WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Wednesday, June 20, 2018

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Search results on 06/20/18

5539. Ramig, R.E.. 1987. Conservation tillage systems for green pea production in the Pacific Northwest.. IN: J.F. Power (ed.). The role of legumes in conservation tillage systems. p. 93-94.
Summarizes a 13 yr study of the effects of 4 tillage systems in a pea-winter wheat cropping system on water conservation and use, yields, water use efficiency, and the changes in weed populations. Water storage on land on which wheat stubble was left standing overwinter averaged 10% more than on fall-tilled stubble. There were no significant differences in wheat yields among tillage systems. Weed infestations in peas shifted due to tillage, primarily with lambsquarters. Spring plow was worst. Conservation tillage for a wheat-pea rotation can enhance water conservation, and in dry years can increase pea yields by 20% and wheat yields by 5%. Long-term effects are not consistent due to crop residue influences.

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.

7581. Wilkins, D.E., D.A. Hasch, P.E. Rasmussen and J.M. Kraft. 1984. Chisel plowing effects on pea growth.. Amer. Soc. Agric. Engrs. Paper No. 84-1011.
Rupturing the tillage pan with a chisel and planting directly over the chisel mark increased dry pea yields by as much as 50%. Chiseling and not rupturing the pan depressed yields. Root disease was not influenced by chisel tillage. T: Pea yield with and without chisel treatments. Pea root disease index. Soil water status as influenced by chisel tillage.

8608. Young, F.L.. 1990. IPM systems research.. unpublished handout from USDA-ARS Weed Research Unit, Pullman, WA 99164.
The IPM Weeds study near Pullman, WA uses two 3-yr crop rotations, two tillage systems, and three weed management (herbicide) levels. Spring pea average yields after 3 yr were higher with chisel plow than with moldboard plow, slightly responsive to increased weed management level, and highest with maximum weed management/chisel plow combination.

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