Influence of drip irrigation scheduling and nitrogen levels on yield and nutrient uptakes of okra (Abelmoschus esculentus L.)

A field experiment was conducted at Water Technology Centre, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad during summer 2020-21 on “Optimization of irrigation and nitrogen levels under drip fertigation in okra (Abelmoschus esculentus l.) during summer” 2020-21. The experiment was laid out in a split-plot design with Radhika hybrid (40 cm x 45 cm) and replicated thrice. The treatments comprise of three irrigation levels through drip scheduled at 0.75 Epan, 1.0 Epan and 1.25 Epan as main-plots and four nitrogen levels viz., 75% RDN (112.5 kg N ha^-1), 100% RDN (150 kg N ha^-1), 125% RDN (187.5 kg N ha^-1) and 150% RDN (225 kg N ha^-1) as sub-plots. Experimental soil was sandy clay in texture, alkaline in reaction, medium in organic carbon content, low in available nitrogen, high in available phosphorous and available potassium, respectively. The results indicated that, the highest yield and accumulation of nutrient (kg ha^-1) and its content was highest under drip irrigation scheduled at 1.0 Epan treatment. Among the nitrogen level the highest nutrient accumulation (kg ha^-1) and its content (%) was recorded at 100% RDN (N₂) treatment. The crop irrigation scheduled at 1.0 Epan in conjunction with 100% RDN (I₂N₂) recorded maximum N uptake in okra.