The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 380
... plant from drying . Lignier's theory was purely speculative ; nonetheless , fossils of early vascular plants have been found that ac- cord with the theory sufficiently well that some enthusi- asts have credited Lignier with describing ...
... plant from drying . Lignier's theory was purely speculative ; nonetheless , fossils of early vascular plants have been found that ac- cord with the theory sufficiently well that some enthusi- asts have credited Lignier with describing ...
Page 497
... plant breeding in recent years . Uniformity of plant characters is very im- mechanized portant in mechanized agriculture because field opera- agriculture tions are much easier when the individuals of a variety are similar in time of ...
... plant breeding in recent years . Uniformity of plant characters is very im- mechanized portant in mechanized agriculture because field opera- agriculture tions are much easier when the individuals of a variety are similar in time of ...
Page 500
... plant breeder is to develop new varieties , he usually also carries out an initial small - scale seed increase . Such seed is called breeders seed . The next stage is the multipli- cation of breeders seed to produce foundation seed ...
... plant breeder is to develop new varieties , he usually also carries out an initial small - scale seed increase . Such seed is called breeders seed . The next stage is the multipli- cation of breeders seed to produce foundation seed ...
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activity America animals appear areas atoms became become body called camera century changes characteristics chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost personality pest Peter petroleum Philip philosophy photographs plants political position possible practice present printing problems production Quakers range region result rocks similar social South species structure surface temperature theory tion United usually widely