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Filtering by: Alternative title ssim EC 788 Advisor Dick, Richard P. Decade 1990-1999

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:

Burket, John Zimmerman

Abstract:

Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...

Resource Type:

Dissertation

Full Text:

: 783-788. Dick, R. P. 1992. A review: long-term effects of agricultural systems on soil biochemical
Winter cover cropping effects on integrative biological indicators of soil quality

Creator:

Ndiaye, Evelyne L.

Abstract:

Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...

Resource Type:

Masters Thesis

Full Text:

cultivated soils (69 yrs) in comparison with adjacent grassland. 23 Beta-glucosidase (EC 3.2.1.21
Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen, phosphorus, and sulfur

Creator:

Christ, Robert A.

Resource Type:

Masters Thesis

Full Text:

. 29 50 40 0 0_ Ec:3) 30 w Y < 20I a_ D Z 10 0 30 60 90 120 TIME (days) Fig. 1.2