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Subject: помогите, пожалуйста, с предложением gen. It is possible that because of the large amounts of nitrogen removed via soybean seed (150–200 kg N ha–1), soybean may frequently act as an nitrogen sink rather than a nitrogen source and any nitrogen benefit is due to nitrogen sparing rather than nitrogen fixation. However, Ennin and Clegg (2001) found evidence for soybean nitrogen fertilizer replacement values in Nebraska of up to 46 kg N ha–1 in rotation with maize (although only at high plant populations).Не могу понять смысл второго предложения, в частности found evidence for soybean nitrogen fertilizer replacement values in Nebraska of up to 46 kg N ha–1
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