نتایج جستجو برای: sunflowers
تعداد نتایج: 370 فیلتر نتایج به سال:
The relative contribution of advantageous and neutral mutations to the evolutionary process is a central problem in evolutionary biology. Current estimates suggest that whereas Drosophila, mice, and bacteria have undergone extensive adaptive evolution, hominids show little or no evidence of adaptive evolution in protein-coding sequences. This may be a consequence of differences in effective pop...
A sunflower with $r$ petals is a collection of sets so that the intersection each pair equal to all them. Erd?s and Rado proved lemma: for any fixed $r$, family size $w$, at least about $w^w$ sets, must contain petals. The famous conjecture states bound on number can be improved $c^w$ some constant $c$. In this paper, we improve $\mathrm{log}\ w)^w$. fact, prove result robust notion sunflowers,...
Urine contains high concentrations of nitrogen and phosphorus, which can be utilized as fertilizer in sustainable agriculture, forestry, landscaping. Before urine application, the stabilized with calcium hydroxide (lime), raises pH inhibits urea hydrolysis. However, impact lime-treated on plants soils remains unclear. Here, diluted 1:10 water was applied to sunflowers (Helianthus annuus L.), gr...
ABSTRACT Knowledge of how climatic conditions affect plant morphophysiology is essential for understanding to manage the growth cycles different crops. The aim this study was evaluate effects growing seasons in a semi-arid area on morphophysiological variables ornamental sunflower plants. experiment carried out randomized block design split-plot arrangement with four replicates. Six cultivars (...
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