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Year 2009 Remove constraint 2009: 2009 Authors Johnson, Douglas A. Remove constraint Johnson, Douglas A.: Johnson, Douglas A.

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1. 'Vavilov II', a New Siberian Wheatgrass Cultivar with Improved Persistence and Establishment on Rangelands

Description:: Includes references
Author:: Jensen, Kevin B. , Palazzo, Anthony J. , Waldron, Blair L. , Robins, Joseph G. , Bushman, B. Shaun , Johnson, Douglas A. , Ogle, Dan G.
Subject:: Agropyron fragile , forage grasses , forage crops , cultivars , germplasm releases , crop yield , rangelands , land restoration , range improvement , crossing , plant establishment , plant density , Utah
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009

2. Nitrogen Uptake by Perennial and Invasive Annual Grass Seedlings: Nitrogen Form Effects

Description:: Includes references
Author:: MacKown, Charles T. , Jones, Thomas A. , Johnson, Douglas A. , Monaco, Thomas A. , Redinbaugh, Margaret G.
Subject:: Bromus tectorum , Taeniatherum caput-medusae subsp. asperum , grass weeds , noxious weeds , invasive species , perennials , annuals , seedlings , nitrogen , Elymus , nutrient uptake , plant nutrition , Pseudoroegneria spicata , forage grasses , indigenous species , ammonium nitrogen , ammonium nitrate , nitrate nitrogen , fertilizer rates , dry matter accumulation , nitrification , vigor , plant competition
Collection:: Journal Articles, USDA Authors, Peer-Reviewed
Year:: 2009