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A Botanical Survey of the Sugar Grove Region Volume 1 by Robert Fiske Griggs - Paperback
79.80 درهم

A Botanical Survey of the Sugar Grove Region Volume 1 by Robert Fiske Griggs - Paperback

كن أول من يقيِّم هذا المنتج 

79.80 درهم 

  - ستوفر -79.80 درهم
الأسعار تشمل ضريبة القيمة المضافة  التفاصيل
الشحن مجاني التفاصيل
رقم ال ISBN
9781130071481
الفئات
تاريخ
الكاتب
Robert Fiske Griggs
الناشر
Rarebooksclub.com
الوصف:

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ... the axis is north and south the light received on the two sides must be equivalent and there can be but slight difference in the amount of rainfall. The soil being residual derived ...

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حالة السلعة:
جديدة
البائع:
InternationalBookStore (87% تقييم ايجابي)

معلومات المنتج

  •  

    المواصفات

    رقم ال ISBN
    9781130071481
    الفئات
    تاريخ
    اللغات
    الانجليزية
    الرقم المميز للسلعة
    2724353106216
    المؤلفين
    الكاتب
    Robert Fiske Griggs
    رقم ال ISBN
    9781130071481
    الفئات
    تاريخ
    اللغات
    الانجليزية
    الرقم المميز للسلعة
    2724353106216
    المؤلفين
    الكاتب
    Robert Fiske Griggs
    المؤلفين
    الناشر
    Rarebooksclub.com
    معلومات تقنية
    غلاف الكتاب
    غلاف عادي
    اللغات والبلدان
    لغة الكتاب
    الانجليزية
    إقرأ المزيد
  •  

    الوصف:

    This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ... the axis is north and south the light received on the two sides must be equivalent and

    This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ... the axis is north and south the light received on the two sides must be equivalent and there can be but slight difference in the amount of rainfall. The soil being residual derived from the weathering of the same rocks cannot have differed, in the beginning at least, in any important respect on the two sides. The only obvious difference between the two slopes is the condition of the surface of the ground. The west slope is covered Avith a desp carpet of fallen leaves and leaf mold while the opposite slope is swept bare of leaves by the wind so that there is little or no humus formed and the ground is somewhat more exposed to erosion from surface runoff. The soil of the west bank gives a neutral or faintly acid reaction to litmus paper. That of the east bank, on the other hand, gives a very strong and almost instantaneous red reaction. This is remarkable in view of the abundance of organic remains which must liberate various acids in course of humification in the neutral soil while the opposite acid bank is free from any such source of acidity. Repeated tests throughout the area have uniformally shown that wherever the characteristic upland forest develops, there the soil gives a strongly acid reaction to litmus paper. The soil of the lowland forest, on the other hand, always gives a faintly acid or neutral reaction to the same test. Although such conditions have often been ignored in American ecological papers, they are clearly recognized in Europe. Warming in his "Ecology, '" for example, speaks of the importance of sour humus again and again. On page fi2 he describes conditions practically identical with those found in the Sugar drove region as follows: "Raw (sour) humus appears in forests, especially in places exposed to wind, while ordina.

    خصائص المنتج:
    • الفئات: تاريخ
    • غلاف الكتاب: غلاف عادي
    • لغة الكتاب: الانجليزية
    • الكاتب: Robert Fiske Griggs
    • الناشر: Rarebooksclub.com
    • رقم ال ISBN: 9781130071481
    • عدد الصفحات: 34
    • لأبعاد (الارتفاع*العرض*العمق): 9.69 x 7.44 x 0.07 inches
 

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