CORRELATION STUDIES OF MINERAL NUTRIENTSâ€™ CONCENTRATIONS IN SOILS AND PINEAPPLE (ANANAS COMOSUS) PLANTS IN THE SOUTHERN AGRICULTURAL ZONE OF CROSS RIVER STATE
Nutrient deficiencies were observed to be the primaryÂ factorÂ affectingÂ pineapple (AnanasÂ comosus)Â plants growth and development in the southern agricultural zone of Cross River State. Fields experiment were conductedÂ Â 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.Â 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 concentrationsÂ in theÂ soils andÂ pineappleÂ plantsÂ were: 0.59Â % Â Â andÂ 1.22 g kg -1Â Â Total N; 15.53Â mgÂ kg-! andÂ 0.42Â g kg-1 Â Available P andÂ 0.11Â cmolÂ kg -1 and 1.3 gÂ kg-1 Potassium. OthersÂ means valueÂ wereÂ 2.86 cmol kg-1Â andÂ 0.86Â gÂ kg-1Â CalciumÂ andÂ 0.75Â cmolÂ kg-1Â andÂ 0.52Â gÂ kg-1Â MagnesiumÂ respectively. Moreover, the concentrations of other chemicalÂ propertiesÂ inÂ soils were : 0.77 %Â organic carbon, 4.5 ofÂ Soil p H, 0.08Â ofÂ Exchangeable SodiumÂ andÂ 65.9Â cmolÂ Kg -1 base saturation. The resultsÂ furtherÂ revealedÂ thatÂ totalÂ N ,Â K andÂ Mg associated positivelyÂ but weaklyÂ correlated, while Calcium associated positively butÂ strongly correlated .Available PhosphorusÂ associatedÂ Â negativelyÂ butÂ stronglyÂ correlated betweenÂ theÂ soils andÂ pineapple plants. TheÂ levelsÂ ofÂ mineralÂ Â nutrientsâ€™ concentrationÂ inÂ theÂ soils atÂ the experimental plotsÂ wereÂ low,Â whichÂ reflectedÂ remarkable inÂ theÂ pineapple plants. Inorganic fertilizers such as N. P. K 15:15:15 should be cautiously applied to enhance soil nutrientsâ€™ concentration.
Soils, Pineapple plants, Mineral nutrients, relationship, Correlation.
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