Correlational Study of the Soil Micro-Nutrients Availability and Soil PH of the Flood-Plain Soils of Sokoto Rima River
Abstract
The study was conducted to determine the relationship between soil micro-nutrient and pH level at the up-stream of the flood-plain soils of Sokoto Rima river, determine the relationship between soil micro-nutrient and pH level at the mid-stream of the flood-plain soils of Sokoto Rima river and determine the relationship between soil micro-nutrient and pH level at the down-stream of the flood-plain soils of Sokoto Rima river. The flood-plain was divided into three zones (up-stream, mid-stream and down-stream). Thirty (30) composite samples were collected each from the 3 zones and a total of ninety (90) samples were used for the study. The Soil samples were prepared and analysed for some micro-nutrients using standard laboratory procedures. Routine analysis for Soil texture, Soil pH, organic carbon, CEC, EC, total Nitrogen, available phosphorus, exchangeable potassium, Ca and Mg were carried out. Result of the study indicated that, the soils of the study area were slightly acidic (6.4, 6.2 and 6.1 for up, mid and down-stream respectively) mainly due to leaching, flooding and use of chemical fertilizers such as urea. Copper contents of the mid-stream and down-stream were statistically similar but significantly higher than the up-stream (mean=3.2, mean=4.3 and mean=4.3 mgkg-1). Micro-nutrients were sufficiently supplied in the studied area and their deficiencies are unlikely to occur in the study area. Correlation study to determine the relationship between pH and the micro-nutrients revealed no significant relationship between them. Increased use of organic matter by the farmers will help to maintain the levels of these elements for a long term sustainable Agriculture in the area.
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