Effect of Seed Grading on Germination Pattern of some Multi-purpose Tree Species of Jammu Region

A study was conducted in Seed Laboratory of Seed Development Division , Jammu to investigate the effect of seed grading , by size and weight , on germination of four multipurpose tree species , viz. Acacia catechu , Pinus roxburghii , Albizia lebbek and Robinia pseudoacacia. The results have shown that medium sized seed grade gave higher values of initial germination , total germination and germination values for all the species studied , except in case of Robinia pseudoacacia , where comparative values of total seed germination were recorded for small and medium sized seed grades. Grading of seeds before sowing is recommended to obtain uniform nursery stock in these species.