Mohinder SinghMay May Khin2016-11-232016-11-232007http://krishikosh.egranth.ac.in/handle/1/87168A pot culture experiment in screen house was conducted with four levels each of P and S i.e., 0, 30, 60 and 90 mg kg-1 soil to study the interaction of P and S in maize (cv HQPM 1). The dry matter yield of maize significantly increased with 60 mg P kg-1 soil and 30mg S kg-1 soil application. P x S interaction was synergistic at their lower levels and antagonistic at their higher levels on dry matter yield of maize. Concentration and uptake of P significantly increased with the application of P and S. The highest concentration was recorded with the combined application of 90 mg P kg-1 soil and 30 mg S kg-1 soil, whereas, the highest P uptake was observed with combined application of 60 mg P kg-1 and 30mg S kg-1 soil. Concentration and uptake of S significantly increased at 30mg P kg-1 and 60 mg P kg-1 soil, respectively. The concentrations of Ni, Zn, Fe, Mn and Cu significantly decreased with increasing levels of applied P and S, whereas, their uptake increased significantly upto 60mg P kg-1 soil and 30 mg S kg-1 soil. Another pot culture experiment in screen house was conducted with four levels each of P and Ni i.e. 0, 30, 60 and 90 mg P kg-1 soil to study the interaction of P and Ni in maize (cv HQPM 1). The dry matter yield of maize significantly increased with all levels of applied P and 30 mg Ni kg-1 soil application. P x Ni interaction was significant in dry matter yield of maize. The adverse effect of Ni on dry matter yield was considerably ameliorated with the higher doses of P application. Higher application of P significantly increased the P concentration and uptake but decreased the S and Ni concentration in maize. Higher application of Ni significantly increased the Ni concentration and uptake but decreased the P and S concentration and uptake. The concentrations of Zn, Fe, Mn and Cu significantly decreased with the increasing levels of applied P and Ni, whereas, their uptake increased significantly upto 60 mg P kg-1 soil and at 30mg Ni kg-1 soil. Another pot culture experiment in screen house was also conducted with four levels of each of S and Ni i.e. 0, 30, 60 and 90 mg kg-1 soil to study the interaction of S and Ni in maize (cv HQPM 1). The dry matter yield of maize significantly increased at 30 mg S kg-1 soil and 30 mg Ni kg-1 soil only. The concentration and uptake of S significantly increased with increasing levels of S but it significantly decreased with increasing levels of Ni. The concentration of P significantly increased at 30 mg S kg-1 and decreased with increasing levels of Ni. The concentrations of Ni significantly decreased with increasing levels of S but its uptake significantly increased at 30 mg S kg-1 soil. The concentrations of Zn, Fe, Cu and Mn significantly decreased with increasing levels of applied S and Ni, whereas, their uptake increased significantly at 30 mg S kg-1 soil and 30 mg Ni kg-1 soil. The successive application of P, S and Ni significantly increased available P, available S and DTPA extractable Ni, respectively, in post harvest soil samples. The application of P significantly decreased available S and DTPA extractable Ni in post harvest soil samples. The application of S significantly decreased the available P and DTPA extractable Ni, whereas, application of Ni significantly decreased the available P and S in post harvest soil samples.enPhosphorus, Sulphur, Nickel, Interactions, Maize cropThesis