Sowden, Jane2022-10-052022-10-051978https://hdl.handle.net/10182/15503Studies to measure the effects of cultivation, cover, nitrogen fertiliser, depth of burial, fluctuating temperature, light and harvest date on germination and establishment of yarrow seedlings were carried out in field, pot and laboratory trials at Lincoln College, 1978. In the field numbers of established seedlings in uncultivated treatments were 5 times those cultivated following sowing. Seedling establishment was greater in short (5 cm) barley stubble than long (40 cm) although there was no effect of these treatments on plant dry weight.The only response to nitrogen was an increase in plant numbers with increase in nitrogen level, in the cultivated treatments. Where seed was buried in pots at a range of depths to 8 cm, the only significant establishment occurred.from that sown on the soil surface. Germination of freshly harvested seed was 37% in darkness increasing with light to 85%, and increasing still further to 90% with fluctuating temperature. Germination was greater in May harvested and germinated seed than that harvested and germinated in March, however greatest germination was in March from 1976 harvested seed. Presence of rhizomes was first noted in field plants 18 weeks from sowing.38 pagesenhttps://researcharchive.lincoln.ac.nz/pages/rightsyarrowseed germinationfertiliserseed productionDissertationDigital thesis can be viewed by current staff and students of Lincoln University only. If you are the author of this item, please contact us if you wish to discuss making the full text publicly available.ANZSRC::300802 Horticultural crop growth and development