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Conservation tillage is not practical in some areas of the Northern part of the United States because the practice lowers the surface soil temperature in the spring of the year.
Q1: Application of phosphorus fertilizer usually makes plants
Q4: Companies can only create customer value if
Q15: Active soil acidity is a measure of
Q18: Fertilization to supply the nutrient element iron
Q18: The terms "ammonium fixation" and "biological nitrogen
Q20: When the soil pH = 5.3,manganese is
Q24: A soil profile consists of _.<br>A)the sum
Q26: Although only about 2 to 5 percent
Q31: In which of the following systems are
Q32: Organic chemicals whose structures have positively charged