Application of Mitscherlich-Bray Equation on Mungbean Crop for Economic Fertilizer Use
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Mungbean (Vigna radiata L) is a substantial pulse crop because of its advantageous nutritional profile, soil refining capacity and adaptability to diverse climatic conditions. In Pakistan, it is cultivated on a larger scale, nevertheless, it faces a crucial loss due to unwise fertilizer management. Huge market constrictions and monetary gap is observed owing to mismanagement practices in fertilizer uses like time of application, right doses, methods of application and soil nutritional resources. In this regard, there is a dire need to evaluate the accurate amount of fertilizers required for obtaining maximum yield potential along with farmer-friendly financial management. For such type of analysis, the Mitscherlich-Bray equation is among the best possible estimators for theoretical as well as actual fertilizer demand in any crop. The equation was applied on our current experiment comprising ten treatments which were made by combination of three basic nutrients i.e. Nitrogen (N), Phosphorus (P) and Potassium (K) and applied at various rates. The theoretical yield was calculated by plotting log y (grain yield) versus 1/x (amount of nutrients applied). The results showed that the maximum theoretical mung bean yield for P and K was 1350 kg/ha and 1138 kg /ha, respectively. The C1 values for P and K were 0.0271 and 0.0023, respectively. These values of C1 showed that K had a smaller value than P which indicates that soil K contributes less than Soil P to the growth of Plants. The results and understanding of this study can open new ways for estimation, application and dosing of crops especially these which are fertilizer sensitive. It will subject to decrease the losses which occur due to under and over dosing of fertilizers as well as nutrient selection. Lastly our study clearly depicts a model which, before application of nutrients into the soil can affirm economic gain in terms of inputs and crop yield.
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