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Wareing & Foda (1957), Kaul (1965), Weaver &

Lechowicz(1983)

Lechowicz(1983)

Notes:

" +,—, and 0 indicate that the factor promoted, inhibited or had no effect on germination in the studies cited. Parentheses indicate that the effect was weak.

Blanks indicate that information was unavailable.

6 H, hard seeds; W, wounding increases germination, but seeds are not hard in the usual sense.

Table 2.5. Half-life and annual loss of seeds from soil for 20 weed species, computed from seed survival over a five-year perioda

Table 2.5. Half-life and annual loss of seeds from soil for 20 weed species, computed from seed survival over a five-year perioda

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