Assessment of Changes in Acid-base Properties of Soils of Reclaimed Agricultural Lands under Conditions of Aerotechnogenic Impact

The acid-base properties of old plowlands on reclaimed agricultural lands under the influence of motor transport emissions were analyzed. In comparison with background conditions (control), the decrease of actual and exchangeable acidity to neutral and alkaline (pH water = 6.65÷7.82) was established, and also slightly acidic and close to neutral (pH sol = 5.57÷6.23) reaction of soil environment (respectively) was noted. Increase of hydrolytic acidity – up to very strongly acidic (9.0–23.7 mg-eq/100 g) was recorded. Expressed changes in texture-differentiated gleyey and alfehumus gleyey agrozems were revealed: a significant decrease in topical acidity is characteristic of the former and a significant increase in hydrolytic acidity – for the latter. It is concluded that changes in the acid-base state of soils in the territories adjacent to highways should be taken into account when developing agrotechnical measures for growing field crops.