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http://krishi.icar.gov.in/jspui/handle/123456789/40353
Title: | STRUCTURED HETEROGENEITY OF SOIL pH AND GRAIN YIELD OF RICE AND WHEAT GROWN IN A SODIC SOIL |
Other Titles: | Not Available |
Authors: | JS SAMRA RK RAJPUT V KATYAL |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Institute of Soil and Water Conservation |
Published/ Complete Date: | 1992-01-01 |
Project Code: | Not Available |
Keywords: | STRUCTURED HETEROGENEITY, SOIL pH, grain yield, rice , wheat, sodic soil |
Publisher: | Not Available |
Citation: | Not Available |
Series/Report no.: | Not Available; |
Abstract/Description: | CONVENTIONAL STATISTICAL METHODS THAT ASSUME INDEPENDENT RANDOM VARIATION ARE INADEQUATE WHEN DEALING WITH SPATIALLY DEPENDENT HETEROGENEITY. STRUCTURAL ANALYSIS OF HETEROGENEITY WAS PERFORMED FOR SOIL pH AND GRAIN YIELDS OF RICE (ORZYA SATIVA L) AND WHEAT ( TRITICUM AESTIVUM L) GROWN UNDER UNIFORM MANAGEMENT IN A SODIC SOIL ( NATRIC HAPLUSTALF ). RELATIVE EFFICIENCIES OF FIELD SAMPLING DESIGNS AND METHODS OF ANALYSIS WERE COMPUTED. THE COEFFICIENTS OF VARIATION(CV) FOR THE YIELD OF RICE AND A SUBSEQUENT WHEAT CROP WERE 16 AND 54% RESPECTIVELY. THE TWO- WAY TREND VARIATION IN SOILpH WAS 21% OF VARIANCE BEFORE RICE PLANTING AND 28% AFTER WHEAT HARVEST. THE SAME PARAMETER FOR THE GRAIN YIELD OF RICE AND WHEAT WAS 12 AND 28% RESPECTIVELY. VARIOGRAM ANALYSIS REVEALED THAT LOCALLY STRUCTURES VARIATION OF SOIL pH WAS 30 AND 48% OF VARIANCE BEFORE RICE PLANTING AND AFTER WHEAT HARVEST , RESPECTIVELY. STRUCTURED HETEROGENEITY FOR GRAIN YIELD WAS 16% IN RICE AND 59% IN WHEAT. SOIL pH HETEROGENEITY EFFECTS ON RICE WERE OF LOWER MAGNITUDE THAN WITH WHEAT. THE RELATIVE EFFICIENCY OF WILKINSON'S NEAREST NEIGHBOUR ANALYSIS AS COMPARED TO A RANDOMIZED BLOCK DESIGN VARIED FROM 623 TO 1682% DEPENDING UPON SIZE AND SHAPE OF THE PLOT. THIS INDICATES THAT SUBSTANTIAL IMPROVEMENT IN EXPERIMENTAL PRECISION IS POSSIBLE BY TAKING ACCOUNT OF POSITIONAL EFFECTS OF OBSERVATION PLOTS. |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Research Paper |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | AGRON .J |
Volume No.: | 84 |
Page Number: | 877-881 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | Not Available |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/40353 |
Appears in Collections: | NRM-IISWC-Publication |
Files in This Item:
File | Description | Size | Format | |
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scan0037.pdf | 108.6 kB | Adobe PDF | View/Open |
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