Science, Том 58American Association for the Advancement of Science, 1923 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Стр. 20
... matter of common knowledge that the results of sci- ence are respected from whatever quarters of the world they come because they are not personal . Men guard the products of their experimentation and thinking with about the same ...
... matter of common knowledge that the results of sci- ence are respected from whatever quarters of the world they come because they are not personal . Men guard the products of their experimentation and thinking with about the same ...
Стр. 78
... MATTER IN SOILS NONE of the hypotheses for the origin of the earth make any provision for the presence of combined nitrogen in the lithosphere . All productive soils , however , contain this element in some form generally closely ...
... MATTER IN SOILS NONE of the hypotheses for the origin of the earth make any provision for the presence of combined nitrogen in the lithosphere . All productive soils , however , contain this element in some form generally closely ...
Стр. 79
... matter proportional to the increase in nitrogen must and does follow and the 1:12 nitrogen - carbon ratio is maintained . It is only under conditions of intensive tillage where excessive amounts of nitrogen are removed regularly by crop ...
... matter proportional to the increase in nitrogen must and does follow and the 1:12 nitrogen - carbon ratio is maintained . It is only under conditions of intensive tillage where excessive amounts of nitrogen are removed regularly by crop ...
Содержание
Acidity Subsoil A P KELLEY 36 | 13 |
Quotations 14 32 50 92 109 121 142 162 181 206 | 14 |
VOL LVIII | 20 |
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