نوع مقاله : مقالات پژوهشی
نویسندگان
چکیده
عنوان مقاله [English]
نویسندگان [English]
Abstract
Beneficial effects of humic substances on plant growth have been recognized by many researchers. A greenhouse experiment was conducted with humic acid (0, 20 and 50 mg/l) on lettuce cultivars ‘Lollorossa’ and ‘Javelina’ using completely randomized design at university of Guilan. Results showed that humic acid affected (P
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