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- [2] INCREASED USE OF NITROGEN-FERTILIZER AND PESTICIDES FOR WINTER-WHEAT BERICHTE UBER LANDWIRTSCHAFT, 1977, 55 (03): : 375 - 400
- [6] RELATIONSHIP BETWEEN ELECTROULTRAFILTRATION (EUF) EXTRACTABLE NITROGEN, GRAIN-YIELD, AND OPTIMUM NITROGEN-FERTILIZER RATES FOR WINTER-WHEAT FERTILIZER RESEARCH, 1992, 32 (01): : 37 - 43
- [8] FEASIBILITY OF PLANT ANALYSIS FOR NITROGEN-FERTILIZER RECOMMENDATIONS TO WINTER-WHEAT LANDWIRTSCHAFTLICHE FORSCHUNG, 1979, 32 (04): : 384 - 394
- [10] EFFECT OF NITROGEN-FERTILIZER RATE ON SOIL NITRATE NITROGEN-CONTENT AFTER HARVESTING WINTER-WHEAT JOURNAL OF AGRICULTURAL SCIENCE, 1990, 114 : 171 - 176