WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, July 23, 2018

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Search results on 07/23/18

2006. Forcella, F.. 1986. Timing of weed control in no-tillage wheat crops.. Agron. J., 78:523-526.
A 2-yr study of the timing of wheat/weed interference was initiated in southwestern Australia. Weeds were controlled either manually or chemically at various stages of crop growth. In all cases, wheat/weed competition increased when soil temperature exceeded 10 degrees C and resulted in rapid depletions of available N.

5491. Radke, J.K., A.R. Dexter and O.J. Devine. 1985. Tillage effects on soil temperature, soil water, and wheat growth. Soil Sci. Soc. Am. J. 49:1542.
Plots of fine sandy loam were tilled with either a scarifier (tine digger) or a rotary cultivator (rotovator), or left untilled as checks. Wheat grown on rotovated plots was significantly taller and yielded more at harvest than wheat grown on scarified plots. Differences in wheat plant height were related to soil structure and soil water but not to soil temperature.

5335. Poole, M.L.. 1987. Tillage practices for crop production in winter rainfall areas. p. 24-27.. IN: P.S. Cornish and J.E. Pratley (eds.) Tillage - New Directions in Australian Agriculture..

5981. Rovira, A.D.. 1986. Influence of crop rotation and tillage on Rhizoctonia bare patch of wheat.. Phytopathology, 76(7):669-673.
Rhizoctonia bare patch was more severe in direct drilled wheat than in wheat sown into cultivated soil. The area of affected crop was consistently larger when wheat followed a mixed annual pasture of grasses and Medicago spp. than when wheat followed wheat, peas, or grass-free pasture of Medicago spp. All isolates of R. solani were pathogenic on wheat, barley, peas, Medicago spp., annual ryegrass, and barley grass.

10436. Haines, P.J. and N.C. Uren. 1990. Effects of conservation tillage farming on soil microbial biomass, organic matter and earthworm populations, in northeastern Victoria.. Austral. J. Expt. Agric. 30:365-371.
Wheat was grown continuously for 7 years with conventional tillage and direct drilling (no-till). There was a significant gradient of organic matter under no-till. In the surface 2.5 cm, biomass C and N, and N mineralization were 35, 30, and 62% greater, respectively, than under conventional tillage. No-till did not significantly increase soil organic C or N. Of the estimated 7.8 t/ha of C added to the soil from crop residues, 4% was retained in the top 7.5 cm at the time of sampling. Microbial biomass varied considerably with season. The biomass of earthworms in the top 10 cm under no-till was more than twice that of conventional tillage, while total worm numbers increased significantly when wheat residue was retained versus burned.

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