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- W2029125737 abstract "Abstract An attempt has been made to develop a method to characterize soils with respect to potential potassium (K) supply capacity and release of non‐exchangeable K during cropping and its contribution towards K uptake through a simulation model. The model is based on the equation of continuity (a mathematical statement derived on the basis of principle of conservation of mass of solute and water in a soil element) with the assumption that nutrient flux from soil to root proceeds by mass flow and diffusion and influx into root follows Michaelis–Menten kinetics. Potassium fixation or release in soil has been simulated by incorporating a sink and source function, respectively, to the equation of continuity with the hypothesis that K release takes place in soil when labile K level goes below release threshold level (RTL) and fixation takes place when labile K level goes above fixation threshold level (FTL). Different soil and root parameters required for this model have been determined in solution culture and pot culture experiment, and a computer program has been written in visual basic to run the model. The model was run to characterize a soil with respect to its maximum supply of K to wheat crop from different depths and the contribution of non‐exchangeable K, therein, and compared with the data of a field experiment. It has also been shown by simulation that maximum response towards applied K occurs at a particular value of available K, which shifts towards higher value as RTL increases. Keywords: K supplyK releasecroppingsimulation model" @default.
- W2029125737 created "2016-06-24" @default.
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- W2029125737 date "2005-04-01" @default.
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- W2029125737 title "Characterization of Soil for Potential Potassium Supplying Capacity and Release of Non‐exchangeable Potassium During Cropping Through Simulation Model" @default.
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- W2029125737 doi "https://doi.org/10.1081/css-200050283" @default.
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