. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 121. Variation in height and » stooling power. This is not due entirely to the inherent tendency of the plant to remain in bloom for a long or a short period, but is influenced to some extent by climatic conditions. For example, since the plants bloom only when conditions of tempera- ture and humidity are favorable, a few cold, wet days followi
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 121. Variation in height and » stooling power. This is not due entirely to the inherent tendency of the plant to remain in bloom for a long or a short period, but is influenced to some extent by climatic conditions. For example, since the plants bloom only when conditions of tempera- ture and humidity are favorable, a few cold, wet days following the beginning of bloom would delay the appearance of the remainder of the flowers, thus materially lengthening the blooming period. Variation in longevity.—Plants ••• ave been observed which behaved as annuals; , after producing seed at the end of the first season they died from no apparent external cause. Others survived for only two or three years. On the plats which have been preserved, a large per- centage of the plants, which are now nearly 6 years old, are still in existence and appear to be as large and vigorous as ever. Variation in vigor.—Plants may be found which show a decided lack of vigor. These plants often succumb to the influences of unfavorable environmental conditions, though it does not necessarily follow that low vigor is always associated with lack of hardiness Variation in stooling power.—Some plants send up but very few culms while others produce a large number, as many as 280 having been counted on a single plant. To what extent this is associated with vigor is difficult to determine, but it is plainly evident from an inspection of a large number of vigorous plants that there is a marked difference in the inherent tend- ency of the plants to produce culms. Variation in disease resistance.—The severe attacks of a "rust" (Puccinia graminis) during the past two seasons have afforded an opportunity to ob- ^^^ ^^^ Variation in
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