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SummaryXanthium pensylvanicum plants were rotated around a horizontal axis at 0.25 rpm. The stem growth, and flowering response… Expand Summary 1 We measured whole-plant survival, frequency of leader (mainstem terminal bud) damage among survivors and growth… Expand Abstract: Dose–response curves for acetochlor with and without timely rotary hoeing (two passes) were derived for corn (Zea mays… Expand Variation in the performance of 20 genotypes of Polygonurn pensylvanicum under two nutrient treatments was studied in a garden… Expand The effects of common cocklebur (Xantbium pensylvanicum Wallr.) on soybean (Glycine max (L.) Merr. 'Wells') development and seed… Expand To determine the competitiveness of common cocklebur (Xantbiurn pensylvanicum Wallr.) with cotton (Gossypium hirsutum L… Expand Bunning suggested that circadian rhythms provide the basis for time measurement in the photoperiodic responses of plants (2). A… Expand chloride and sulfate salts in plants. J. Agr. Res. 64: 357-99. 9. ESAU, K. 1953. Plant Anatomy. John Wiley and Sons, New York. 10… Expand