RESIDUAL IMPACT OF IRRIGATION SCHEDULING THROUGH CLIMATOLOGICAL APPROACH AND N MANAGEMENT THROUGH DIFFERENT SOURCES ON SOIL FERTILITY IN SUMMER GREEN GRAM

An experiment was carried out during summer seasons of 2020-21 and 2021-22 at Agronomy Farm, Anand Agricultural University, Anand, Gujarat.Experiment was executed in split-split plot design with treatments replicated thrice.Results revealed that soil parameters such as electric conductivity, pH, organic carbon, soil available nitrogen, phosphorus, available potassium, microbial count in soil after harvest of green gram were varied by residual IW/CPE based irrigation scheduling treatments and nitrogen management treatments.Among treatments of residual nitrogen management, 100% RDN from vermicompost had significant influence on soil available nitrogen, phosphorus and potassium, microbial count and organic carbon.The same parameters were enhanced by 100% RDN in greengram over no RDN.There was highly positive correlation between microbial count with available nitrogen content in soil (80.13%, 92.28% and 90.3% during first year, second year, on pooled analysis, respectively).Thus, optimizing irrigation scheduling and adopting balanced nitrogen management practices will help to enhance soil fertility maintain soil health further to sustainable production in long run.