HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (14) Citing Articles via Google Scholar Google Scholar Articles by Schillinger, W. F. Articles by Papendick, R. I. Search for Related Content PubMed Articles by Schillinger, W. F. Articles by Papendick, R. I. Agricola Articles by Schillinger, W. F. Articles by Papendick, R. I. Related Collections Crop Rotation Systems Dryland Cropping Systems Other Grain Crops Tillage

DRYLAND CROPPING SYSTEMS

Increased Dryland Cropping Intensity with No-Till Barley

^a Dep. of Crop and Soil Sciences, Dep. of Plant Pathology, and USDA-ARS, 201 Johnson Hall, Washington State Univ., Pullman, WA 99164-6420 USA

schillw{at}wsu.edu

For most of a century, the wide spread practice of growing only one crop every other year in a tillage-based wheat (Triticum aestivum L.)–fallow rotation has degraded soils and contributed to environmental problems in low-precipitation (<350 mm annual) dryland regions of the inland Pacific Northwest of the USA. Many growers in this 2-million-ha cropland area are increasing the intensity of cropping with spring crops, but most use conventional tillage (CT) for seedbed preparation. The agronomic performance of spring barley (Hordeum vulgare L.), sown into CT seedbeds with double-disk drills or into standing stubble with several types of no-till (NT) drills (hoe, single disk, and notched coulter), was determined in two experiments conducted both in 1996 and 1997 where the previous crop was either winter wheat or spring barley. We measured stand establishment, seed-zone temperature, soil water, dry biomass accumulation, rhizoctonia root rot, surface residue retention, and grain yield components. Plant stand , dry biomass accumulation , and spike density as single independent variables, and combined in a multiple regression model , were strongly correlated (P < 0.001) to grain yield. Early-season seed-zone temperatures were cooler under NT, but seed-zone water was slightly higher with CT. Low spike density consistently occurred in a wide row spacing (406 mm) NT drill treatment, and the highest overall yields were obtained with NT drills with rows spaced 255 mm or less. Rhizoctonia root rot was severe on seminal roots in all treatments in three out of four trials, but did not appear to limit yields, possibly due to healthy crown roots and favorable growing conditions. No-till spring sowing into undisturbed standing stubble (2420–5230 kg ha^-1) can produce grain yields equal to or exceeding those under CT and can provide environmental and potential soil quality benefits for low-precipitation dryland farming areas in the inland Pacific Northwest.

Abbreviations: CT, conventional tillage • JD, John Deere • NT, no-till

This article has been cited by other articles:

				W. F. Schillinger Tillage Method and Sowing Rate Relations for Dryland Spring Wheat, Barley, and Oat Crop Sci., October 27, 2005; 45(6): 2636 - 2643. [Abstract] [Full Text] [PDF]

				R.J. Cook, B. H. Ownley, H. Zhang, and D. Vakoch Influence of Paired-Row Spacing and Fertilizer Placement on Yield and Root Diseases of Direct-Seeded Wheat Crop Sci., July 1, 2000; 40(4): 1079 - 1087. [Abstract] [Full Text]