Zobrazeno 1 - 10 of 32 pro vyhledávání: '"D. R. Timmons"'
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Fertilizer Management Effects on Leaching of Labeled Nitrogen for No‐Till Corn in Field Lysimeters
Autor: J. L. Baker, D. R. Timmons
Publikováno v: Journal of Environmental Quality. 23:305-310
The fate of labeled N fertilizer applied to no-till corn (Zea mays L.) grown in nonweighing lysimeters was determined for 3 yr after application to evaluate NO 3 -N leaching losses from point-injection and conventional N management systems. In 1984,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43039229f39678ad48fd719eacca2326
https://doi.org/10.2134/jeq1994.00472425002300020013x
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3
Fertilizer Management Effect on Recovery of Labeled Nitrogen by Continuous No‐Till
Autor: D. R. Timmons, J. L. Baker
Publikováno v: Agronomy Journal. 84:490-496
Improved fertilizer N management with respect to placement and timing is especially important in high-residue systems designed to improve N-use efficiency and to speed adoption of erosion controlling tillage practices. By means of point-injection tec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28c3bdc06d2cc129da4d5d631df50759
https://doi.org/10.2134/agronj1992.00021962008400030026x
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4
Recovery of Point‐Injected Labeled Nitrogen by Corn as Affected by Timing, Rate, and Tillage
Autor: J. L. Baker, D. R. Timmons
Publikováno v: Agronomy Journal. 83:850-857
Point-injection technology is being developed to improve fertilizer management, particularly N management. This study was conducted to evaluate the effects of the rate (number) and timing of point-injections of an ammonium nitrate (NH 4 NO 3 ) soluti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a641f2894edb18786a5a0a4e5f3327c
https://doi.org/10.2134/agronj1991.00021962008300050016x
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5
Residual Nitrogen‐15 Recovery by Corn as Influenced by Tillage and Fertilization Method
Autor: D. R. Timmons, Richard M. Cruse
Publikováno v: Agronomy Journal. 83:357-363
Tillage systems that create different surface residue conditions may also affect the recovery of residual fertilizer N during subsequent growing seasons. This study evaluated the recovery of residual labeled N fertilizer in the soil by corn (Zea mays
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fc777e0ae74f44c9cf3009b223cdaad0
https://doi.org/10.2134/agronj1991.00021962008300020019x
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7
The effect of Cr underlayer thickness on magnetic and structural properties of CoPtCr thin films
Autor: M. Mirzamaani, P. R. Ivett, D. R. Timmons, K. E. Johnson, T. Yogi, S. E. Lambert
Publikováno v: Journal of Applied Physics. 67:4686-4688
Thin Co‐based alloy films have shown important recording, magnetic, and structural changes when grown on Cr underlayers of different thicknesses. We have investigated these properties using several different CoPtCr compositions on Cr underlayers ra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b0da254ad2b478ffd58a6bbb8b3f728d
https://doi.org/10.1063/1.344801
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