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Water regimen of mountain chestnut soils under various agricultural crops

, : Water regimen of mountain chestnut soils under various agricultural crops. Izvestiya Akademii Nauk Azerbaidzhanskoi SSR Seriya Biologicheskikh Nauk (6): 48-52

The moisture content was studied in virgin soils and in soils under wheat, sainfoin and sunflower in the Greater Caucasus, USSR. Two periods of moisture regimen were observed in mountain chestnut soils. The 1st period (Oct.-May) was characterized by moisture accumulation in the soil (to a depth of 120-140 cm) precipitation exceeding evaporation. The 2nd period (May-Oct.) was characterized by intense moisture expenditure on physical evaporation and plant absorption. Moisture expenditure in soils under wheat consisted of uptake by cultivated plants and by weeds which appeared at the end of wheat vegetation. Weeds absorbed the moisture left in deep horizons, thus increasing the soil moisture deficit. Weed control all year is necessary.


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