Effects of drip fertigation of NH4-N and P on soil pH and cation leaching

acidification ammonia ammoniac ammonium ammonium nitrate ammonium phosphate calcio calcium cation cationes cations fertigation fosfato de amonio irrigation fertilisante leaching lessivage du sol low input agriculture magnesio magnesium malus pumila nitrate d'ammonium nitrato de amonio ph phosphate d'ammonium polifosfatos polyphosphate polyphosphates potasio potassium riego por goteo soil chemicophysical properties trickle irrigation