QUESTION: We are application railroad ties for a bound about vegetable beds on a moderately angled hill. From their appearance, it is axiomatic that they are heavily treated. A acquaintance from Germany was anxious about the analysis leaching into the clay and affecting the plants. Is my friend’s affair valid?
–J.R., Palos Verdes
ANSWER: Although bodies accept been application railroad ties for years to authority aback hills and accomplish aloft beds, I would not use them a vegetables. Any actual that prevents copse from adulteration cannot be acceptable for the vegetables or you.
Railroad ties accept been advised with creosote, which is toxic, said Garn Wallace at Wallace Laboratories, a clay and bulb testing account in El Segundo. He acicular out that creosote is a copse tar, so it is an amoebic admixture that will decompose and blow in time, but afresh the copse begins to rot.
Wood advised with chromated nut arsenic, frequently alleged “pressure-treated,” additionally leaches baneful materials, including arsenic, alone these are minerals that aftermost a continued time in the soil. Amoebic Gardening annual researched pressure-treated copse and the cessation was that no blazon of chemically advised copse should be acclimated a edibles.
Better bets for vegetable beds are accustomed redwood or cedar boards, or accurate blocks, admitting new accurate will bleed calcium hydroxide into the clay for about six months, which inhibits bulb
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