PAPER TITLE :POTASSIUM THERMODYNAMICS AS AFFECTED BY IRRIGATION, ORGANIC AND INORGANIC AMENDMENTS IN AN EUTRIC CAMBISOL SOWN TO MAIZE IN KANO, NIGERIA

APPLIED TROPICAL AGRICULTURE | VOLUME 23 NUMBER 1 2018

Paper Details

  • Author(s) : Dawaki, M.U., Shehe, S.M., Lado, A., Lawan, B.A., Galadanci, U.F. and Mustapha, A.A.
  • Abstract:

A Trial under irrigation was conducted at Kano, Nigeria to evaluate the effects of irrigation and soil amendment type on K thermodynamics in Maize field. Split plot design was used with a factorial arrangement of 12 treatments in 3 m x 2 m plots. The experimental factors were irrigation intervals at 3 days (I3), 5 days (I5) and 7 days(I7); and soil amendments (5 tha-1 equivalent of Biochar or Compost; NPK at the equivalent of 120:60:60 and Control. Bulk soil (root-free soil) was sampled at seedling and tasseling between maize stands and subjected to analyses. K thermodynamics were determined using Quantity/Intensity approach. Linear curves with high significant correlation coefficient values (r = 0.98 – 0.99) were obtained from the Q/I experiment which is an indicator of the less significant role that high K affinity sites have in K exchange in the amended soils. The effect of the soil amendments on K Q/I parameters such as labile K, ARKe, PBCK, and pF were varied but statistically significant at 5% level of significance. The effect of irrigation interval, was varied but not statistically significant. The results portrayed the potency of especially organic soil amendments to enhance K availability and exchange within a season.  
Key words: Amendments, Irrigation, Potassium, Soil, Thermodynamics