WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Wednesday, December 12, 2018

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Search results on 12/12/18

241. Allmaras, R.R., J.M. Kraft and J.L. Pikul, Jr.. 1987. Lime and gypsum effects on pea-root-pathogen inoculum and related factors in a wheat-peas rotation.. Agron. J., 79(3):439-445.
Root-disease responses to manageable soil chemical factors, such as pH or Ca saturation, can be an effective biological control strategy. In a wheat-pea rotation, a single application of lime, to ad just pH of a Walla Walla silt loam from 5.5 to 6.2, produced less growth in peas than in wheat - a response inconsistent with greater legume responses to liming. Reduced propagule numbers in the top 0.15m of soil may not have reduced root disease because propagules of F. solani f. sp. pisi were abundant in the 0.15-0.45m layer, which had a pH of 5.7 and showed only a negligible increase of Ca saturation. T: Soil pH responses several years after lime or gypsum application to a Walla Walla silt loam in a wheat-peas rotation. Summary of analysis of variance of propaguledensity, measured in the 0-0.15m depth. Time trends of propagule density in the 0 -0.15m layer of wheat-pea rotation on a Walla Walla silt loam as related to lime and gypsum treatments. etc.

643. Baker, V.W. and I.P. Swanson. 1962. Economic effects of a grass-legume rotation in Palouse wheat-pea area.. WA Agr. Expt. Sta. Circular #183.
Farms using a grass-legume rotation show important economic advantages over other farms in comparison of 5 year data from 3 pairs of Palouse farms. T: Amount of cropland by type of crop. Average annual crop production. Cost inputs and income per cropland acre. Calculated erosion losses.

2965. Ingham, I.M.. 1924. Effect of legumes in rotation upon the nitrogen content of the soil.. M.S. Thesis, Washington State College, Pullman, WA.
Soils at WSC farm were sampled to show residual effect of legumes upon following crops of wheat, and upon the N content of soil. T: Effect of legumes upon the following crops as shown by yields of wheat. Changes in the N content of soils after 5 years of crop rotations. Influence of various rotations on the N/C ratio of the soil.

6184. Severance, G.. 1919. Growing alfalfa without irrigation.. WA Agr. Expt. Sta. Irregular Series #52.
A basic how-to bulletin. Yields at WSC have been 2-3 1/2 T/ac, with extremes of 2-4 T/ac.

6164. Severance, G.. 1919. Clover in the Palouse country.. WA Agr. Expt. Sta., Irregular Series #53.
Basic how-to bulletin.

7200. Veseth, R.. 1989. Conservation tillage spring pea production.. STEEP Conservation Farming Update, Spring 1989, p. 3.
An argument for the use of conservation tillage for spring peas. Cites potential advantages as: increased water storage; less cost; reduced compaction; less erosion. Synthesizes research efforts of : STEEP Tillage/Rotation Plots, Moscow; Palouse Conservation Field Station, Pullman; IPM Research Plots, Pullman. Some findings are that is an increase in yield with 3 year rotations vs. 2 year; winter wheat yields also increased with the 3 year rotation; no difference in yields were found between different tillage systems. T: Average residue and percent surface cover for various tillage and rotation systems. Influence of tillage systems on spring pea yields.

7551. Wilkins, D.E. and J.M. Kraft. 1988. Managing crop residue and tillage pans for pea production.. Proceedings 11th Conference of the International Soil Tillage Org..
Paraplow tillage 33-38 cm deep in the Palouse fractured tillage pans that had formed over 25 yrs, but the pans reformed within 20 months. Paraplow tillage did not change soil water storage, soil water extraction, stand establishment, pea biomass, or pea yield. Leaving >30% of the soil covered with crop residue did not influence soil temperature, soil water content, pea stand, pea biomass, or pea yield as compared with leaving 5% of the soil covered. T: Influence of Paraplow tillage on soil water and pea growth. Effect of primary tillage on distribution of course organic matter in soil profile.

7570. Wilkins, D.E. and J.M. Kraft. 1987. Crop residue management and pea root rot disease.. Am. Soc. Agric. Engrs., Paper No. 87-2510.
The objectives of this research were to determine the influence of placement of crop residue on the distribution and concentration of P. ultimum and F. solani f. sp pisi propagules and the associated impact of these root rot diseases on pea growth. Results suggest that conservation tillage which utilizes crop residue on and near the soil surface for erosion control can be used in areas like northeastern Oregon and southeastern Washington with cold and dry spring weather for fresh pea production and not expect serious increases in root rot diseases over clean till methods. T: Pea response to residue management.

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