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導電度（electrical conductivity, E.C）

水質檢驗與土質檢驗時，都會有一個導電度（electrical conductivity, E.C.）的資料，這篇文章找到了中山大學與農試所的資料，分別介紹水導電度與土壤導電度對農業的影響。

簡單說，導電度就是導電能力強弱的指標。大多數的無機酸、鹼以及鹽類均是很好的導電體，所以導電度高的水，要不就是太酸、要不就是太鹼，或者是含有大量的鹽類，這都不是合適的灌溉水。

至於土壤的導電度，它是土壤滲透壓的指標，滲透壓太高會導致土壤水滲透壓過高，植物的根無法正常吸收水分，嚴重則會造成植物枯死。
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Oh! Snake

沒有例外的，凡是希望投入自然農耕的新手都會問這個問題「遇到蛇該怎麼辦？」台師大的杜銘章老師這篇文章我很推薦。

原文出處：遇到蛇該怎麼辦？撰文／杜銘章（臺灣師範大學生命科學系教授）

臺灣的蛇種類繁多，不論是在野外或是在家中，遇到蛇總叫人不知所措。其實蛇並不會主動攻擊人，而且，你還可以和牠們成為好朋友喔！

遇到蛇該怎麼辦？這個問題顯示了人們對蛇的恐懼和認識不足。的確，有些蛇確實需要敬畏，但能嚴重傷人的毒蛇畢竟是少數，而且蛇傷人大都是因為出於自衛，在沒有被碰觸或強烈干擾的情況下，蛇和其他的動物一樣，不會主動攻擊看起來比牠大許多的動物。人類在蛇的眼中可是龐然巨獸，我們怕蛇，其實牠們更怕我們。因此，遇到蛇時，其實可以很輕鬆的處理，比較需要注意的是，避免讓自己在不知不覺的情況下侵犯到蛇。Read More »Oh! Snake

This, too, Will Pass

A powerful king, ruler of many domains, was in a position of such magnificence that wise men were his mere employees. And yet one day he felt himself confused and called the sages to him.

Said “I do not know the cause, but something impels me to seek a certain ring, one that will enable me to stabilize my state.

“I must have such a ring. And this ring must be one which, when I am unhappy, will make me joyful. At the same time, if I am happy and look upon it, I must be made sad.”

The wise men consulted one another, and threw themselves into deep contemplation, and finally they came to a decision as to the character of this ring which would suit their king.

The ring which they devised was one upon which was inscribed the legend:

This, too, will pass.

— Sufi Stories, told by Idries Shah

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