Vol. 8 (6) : November-December 2017 issue
Green Farming Vol. 8 (6) : 1320-1323 ; November-December, 2017
Enhancing the fertility of acid soil using fly ash
E. NIVETHA1* and S. SHEEBA2
Deptt. of Soil Science & Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore - 641 003 (T.N.)
Designation : 1P.G. Student *(nive.vino92@gmail.com), 2Associate Professor
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-5575
Total Pages : 4
Received : 23 July 2016
Revised accepted : 28 September 2017
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Citation :
E. NIVETHA and S. SHEEBA. 2017.Enhancing the fertility of acid soil using fly ash. Green Farming Vol. 8 (6) : 1320-1323 ; November-December, 2017
ABSTRACT
Fly ash, a waste material from thermal power station is now considered as a resource, based on its use in different sector. In agricultural sector it has been used to enhance soil fertility and improve crop productivity as a nutrient source and as soil ameliorant. With the view to use fly ash as an ameliorant for acid soil, the present investigation has been carried out during 2015 –2016 at Rice Research Station, Ambasamudram, where the soil was acidic (pH-4.75).This is a comparative study of fly ash application alone in different levels and in combination with different liming materials viz., lime and dolomite along with recommended dose of fertilizers on soil acid neutralizing capacity and nutrient availability of the soil. The treatments for the field experiment were laid out in RBD with 3 replications. The treatments include control, 100% RDF alone, Lime + RDF, Dolomite + RDF, FA @ 10,20,30 and 40 t ha-1 along with RDF, 50% Lime + 50% FA + RDF and 50% Dolomite + 50% FA + RDF. The pH of post-harvest soil ranged from 4.76 to 7.08. The application of 50% Dolomite + 50% Lime + RDF significantly increased the soil reaction (7.08) whereas in case of EC only a small magnitude of increase was observed over control. The highest N (270 kgha-1), P (130 kgha-1), K (348 kgha-1), Ca (29.6 mgkg-1), Mg (12.0 mgkg-1) and micronutrients (Fe-33.12 , Mn-15.0 , Zn-1.32 and Cu- 0.96 mgkg-1) in post harvest soil was recorded in 50% Dolomite + 50% FA + RDF followed by 50% Lime + 50% FA + RDF and FA @ 40 tha-1. Thus application of fly ash supplemented with other liming materials like lime and dolomite can alleviate soil acidity and enhance soil fertility.
Key words :
Acid soil, Ameliorant, Dolomite, Fertility, Fly ash, Lime, Neutralizing capacity, RDF.