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Grafting can help watermelon yields

In the summer of 2018, watermelon growers brought a pressing problem to Zheng Wang, who had recently joined University of California Cooperative Extension as the vegetable crops and irrigation advisor for Stanislaus, San Joaquin and Merced counties. They were seeing an increasing number of their cartons rejected by supermarkets and other buyers because of the melons’ inconsistent quality. After some reflection, Wang wondered if the ancient technique of grafting would help the state’s melon growers, who plant about 10,000 acres of the crop each year.

In his first trials in partnership with growers in 2019, Wang tested whether they could plant fewer watermelon plants, spaced at greater distances apart, while producing a stable yield of high-quality melons. The idea was that grafted plants, which are more vigorous and grow larger leaves and wider canopies, would produce consistently marketable melons that could be picked up to seven or eight times during an extended harvest season.

According to Wang, growers reported that, on average, their successfully grafted fields produced 15% to 25% more watermelons than non-grafted fields per acre, while using 30% fewer plants and the same amount of water and fertilizers.

Source: kymkemp.com


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