Manas, 第 24 卷Manas Publishing Company, 1971 |
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第 1 到 3 筆結果,共 82 筆
第 3 頁
... effect on the soil . While nitrate fertilizer , Dr. Commoner says , sus- tains crop growth , " it fails to rebuild the humus nitrogen lost from the virgin soil . " Soil porosity declines , so that less oxygen is available to the roots ...
... effect on the soil . While nitrate fertilizer , Dr. Commoner says , sus- tains crop growth , " it fails to rebuild the humus nitrogen lost from the virgin soil . " Soil porosity declines , so that less oxygen is available to the roots ...
第 4 頁
... effect . Some day we shall probably be a little ashamed of our- selves to think that we once felt it necessary to have the permission of physicists and biologists to reason as Dr. Macintosh has . In any event , we do have this ...
... effect . Some day we shall probably be a little ashamed of our- selves to think that we once felt it necessary to have the permission of physicists and biologists to reason as Dr. Macintosh has . In any event , we do have this ...
第 6 頁
... effect , and national leaders as well as large industrial enterprises with products to sell to the public are selecting themes for use in their advertising cam- paigns and public relations efforts that are intended to dem- onstrate ...
... effect , and national leaders as well as large industrial enterprises with products to sell to the public are selecting themes for use in their advertising cam- paigns and public relations efforts that are intended to dem- onstrate ...
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