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CORRELATION STUDIES OF MINERAL NUTRIENTS’ CONCENTRATIONS IN SOILS AND PINEAPPLE (ANANAS COMOSUS) PLANTS IN THE SOUTHERN AGRICULTURAL ZONE OF CROSS RIVER STATE

D. O. Effiom

Abstract


Nutrient deficiencies were observed to be the primary  factor  affecting  pineapple (Ananas  comosus)  plants growth and development in the southern agricultural zone of Cross River State. Fields experiment were conducted   to evaluate the relationships existing between mineral nqutrients in the soils and pineapple plants. Thirty - two Soil samples were collected within the experimental plots at the depth of 0-30 cm using a soil auger. Thirty- two pineapple plants of 18 months old were equally collected within the same experimental plots.  Randomization method was used for soil and pineapple plants samplings. Samples were labeled and processed for soil and plant laboratory analyses. The parameters analyzed were: Total nitrogen, Available phosphorus, potassium, calcium and magnesium. Their mean concentrations  in the  soils and  pineapple  plants  were: 0.59  %   and  1.22 g kg -1   Total N; 15.53  mg  kg-! and  0.42  g kg-1  Available P and  0.11  cmol  kg -1 and 1.3 g  kg-1 Potassium. Others  means value  were  2.86 cmol kg-1  and  0.86  g  kg-1  Calcium  and  0.75  cmol  kg-1  and  0.52  g  kg-1  Magnesium  respectively. Moreover, the concentrations of other chemical  properties  in  soils were : 0.77 %  organic carbon, 4.5 of  Soil p H, 0.08  of  Exchangeable Sodium  and  65.9  cmol  Kg -1 base saturation. The results  further  revealed  that  total  N ,  K and  Mg associated positively  but weakly  correlated, while Calcium associated positively but  strongly correlated .Available Phosphorus  associated   negatively  but  strongly  correlated between  the  soils and  pineapple plants. The  levels  of  mineral   nutrients’ concentration  in  the  soils at  the experimental plots  were  low,  which  reflected  remarkable in  the  pineapple plants. Inorganic fertilizers such as N. P. K 15:15:15 should be cautiously applied to enhance soil nutrients’ concentration.

Keywords


Soils, Pineapple plants, Mineral nutrients, relationship, Correlation.

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