Simulating yields of sorghum and pearl millet in the semi-arid tropics

Huda, A K S (1987) Simulating yields of sorghum and pearl millet in the semi-arid tropics. Field Crops Research, 15 (3-4). pp. 309-325.

PDF Restricted to ICRISAT users only Download (3MB) | Request a copy

Abstract

A sorghum simulation model, SORGF, was revised for use in the semi-arid tropics. As a result of the revisions in the model, the correlation coefficient between observed and simulated grain yield of sorghum (n=59) increased from 0.52 to 0.86. Comparison between simulated and observed grain yields showed that the SORGF model can be used to estimate sorghum yields with reasonable accuracy before harvest. Responses of sorghum to drought-stress and to changes in plant density were simulated. The correlation coefficient between observed and simulated sorghum grain yield data pooled over five levels of plant density and two cultivars was 0.91. The correlation coefficient between observed and simulated sorghum grain yield data pooled over two water treatments, two cultivars, and two seasons was 0.92. The model was used to compute the probabilities of simulated sorghum grain yield and the requirements of N-fertilizers based on 30 years of climatic data for four locations in India. A simulation model for pearl millet was developed following an approach similar to that of SORGF. The pearl millet model was tested against independent data; further testing of the pearl millet model is required before its application.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Sorghum
Depositing User:	Mr Charan Sai Ch
Date Deposited:	06 Nov 2011 02:48
Last Modified:	06 Nov 2011 02:48
URI:	http://oar.icrisat.org/id/eprint/3715
Official URL:	http://dx.doi.org/10.1016/0378-4290(87)90019-0
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

View Statistics

Actions (login required)

View Item