School Nature Study, Volume 33, Issue 133 - Volume 40, Issue 157G. Philip and Son, 1938 - Natural history |
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Page 101
... Weeds found on the grassland before digging . These weeds should give some clue as to the nature of the soil on which they grow . ( b ) Analysis of the soil . While the soil is being trenched , samples could be taken and the percentage ...
... Weeds found on the grassland before digging . These weeds should give some clue as to the nature of the soil on which they grow . ( b ) Analysis of the soil . While the soil is being trenched , samples could be taken and the percentage ...
Page 3
... weed seedlings . It is this faculty of dormancy which makes it so important that weeds shall not be allowed to ripen seeds , as a single seeding lays up trouble for many years ahead . Comparatively little is known of the real facts ...
... weed seedlings . It is this faculty of dormancy which makes it so important that weeds shall not be allowed to ripen seeds , as a single seeding lays up trouble for many years ahead . Comparatively little is known of the real facts ...
Page 4
upright weeds , however , as poppy , shepherd's needle , corn chrysanthemum , black bent and may- weed do not start flowering till the winter is over , thus allowing a longer period of grace between after - cultivations . In another ...
upright weeds , however , as poppy , shepherd's needle , corn chrysanthemum , black bent and may- weed do not start flowering till the winter is over , thus allowing a longer period of grace between after - cultivations . In another ...
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animals apparatus aquaria Ashridge Ashridge Close Aucuba autumn B.Sc bees birds botanical British buds butterflies carbon catkins chalk collecting colour common crops D.Sc dissections eggs experiment female Field Club films flora flowers fruits gas jar germination grass grass snake green grey growing growth HIBBERT-WARE hive illus illustrated inches insects interest Kew Gardens lantern slides large number larvæ leaf leaflets leaves Living and preserved London M.Sc male marsh tit Microscopes moths mounting wild Natural History Nature Study Union nest observation obtained Pentonville Road photographs plants plot pollination pond post free Price published pupa R. F. SHOVE roots rubber School Nature Study season seedlings seeds seen shoots soil species specimens spores squirrels stamens starch stem stick insects summer supply surface teachers tree tube twigs usually VON WYSS wild wings winter wood WYSS yellow young zoological