The experimental material comprised of 50 diverse genotypes were sown in randomized block design with three replications in both timely and late sown condition to study correlation and path coefficient for ten quantitative field traits like days to heading, days to maturity, plant height (cm), spike length (cm), number of tillers per meter row, number of grains per spike,1000 grain weight (g), harvest index (%), biological yield (kg/plot), grain yield (kg/plot) and eight seed parameters viz; seedling length (cm), seed density (g/cc), standard germination (%), seedling dry weight (mg), vigour index I, vigour index II, electrical conductivity (µS/cm/seed) and accelerated ageing at 48 and 72 hours. The grain yield was found to be positively and significantly associated with harvest index, 1000 grain weight and biological yield per plot in both the environments. Characters such as germination per cent, accelerated ageing (48 h, 72 h) and days to maturity were significantly and positively correlated with grain yield under timely sown condition likewise vigour index-I, seedling dry weight and number of tillers per meter were some other traits which had significant positive association with grain yield under late sown condition. Path coefficient analysis indicated that biological yield per plot, harvest index, vigour index-II and seedling length had high positive and significant direct effect in both the environments. Accordingly, emphasis could be given on these traits during selection for varietal improvement programme.

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Nutrient management is one of the prime factors which play a pivotal role on the growth, development and successful completion of life cycle in all green plants. It is very essential to establish alternate and fast growing tree species to meet the raw material demand of various wood based industries. Poplar occupies an important place amongst fast growing species due to their multiple uses as an industrial raw material in pulp and paper. In this study, effect of different spacing (60×60 cm, 70×30 cm and 80×30 cm) and fertilizer levels (N1= N0 P0 K0 (Control), N2= N100 P50 K25, N3= N150 P75 K37.5, N4= N200 P100 K50, N5= N250 P75 K62.5 and N6= N0 P0 K0 + Biofertilizers) on growth of poplar under nursery condition during 2019 and 2020. The performances of growth were influenced by N, P and K at different levels. All the growth characters viz. sprouting per cent, basal diameter, leaf area and total biomass in general increased significantly with increased spacing during both the experimental years. However, plant height and chlorophyll content showed differential response and increased significantly with decrease in spacing. Fertilizer application significantly improved the growth of poplar clones in terms of basal diameter, plant height, leaf area, chlorophyll content and total biomass over control. The performances of growth were influenced by N, P and K at different levels during 2019 and 2020 in poplar nursery were found significantly higher in N200P100K50  and the lowest in control among all the other nutrients levels.  In poplar nursery, the growth was significantly higher for 60 × 60 cm spacing as compared to other spacings of poplar. The highest growth in poplar was registered under the application of N200 P100 K50 with 60×60 cm spacing.