منابع برچسب گذاشته شده توسط: Ph
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2011/07/20 Rudy Poglitsh, Former intern working in Swaziland, sent in a question about health of Avocado trees. The problem seemed to be low pH. "We have about 18 avocado trees in the ground. Almost all of them are over five feet tall. The soil is very poor, and the leaves are a pale green/yellow. We are...