[word=pH] □
[word=pH] [□]
[word=pH] □?
Conversely , use of magnesium carbonate or potassium carbonate will increase soil pH , but no Ca is being supplied . Gametogenesis , the emergence of gametes from erythrocytes , is triggered by diverse factors within the mosquito midgut , including shifts in temperature , pH , and CO2 tension , as well as the mosquito molecule , xanthurenic acid ( 2 , 3 ) . Other factors affecting the survival of pathogens in the vadose zone ( the unsaturated zone extending from the earth 's surface to the permanent water table ) are pH , temperature and oxygen concentration . National Soil Survey Center ( NSSC ) performs many soil property analyses , which can be grouped as chemical analyses ( pH , CEC , trace element composition , etc. ) , physical analyses , ( particle size distribution , bulk density , water content , etc. ) , and mineralogical analyses ( clay species ( kind of clay ) and amounts , and kinds of minerals in the silt and fine sand fractions ) .