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Details for article 155 of 183 found articles
| Title: |
Seasonal P uptake by corn under no-till and conventional-till management |
| Author: |
Kunishi, H. M. Bandel, V. A. Mulford, F. R. |
| Appeared in: |
Communications in soil science and plant analysis |
| Paging: | Volume 17 (1986) nr. 6 pages 591-600 |
| Year: |
1986-06 |
| Contents: |
This study was conducted to measure season-long uptake of P by corn grown under no-till and conventional-till management at three levels of P supply-low, adequate, and high as defined by grain yield-to test the feasibility of using whole-plant P uptake as an indicator of the P supply in soil; and to calibrate soil P extractable with both Mehlich No. 1 (HC1 + H2SO4) and Mehlich No. 2 (HC1 + H2SO4 + NH4F) versus whole-plant P uptake over the response region. Rates of P uptake were essentially linear over about 10 weeks of the growing season. P uptake rates were consistently higher under no till than conventional till, and these uptake rate differences were magnified under low moisture conditions. The critical P uptake rate for corn on this Matapeake soil was between 25 and 30 mg P/plant/week. Rates below these resulted in significant grain yield reductions in a good growth year. The soil P extractant containing F was a more consistant indicator of soil P sufficiency. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 155 of 183 found articles
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