Assessment of Soil Potassium Supplying Capacity from Soil Nutrient Reserves and Dissemination of Nutrient Management Technologies through Nutrient Manager

Information generated from this project would help develop soil based coefficients on allowable draw down of soil K reserves, which can be used with Nutrient Manager for rice and maize in the determination of their fertilizer K requirements and for their dissemination.

IPNI-2010-BGD-6

Overview

Objectives and Justification: ACIAR-funded rice-maize project is being conducted at 4 districts in Bangladesh since October 2008. One of the main focus of the project is the development and evaluation of site-specific nutrient management (SSNM) principles and tools for dissemination of fertilizer recommendations through Nutrient Manager for rice and maize, a software developed for profitable fertilizer recommendation. Read more

Year of initiation:2010

Year of completion:2013

Interpretive Summary

2014

The project was initiated to estimate the variability in K-supplying capacity of soils in Dinajpur, Rangpur, Bagura, Rajshahi, Nawabganj, Sirajganj, Tangail, Faridpur, Jhinaidah, Sathkhira, and Comilla Districts of Bangladesh. Pot experiments were conducted for rice and maize using soils collected from 18 locations. Two treatments included 1) zero K and 2) 100 mg K/kg soil. Other limiting nutrients were applied at fixed rates to both the treatments.

2013

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This project was initiated to estimate the magnitude and variation in K-supplying capacity of a range of soils with varying soil properties in Bangladesh using a plant-based assay. Soil samples were collected from Dinajpur, Rangpur, Bagura, Rajshahi, Nawabganj, Sirajganj, Tangail, Faridpur, Jhinaidah, Sathkhira, and Comilla districts of Bangladesh, representing diverse mineralogy and properties related to soil K supplying capacity.