Content of sulphur in fir needles as indicator of its health condition
1985
Zawada, J. | Matuszczyk, I. (Instytut Badawczy Lesnictwa, Warszawa (Poland))
It was stated in the result of infestigations carried out that the content of sulphur in one-year-old needles of fir collected at the end of vegetation period amounting to 0.140% and more indicates a serious impairement of fir trees. The content of sulphur ranging between 0.110 and 0.130% occurs more frequently in strong fir trees much less weakened. It was found that the differentiation of sulphur content in 2-year-old needles was minimal and that those values were not being fit for comparisons
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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