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Spatial Variability of Soil Factors Affecting Irrigated Lowland Rice Yield


Warris, Mohd Nasir (2002) Spatial Variability of Soil Factors Affecting Irrigated Lowland Rice Yield. Masters thesis, Universiti Putra Malaysia.

Abstract / Synopsis

Spatial variability of soil chemical and physical properties, and its influence on leaf nutrient content, and yield components were studied in a 0.95 ha rice field in Kuala Selangor. A total of 120 soil samples at 15 cm depth and 120 samples of rice plant were taken at harvesting stage based on grid point sampling of 10m x 10m. The studies revealed that coefficients of variation for soil physical properties were in the order of bulk density > soil moisture > clay content. Soil chemical properties showed coefficients of variation in the order of K > Mg >total-N > CN ratio> P> Ca > total-S > total-C and Cu > Zn > Na > Mn > pH. The coefficients of variation for leaf nutrient content were found to be in the sequence of Cu > Zn> P > K> Mg > N > Na > Mn > Ca. The range for soil physical properties was found to be in the order of bulk density (134 m) > soil moisture (100 m) > clay content (17 m), while the range for soil chemical properties was in the sequence of Mg (21 8 m) > total-C (161m) > pH (134 m) 2: total-S (134 m) 2:P (134 m) > Ca (120 m) > total-N (54 m) > CN ratio (46 m) > Na (41 m) > Mn (35 m) > Cu (20 m) > Zn (15 m).

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Additional Metadata

Item Type: Thesis (Masters)
Subject: Soils - Rice - Case studies
Call Number: FP 2002 38
Chairman Supervisor: Anuar Abdul Rahim, PhD
Divisions: Faculty of Agriculture
Depositing User: Mohd Nezeri Mohamad
Date Deposited: 06 May 2011 15:03
Last Modified: 06 May 2011 15:11
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