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According to the duration of dormancy, 3 different classes could be recognized among African accessions. Material originating in the low-rainfall trop...
Read morePopulation models that are used to predict weed population dynamics or the impact of control measures on weed abundance typically ignore temporal vari...
Read morePure swards of S48 timothy and S215 meadow fescue, grown from seed in large concrete containers out of doors, were cut (a) every 4 weeks during summer...
Read moreData are presented and discussed on seed germination, seedling emergence, seedling mortality, leaf production and shoot growth for the economically va...
Read moreMeasurements were made of the length and disposition of all branches on young trees of P. contorta (a) planted in Peeblesshire, Scotland, in 1966, and...
Read moreGrowth characteristics and response to atrazine were studied in atrazine resistant (R) and susceptible (S) populations of Amaranthus retroflexus and A...
Read moreMixtures of equal numbers of plants of different barley varieties or of a barley variety and an oat variety were grown in 5 field trials and 1 glassho...
Read moreThis paper discusses the recognition, protection and utilization of the wild relatives of domesticated crops that naturally occur in Arizona (USA), wh...
Read moreA reconstruction of rate of spread, frontal-fire intensity and fuel consumption for the Galatea fire of Aug. 1936 in the Alberta foothills of the Cana...
Read moreDiurnal movements of heads and leaves of sunflower cv. Hysun 30 were determined from 3-dimensional maps of the organs. Dirunal E.-W. oscillations of t...
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