A study to compare the different K availability indices employing a fow empirical and K activity ratios was carried out with three different soil groups. The cumulative K release pattern was also studied to categorice the roils for their ability to suppl/ K to plants. The suitability of the methods to predict X availability was evaluated by a pot experiment. using Ganga 5 maize as test crop. The results revealed that the Q/I relationship parameters viz.. -AK, ARK, PBCK, A G were found to be not suitable to predict the K availabilty status and its response.
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Tamil Nadu Agricultural University
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Madras Agricultural Journal (MAJ)
Madras
Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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