Comparative evaluation of karanjin and extracts of karanja (Pongamia glabra Vent.) and neem (Azadirachta indica L.) seeds for retardation of nitrification of urea in soil

Sahrawat, K L (1982) Comparative evaluation of karanjin and extracts of karanja (Pongamia glabra Vent.) and neem (Azadirachta indica L.) seeds for retardation of nitrification of urea in soil. Journal of the Indian Sociely of Soii Science, 30 (2). pp. 156-159. ISSN 0019-638X

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Abstract

The effect of alcohol extracts of karanja (Pongomia glabra) and neem (Azadirachta indica) seeds in retarding the nitrification of urea was compared to that of karanjin in an incubation experiment. Application of the seed extracts at a rate corresponding to 30 percent of the N rate was comparable to karanjin applied at 5 and 10 per cent concentration. The extracts were effective for a period of up to 45 days, while karanjin was effective for up to 60 days. The different patterns of nitrification inhibition observed with karanja and neem seed extracts suggested an advantage in using a mixture of the two.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Others > Soil Science Others > Fertilizer Applications
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	30 Nov 2011 06:22
Last Modified:	30 Nov 2011 06:22
URI:	http://oar.icrisat.org/id/eprint/4528
Official URL:
Projects:	UNSPECIFIED
Funders:	Indian Council of Agricultural Research
Acknowledgement:	The author is grateful to the late Professor K.C. Gulati for suggesting this research problem and to Dr. S.K. Mukerj ee, Head, Division of Agricultural Chemicals for encouragement and helpful suggestions. Financial support from the Indian Council of Agricultural Research, New Delhi in the form of a senior research fellowship is grate­ fully acknowledged.
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