A six-year study comparing different types of apple production found that organic growing techniques are more profitable and produce better-tasting fruit than conventional farming methods.
The study by researchers at Washington State University, published today in the journal Nature, comes at a time when apple growers are desperate for an advantage. Washington state tree fruit specialists say they expect as many as 20% of the state's apple farms to fail in the next 18 months.
Headed by soil scientist John Reganold, the research project planted Golden Delicious apples on four acres loaned by a 50-acre commercial farm in the state's Yakima Valley apple district. Each growing system was tested in four different plots, laid out in a random fashion.
In the organic system, a style of farming practiced by 3% of Washington growers, no synthetic chemicals were allowed. In the organic research plots, trees were fertilized with composted manure and organic matter. Weeds were controlled with mulch. Buds were thinned by hand, not defoliants.
The conventional system, employed by at least 60% of the state's apple farmers, used synthetic nitrogen fertilizers, herbicides, pesticides and chemical defoliants.
The "integrated" system, used by about 35% of Washington apple farmers, involved compost and synthetic fertilizers. Weed control was done with herbicides and bark mulch. Toxic chemicals were used to eradicate pests.
The researchers used a scoring system to gauge soil quality, yield, costs and apple sweetness and texture, as well as size and appearance. Prices posted by commercial growers were used to calculate market values of the crops.
"Our results," said Reganold, "show that organic and integrated apple production systems in Washington State are not only better for soil and the environment than their conventional counterpart, but have comparable yields and, for the organic system, higher profits and greater energy efficiency."
Moreover, a panel of tasters found the organic apples to be sweeter.
The study notwithstanding, Tim Smith, a tree fruit extension officer based in the university's Wenatchee office, doubts the organic movement's claims of better fruit. He also worries that farmers will overreact to the study. Smith, who has counseled tree fruit growers in the state for 26 years, pointed out that the largest organic pear supplier in the state just went bust. "It's just an illustration that being organic doesn't mean you're rolling in the dough."
