Agriculture Reference
In-Depth Information
Rasmussen, J.(1991).Amodel for prediction of yield response in weed harrowing. Weed
Research ,31, 401-8.
Rasmussen, J.(1992 a ).Testing harrows for mechanical control of annual weeds in
agricultural crops. Weed Research ,32, 267-74.
Rasmussen, J.(1992 b ).Experimental approaches to mechanical weed control in field peas.In
Proceedings of the 9th International Symposium on the Biology of Weeds ,16-18 September
1992, Dijon, France, pp.129-38.Paris: European Weed Research Society.
Rasmussen, J.(1993).The influence of harrowing used for post-emergence weed control on
the interference between crop and weeds.In Proceedings of the European Weed
Research Society Symposium , Quantitative Approaches in Weed and Herbicide Research and
their Practical Application , Braunschweig, 1993, pp.209-17.Paris: European Weed
Research Society.
Rasmussen, J., & Svenningsen,T. (1995).Selective weed harrowing in cereals. Biological
Agriculture and Horticulture ,12, 29-46.
Rasmusson, D.D., Dexter,A.G., & Warren, H. iii.(1979).The use of electricity to control
weeds. Proceedings of the North Central Weed Control Conference ,34, 66.
Reese, C., & Forcella, F.(1997). WeedCast User's Manual in MS Word 2.0 for Windows .Internet:
http://www.infolink.morris.mn.US/
lwink/products/weedcast.htm.
Reganold, J.P, Elliott, L.F., & Unger,Y.L.(1987).Long-term effects of organic and
conventional farming on soil erosion. Nature ,330, 370-2.
Roberts, H.A.(1962).Studies on the weeds of vegetable crops. II.Effect of six years of
cropping on the weed seeds in the soil. Journal of Ecology ,50, 803-13.
Roberts, H.A.(1963).Studies on the weeds of vegetable crops. III.Effect of different
primary cultivations on the weed seeds in the soil. Journal of Ecology ,51, 83-95.
Roberts, H.A., & Dawkins, P.A.(1967).Effect of cultivation on the numbers of viable weed
seeds in soil. Weed Research ,7, 290-301.
Roberts, H.A., & Feast, P.M.(1972).Fate of seeds of some annual weeds in different depths
of cultivated and undisturbed soil. Weed Research ,12, 316-24.
Roberts, H.A., & Feast, P.M.(1973 a ).Emergence and longevity of seeds of annual weeds in
cultivated and undisturbed soil. Journal of Applied Ecology ,10, 133-43.
Roberts, H.A., & Feast, P.M.(1973 b ). Changes in the numbers of viable weed seeds in soil
under different regimes. Weed Research ,13, 298-303.
Roberts, H.A., & Hewson, R.T.(1971).Herbicide performance and soil surface conditions.
Weed Research ,11, 69-73.
Roberts, H.A., & Stokes, F.G.(1965).Studies on the weeds of vegetable crops.V.Final
observations on an experiment with different primary cultivations. Journal of
Applied Ecology ,2, 307-15.
Robinson, R.G.(1978).Control by tillage and persistence of volunteer sunflower and
annual weeds. Agronomy Journal ,70, 1053-6.
Robinson, R.G., & Dunham, R.S.(1956).Pre-planting tillage for weed control in soybeans.
Agronomy Journal ,48, 493-5.
Roman, E.S., Murphy, S.D., & Swanton, C.J.(1999).Effect of tillage and Zea mays on
Chenopodium album seedling emergence and density. Weed Science ,47, 551-6.
Röttele, M., & Koch,W.(1981).Verteilung von Unkrautsamen im Boden und
Konsequenzen für die Bestimmung der Samendichte. Zeitschrift für
Pflanzenkrankheiten und Pflanzenschutz , Supplement,9, 383-91.
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