Variation in Nectar Volume and Sugar Concentration of Allium ursinum L. ssp. ucrainicum in Three Habitats

Table 4

The effect of flower isolation on nectar concentration at site 3.

	April 27, 2008			May 4, 2010
	𝑛	mean (%)	std	𝑛	mean (%)	std
Covered	50	38.340^∗	4.556	32	33.250	6.754
Uncovered	49	35.898^∗	4.793	23	31.130	2.668
Method	𝑡-test, 𝑃=0.0108			Welch test,𝑃=0.1149

Abbreviations:𝑛: sample size; std: standard deviation; *indicates significant difference between covered and uncovered samples.