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Prof. Adely Mohamed Morsey :: Publications:

Title:
STEPWIES REGRESSION AND RESPONSE CURVE ANAI SIS FOR IMPORTANT YIELD FACTORS IN MAIZE
Authors: Shafshak, S.E.*; Abd EI-Halim, A.A.; Rosenberger, J.L; Saad, A.M.M. and Abmed, F.A.
Year: 1995
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: Local
Paper Link: Not Available
Full paper Adely Mohamed Morsey_12222.pdf
Supplementary materials Not Available
Abstract:

Two field cpcnmcnts were conducted at the Research and ExpcrimcnLal Centcr of Moshtohor. Faculty of Agriculture in I991 and 1992 seasons. Three planting dates JcarI (May Is). intermediate (June t1) and laie (July جf)J, two maize varieties (Gua 2 and T.WC 310) and five nitrogen fcnhiicr levels (30. 60, 90. 120 and ILSO kg N/fed ) sserc csaluaied. Strip plot design with three replications in first season and four in the second one for each planting date was used Varieties were randomly assigned in the vertical stٌps and nitrogen fertilizer Icscls in the hori,ontal strips (‘onibined anal»is over both ears was made for the three planting dates of single eperimcnts for each season scparatcl. The obtained results can be snmmareicd as follows Rcsponsc curse anadsis: In first season. data of M.is planting showed that the best nىodel fitted to thc icld data of vartet Gua 2 was quadratic plus plateau model. whereas linear plus plateau model fit well to the )icld ofT W C Ib aruc1% In June and July planting. the best model was lincar plus plateau for the Iwo tested varieties hi second season, the best model lined lo the yield data was Inicar plus plateau model for the two sarictics en Ma planting and also for Giza 2 varict in June planting The quadratic model fit wcll to the icld ot’ T W (‘ lIP sarict In Jeme planting and also for both sariettes in Jul planting Stcpwisc regression anal3 sis: The results iiidicaled thai ؟K 7%’ el Ili total s;ereahuon in the sield could be lincarl related to the studied sacuibles W ‘)9% of the total içld s artatioui could be attributed to the s :iriahlcs uiieludcd iiito the model and I 7t,% could be duc lo ihe cliinin:ited sanables I’lie sanables included to the neodçl could be arr;i.igcd according io their relatuse importance mc.esuicd b% partial R2. in a deseendiueg ordenas

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