutrient cycling processes which can increase nutrient availability, but willows are known to be n...