بررسی قدرت رقابتی ارقام گندم نان آزاد نو طی سالهای 1335 تا 1376 در مقابل علف هرز یولاف وحشی

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yield since 1900 and associated ahysiological ahanges. Journal of Agricultural Science,
94: 675-689.
Blackshaw, R. E. 1994. differential competitive ability of winter wheat cultivars against
downy brome. Agronomy Journal, 86: 649–654.
Barens, P. W., Beyschlag. W., Rayel, R. et al. 1990. Plant competition for light analysed
with a multispecies model. III. Influence of canopy structure in mixtures and
monocultures of wheat and wild oat. Oecologia, 82: 560-566.
Calderini, D. F., Dreccer, M. F. and Slafer, G. A. 1997. Consequences of breeding on
biomass, radiation Interception and radiation use efficiency in wheat. Field Crops
Research, 52: 271-281.
Cavero, J., Zaragoza, C., Suso, M.L. and Parado, A. 1999. Competetion between maize and
Datura strumanium in an irrigated field under semi-arid conditions. Weed Research,
39: 225-240.
Christensen, S., 1995. Weed suppression ability of spring barley varieties. Weed Research,
35: 241–247.
Cruze, P. A. and Sinoquet. H. 1994. Competition for light and nitrogen during a regrowth
cycle in tropical forage mixture. Field Crop Research, 36: 21-30.
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Journal of Agricultural Science. 91: 47-60.
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