Lesson Files (Last Updated 121118):
018_how_are_seeds_germinated_hydroponically_part_I
019_how_are_seeds_germinated_hydroponically_part_II
020_how_is_germination_rate_calculated
024_what_are_standards_and how_are_ph_standards_prepared
025_how_is_a_ph_meter_calibrated
027_which_solution_can_buffer_pH_better_filtered_water_or_seawater__an_experimental_approach
029_how_does_electrical_conductivity_relate_to_plant_nutrition
030_how_do_you_adjust_the_nutrient_content_of_a_solution