Vol. 8, Issue 8, Part J (2024)
Evaluation of multi-nutrient extractants for determination of available phosphorus, potassium and micronutrient cations in red soils of Alfisols
Author(s):
Krishna Murthy R, Govinda K, Bhavya N, Veeranagappa, Uday Kumar SN, Annappa NN, Sanjay Srivastava and Dey Pradip
Abstract:
The study examines multi-nutrient extractants' ability to measure available phosphorus, potassium, and micronutrient cations in Alfisols red soils, aiming to improve soil testing for sustainable agriculture.
Objective: The primary aim of the study is to evaluate the efficacy of various multi-nutrient extractants in determining the levels of available phosphorus, potassium, and micronutrient cations like iron, manganese, copper, and zinc in the soil samples collected.
Method: The research involved the collection and analysis of sixty soil samples from various taluks in the Bangalore Rural district. These samples were categorized based on their pH levels and tested for a range of physico-chemical characteristics. The levels of available nutrients were assessed using established procedures and various multi-nutrient extractants, specifically Ammonium bicarbonate diethylene triamine penta acetic acid (AB-DTPA), Mehlich 3, and Acid ammonium acetate-ethylene diamine tetra acetic acid (AAAc-EDTA).
Findings: The study found that the Brays, Olsen, and NH4OAc methods yielded higher mean concentrations of phosphorus and potassium than alternative methods, with NH4OAc-K2O being particularly effective across various pH levels. Additionally, AB-DTPA and AAAc-EDTA extractants were superior in extracting soil micronutrients such as iron, manganese, copper, and zinc, especially when compared to DTPA. The correlation coefficients between DTPA and other extractants varied, indicating a potential preference for AB-DTPA and AAAc-EDTA in certain conditions.
Impact: The study suggests using multi-nutrient extractants for soil analysis to improve efficiency and promote sustainable farming, but emphasizes the need for additional validation of these results and their impact on soil testing methods.
Pages: 771-778 | 286 Views 103 Downloads
How to cite this article:
Krishna Murthy R, Govinda K, Bhavya N, Veeranagappa, Uday Kumar SN, Annappa NN, Sanjay Srivastava and Dey Pradip. Evaluation of multi-nutrient extractants for determination of available phosphorus, potassium and micronutrient cations in red soils of Alfisols. Int. J. Adv. Biochem. Res. 2024;8(8):771-778. DOI: 10.33545/26174693.2024.v8.i8j.1865