SOLUBLE SALTS AND NITRATE DISTRIBUTION IN IRRIGATED LETTUCE BEDS.

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作者
Hummadi, Khalid B.
Fangmeier, D.D.
Tucker, T.C.
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AGRICULTURAL ENGINEERING - SOILS - Salinity Measurement;
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The salt and nitrate content was measured in lettuce beds irrigated by sprinkler, furrow and combined methods. Salt and nitrate content was determined by depth in the center, near both sides of the bed and in the furrow between beds. Furrow irrigation continually increased the salt content of the surface 2. 5 cm of soil in the bed particularly in the center of the bed. Sprinkler irrigation slightly decreased the salt content during the season. Below 7. 5 cm the irrigation method had little effect.
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页码:686 / 689
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