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You searched for: Journal name Agronomy journal Remove constraint Journal name: Agronomy journal Publication Year 1980 Remove constraint Publication Year: 1980 Subject term Elymus repens subsp. repens Remove constraint Subject term: Elymus repens subsp. repens Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. Ammonia Exchange at the Land Surface

Author:
Edgar Lemon; Raymond Van Houtte
Source:
Agronomy journal 1980 v.72 no.6 pp. 876-883
ISSN:
0002-1962
Subject:
Elymus repens subsp. repens; Glycine max; Medicago sativa; absorption; agronomy; air; alfalfa; ammonia; biosphere; computer simulation; nitrogen fixation; soil; vegetation; wind
Abstract:
... Studies of NH₃ exchange between plant leaves and air have mostly been made in controlled chambers where the concentrations were far above the ambient atmospheric levels usually found in nature. Under such conditions leaves act as an infinite sink for NH₃. More recent controlled chamber studies, however, have shown NH₃ evolving from leaves when concentrations were nearer to those of the atmosphere. ...
DOI:
10.2134/agronj1980.00021962007200060005x

2. Establishment of Alfalfa by Conventional and Minimum-Tillage Seeding Techniques in a Quackgrass-Dominant Sward

Author:
G. W. Mueller-Warrant; D. W. Koch
Source:
Agronomy journal 1980 v.72 no.6 pp. 884-889
ISSN:
0002-1962
Subject:
Elymus repens subsp. repens; Haplorthods; Medicago sativa; alfalfa; application timing; discing; energy; forage; forage yield; glyphosate; labor; minimum tillage; mowing; paraquat; pesticide application; plant density; plowing; sandy loam soils; seedlings; sowing; sward
Abstract:
... Minimum-tillage establishment of forages offers potential advantages over the conventional method in terms of reducing energy and labor requirements, erosion hazard, and improving flexibility, and timeliness of operation. Our objective was to compare these methods of establishing alfalfa (Medicago sativa L.) with various herbicides, time intervals between herbicide application and seeding, and see ...
DOI:
10.2134/agronj1980.00021962007200060006x