EFFECT OF SOME AGRONOMIC FACTORS ON THE HEMP (CANNABIS SATIVA L.) YIELD

We investigated the agronomic factors how could influence the yield of hemp. The effects of nutrient supply in soil four N,P,K levels, influence of plant density 360 and 240 germs ha(-1), effect of harvest times at full floering and seed ripening time were determined in different field experiments between 1990 and 2006 on chernozem meadow soil. The main effect of N, P, K (on the average of other two treatments) consequently were N 18-26 %, P 1%, K 2-5 %, with 80-160 kg ha(-1) N, at soil phosphate P, level (AL-P2O5 110-130 mg kg(-1)) and at potassium K, (AL K2O 300-360 mg kg(-1)) level, with 100 kg ha(-1) phosphate fertilisation and with 300 kg ha(-1) potassium fertilisation. Density effect on the yield was 20 % at higher, 360 germs m (2-1) treatment on the average of three genotypes. Stem yield increased with 80 % from flowering time to seed ripening.