Analysis of Growth and Yield of Winter and Spring Wheats

Interrelationships Among Photosynthesis, Respiration, and Movement of Carbon in Developing Crops

“…Results from work of Davidson and Philip (1958), Watson (1958), Davidson and Donald (1958), and Black (1963) indicated the existence of a definite optimal LAI; but other investigations (Brougham, 1956;Watson, Thorne, and French, 1963;Wang and Wei, 1964;Stoy, 1965;NichiporovichandMalofeyev, 1965;Ludwig,Saeki, and Evans, 1965;Williams, Loomis, and Epley, 1965;Shibles and Weber, 1965;Wilfong, Brown, and Blaser, 1967;) did in general not confirm these conclusions.…”

Development, Differentiation, and Yield

“…The conclusion from cereal experiments such as those of Watson, Thorne, and French (1963) already mentioned has been that yield is closely correlated with leaf area duration after the beginning of grain development. Leaf area duration is related to leaf initiation, growth in area and senescence.…”

“…It would seem, then, that numbers of leaf-bearing nodes is not a highly important factor in itself in cereals, and accordingly that little practical significance attaches to this aspect of the functioning of developmental controls concerned in the transition to flowering. The time of initiation may, however, have some importance, should the correlations of yield with leaf area duration after the beginning of grain development revealedin smaU-grain cereal experiments (Watson, Thorne, and French, 1963;Welbank, French, and Witts, 1966) prevail with wide variation in relative periods of vegetative and reproductive activity at the apex.…”

The Dry Matter Intake and Digestibility of Winter Wheat Harvested as Whole Crop Silage

“…Sci. 57:255-261 (June 1977) lTraduit par les auteulsl ieties (Watson et al 1963) which enable the former varieties to take advantage of earlv spring moisture and growing conditions. There is only limited information available (National Academy of Sciences-National Research Council (NAS-NRC) l97l) on the composition and digestibility of wheat silage ensiled at various stages of maturity, although Tingle and Dawley (1974) and Burgess et al ( 1973) (Table 4) was significantly greater for cows fed milk stage wheat silage than for those fed wheat silage harvested at the soft dough stage of maturity.…”