Text Appearing Before Image: Bulletin 218) CALIFORNIA PLANT DISEASES. 1087 troubles. Lack of soil fertility is frequently a contributory factor. Such cases of die-back are connected usually with some of the unfavor- able soil conditions which we have described in connection with that Text Appearing After Image: Fig. 14.—Apple twig affected by mildew (Podosphaera oxyacanthae). subject. In the majority of cases these plantings were doomed to failure from the start and represent an ill-advised undertaking, or in some cases criminal deception. Various secondary causes may contribute to the
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الرجاء إضافة المزيد من وسوم حقوق الطبع والنشر لهذه الصورة إذا أمكن تحديد معلومات أكثر تحديدا عن حالة حقوق الطبع والنشر، انظركومنز:ترخيص لمزيد من المعلومات.
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