Year: 1982
Type: article
Abstract: Phosphoric acid (H 3 PO 4 ), applied as an over-the-row banded spray to Willamette silt loam, significantly hastened the emergence of seedlings of carrot ( Daucus carota L.), cauliflower ( Brassica oleracea L. var. botrytis ), cucumber ( Cucumis sativus L.), lettuce ( Lactuca sativa L.), and onion ( Allium cepa L.). Final stands were usually improved. The effect was particularly pronounced in early plantings. Banded H 3 PO 4 decreased soil crusting as measured by decreased mechanical resistance to penetration of the soil surface. Phosphorus content of seedlings of carrot, cucumber, lettuce, and onion was significantly increased with H 3 PO 4 anticrustant. Yields were usually greater on soils treated with H 3 PO 4 than on soils treated with either broadcast or subsurface banded applications of concentrated superphosphate (CSP). Subsurface bands of CSP resulted in poorer stands, lower leaf P content, and smaller yields of carrot, lettuce and onion than did banded H 3 PO 4 at the same rate of P application. However, both leaf P content and yield of cucumber tended to be greater with CSP than with H 3 PO 4 . Phosphoric acid treatment improved stand of carrot and lettuce at soil pH between 5.0 and 6.1 but decreased stand at pH 6.6.
Author: Delbert D. Hemphill
Institution: Oregon State University
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W4289842392