DOWN TO EARTH

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Beware what you put into your soil; it could include more harmful ­chemicals than you think.

I’VE ALWAYS TRIED to garden ­organically. I don’t use chemical sprays on my herbs and vegetables, I resist using chemical fertilizers unless there is no other alternative, and for the most part, I rely on my compost pile for soil amendments. So I read with ­interest an article in an organic gardening magazine some years back about building soil by taking advantage of all the free stuff available in the countryside. The author suggested that readers could haul off truckloads of chicken litter from the big, commercial chicken houses and harvest cotton hulls from roadside ditches in areas where cotton is grown.

Because I knew that both of these suggestions were unacceptable, I called the magazine’s editor to ask why it was calling these sources organic. She seemed surprised I’d asked. “Chicken litter is just manure and feathers and some sawdust from the floor,” she told me. I live in the top poultry-producing state in the United States, and I know that not one organic organization certifies the use of chicken litter for organic herb and vegetable growers. I ­explained that chicken litter can contain insecticides and other toxic chemicals that may persist in the soil if the litter is tilled in as an amendment. An insecticide added to the feed of chickens and turkeys raised commercially for meat reportedly doesn’t break down in the bird but passes through it into the manure, where it is then activated and kills fly larvae. The chemical may persist in the manure for many months and may be harmful to plants growing in soil on which the manure has been spread.

The editor then focused on the cotton hulls, saying that she had driven through cotton-growing areas and seen the piles of cotton hulls that had washed down the rows into roadside ditches after a rain. I had checked that out with a couple of cotton growers, one in Arkansas and one in Tennessee, and I had done some library research as well. All three sources agreed that the three most heavily sprayed crops in all of agriculture are ­cotton, tobacco, and ­soy-beans. A third cotton grower, who uses relatively inorganic methods, hooted at the idea of ­collecting cotton hulls. “Do you know how many chemicals—really harsh, toxic chemicals—we have to use to grow cotton commercially?” He added that he would never even consider putting cotton hulls in his compost or his kitchen garden, “not in soil where I grow basil or thyme or even sage. I don’t want that stuff around my food.”