Critical period of weed-crop competition in fennel (Foeniculum vulgare mill)
2007
Mubeen, K.
A field experiment was conducted to find the critical period of weed-crop competition in fennel. Experiment was laid out in Randomized Complete Block Design with four replications. Net plot size was 5m x 1.8171. Crop was sown with the help of a single row hand drill using a seed rate of 25 kg/ha in 30 cm apart rows. Plant to plant distance of 10 cm was maintained by thinning the extra plants. Nitrogen at 57 kg/ha and Phosphorus at 20 kg per ha was applied. Source of fertilizer was Urea and Diammonium Phosphate. Whole of P and N was side placed at sowing with a single row hand drill. The crop received four irrigations viz. first at the completion of germination, second after 15 days of first irrigations, third at flowering and last irrigation was applied at seed development stage. Maximum density of P. minor and C. arvensis was recorded in plots with competition throughout the season & minimum was observed in weed crop competition for 40 days after emergence. Maximum dens
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