Volume No. 9 Issue No.: 3A Page No.: 715-724 January-March 2015

 

INTER-RELATIONSHIP AND VARIABILITY ASSESSMENT AMONG PHYSICAL AND CHEMICAL SOIL PROPERTIES FOR SUSTAINABLE IRRIGATED RICE PRODUCTION IN NIGERIA

 

Abiodun Daniel Olabode

Department of Geography and Planning Sciences, Adekunle Ajasin University (NIGERIA)

 

Received on : November 25, 2014

 

ABSTRACT

 

This paper assessed the physical and chemical properties of irrigated soils at Patigi, Nigeria where bulk of rice production in Kwara State of Nigeria comes from. It further examined the interrelationship and variability of soil properties with a view to identify the influence of soil physical and chemical properties whose proper management can improve and increase rice yield to enhance its demand in the nation and other related environment. Forty composite soil samples were systematically collected at two depths 0-15cm and 15-30cm as top and sub soils respectively. Soil properties that are essential for rice yield were identified and tested for using standard routine laboratory procedures. Sixteen physical and chemical soil elements that are essential in rice cultivation were analyzed. Coefficient of Variation (C.V) and correlation analysis were used to summarize the data. The result of the analysis showed that the least variability of sand is similar to the assumption that the soil physical properties have significant influence on changing situation of pH and nutrient availability. The soils are acidic due to negative correlation of soil pH with sodium (-0.34) and base saturation (-0.36) that increases soil acidity rate. The soil pH of most of the samples (60%) was adequate for decomposition of organic matter that increases the availability of potassium, magnesium and calcium in the soil for rice production. Though the soil pH has negative relationship with available phosphorus (-0.07) indicating careful management of AP in order to sustain its availability for continuous rice growth and development in the study area. It therefore recommended that regular water supply to the farm is essential to ameliorate the low retention capacity of the soil. Also some of the affected soil properties such as AP needed to be managed with consistent application of mineral fertilizers and practice of green manuring for better and continuous rice production in the study area.

 

Keywords : Rice, Production, pH, Soil properties, Coefficient variation

 

 

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