Issue link: http://winesandvines.uberflip.com/i/197145
w i n e G R O WIN G potential to cause high short-term emissions, such as fertigation, tillage and precipitation, were measured more frequently —often only hours apart (Figure 8). Nitrous oxide emissions are often characterized by short intervals of very high emissions in areas where resources like water and nitrogen converge, in particular when irrigation or precipitation water saturate soil pores and low oxygen conditions prevail. Vineyards represent complex spatial environments since the drip zone is farmed in one manner (herbicide applications and drip irrigation), while the tractor rows are farmed in another manner (tractor cultivation, seeded cover crops and dry land conditions, for example). In the drip zone, most emissions come from point sources centered under the emitter and during times of drip fertigation and irrigation. Figure 6: Average vineyard N2O-N effluxes over two years (2009-10), showing especially the importance of first fall rains in October and KNO3-fertigations in late June/early July. Also evident are rains after tillage in May of both years—and April 2010. Agfast Aglok Sept01 7/31/01 8:03 AM Page 1 AGLOK™ • UV stabilized with carbon black additive • Strong, durable and flexible • Versatile – used in tree and vine crops and in nursery and irrigation applications • Easy to use – and reuse • Now available in 11-1/2, 150' dispenser cartons & 500' foot spools For your nearest dealer, contact: Toll-Free: 877.552-4828 909.451.2299 • Fax: 909.593-8309 90 p r acti c al w i ne ry & v i n e yard NOVEMBER 20 13 10/09/13 09:57