共 50 条
- [32] DETERMINATION OF ECONOMIC THRESHOLDS AND ECONOMIC INJURY LEVELS FOR MONOCOTYL AND DICOTYL WEEDS IN WINTER-WHEAT AND WINTER BARLEY .1. THE METHODS OF CALCULATING THRESHOLD VALUES IN RELATION TO ECONOMICAL AND BIOLOGICAL-TECHNICAL INFLUENCES FOR THE EXAMPLE WINTER-WHEAT ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION, 1981, 88 (2-3): : 65 - 85
- [33] INVESTIGATIONS ON THE APPLICATION OF ECONOMIC INJURY LEVELS FOR WEEDS IN WINTER BARLEY - FACTORS OF INFLUENCE AND POSSIBILITIES OF PROGNOSIS FOR THE DEVELOPMENT OF WEED INFESTATION ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION, 1985, 92 (01): : 1 - 16
- [36] AN ECONOMIC ANALYSIS OF BARLEY PRODUCTION RESPONSE TO DIFFERENT LEVELS OF NITROGEN AND PHOSPHORUS FERTILIZERS IRAQI JOURNAL OF AGRICULTURAL SCIENCES, 2007, 38 (05): : 1 - 6