29
MAR
2016
Partial factor productivity of nitrogen fertilizer on grain and grain protein yield of durum wheat cultivars
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G. Panayotova1*, S. Kostadinova2 1Department of Plant Production, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria 2Department of Agrochemistry and Soil Science, Faculty of Agronomy, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria (Manuscript receiv
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