New Zealand Plant Protection 53 (2000): 28-33
Effect of cultivation methods on weed seed distribution and seedling emergence
A. Rahman, T.K. James, J. Mellsop and N. Grbavac
ABSTRACT
The influence of four cultivation treatments viz. ploughing, rotary hoeing, power harrowing and no soil disturbance, on the distribution of weed seeds in the soil profile was investigated in a field trial. Weed seeds were counted by dry sieving soil samples collected from 0-5, 5-10, 10-15 and 15-20 cm depths. The density and species of weeds that emerged in field plots were also recorded at three-weekly intervals. Samples from undisturbed plots showed a linear decline with depth. Ploughing was the only treatment that caused a significant shift of seeds to the deeper profile. Ploughed plots had significantly fewer weed seedlings than other treatments, due to lower numbers of both summer grasses and broadleaf weeds. Undisturbed plots contained significantly fewer broadleaf species, and weed emergence was delayed. Implications of these results for seedbank sampling methodology and weed management strategies are discussed.
Keywords: weed seedbank, cultivation, weed emergence, ploughing, rotary hoeing.
Copyright © 2000 New Zealand Plant Protection Society (Inc.).
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 | Optimising time of planting and herbicide aplication for control of problem weeds in maize T.K. James, A. Rahman and M. Trolove (2007) New Zealand Plant Protection 60: 183-188 |
| Predicting broadleaf weed populations in maize from the soil seedbank A. Rahman, T.K. James, J.M. Mellsop and N. Grbavac (2004) New Zealand Plant Protection 57: 281-285 |
| Relationship between soil seedbank and field populations of grass weeds in maize A. Rahman, T.K. James, J.M. Mellsop and N. Grbavac (2003) New Zealand Plant Protection 56: 215-219 |
© 2007 New Zealand Plant Protection Society (Inc.)