WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Sunday, March 24, 2019


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Search results on 03/24/19

3742. Kramer, J. and J.E Weaver. 1936. Relative efficiency of roots and tops of plants in protecting the soil from erosion.. Dept. of Conservation Bull. 12, Univ. Nebraska, Lincoln, NE.

4358. McHenry, J.R., L.T. Alexander and L.L. Zook. 1946. Carbon and nitrogen contents of a chernozem soil as affected by age of perennial grass sods.. Soil Sci. Soc. Am. Proc. 11:407-412.
Compared soil organic carbon and nitrogen changes due to perennial grass established 0-9 yrs; C and N decreased under all treatments, although the changes were slight with more than 6 yr sod; only with >6 yr sod were C and N % significantly greater than continuous cultivation; the system may have been nutrient limited, or it may take longer to develop equilibrium; root mass ranged from 1600-5200 lb/ac/yr. T: carbon and nitrogen levels; root mass.

7464. Weaver, J.E. and W.C. Noll. 1935. Comparison of runoff and erosion in prairie, pasture, and cultivated land.. Conservation Dept. Bull. 11, Univ. Nebraska, Lincoln, NE.
Relative runoff from 27" rainfall over 15 months on plots with 10% slope: prairie 2.5%; overgrazed pasture 9.1%; bare soil 15.1%. Water penetration was nearly four times as great in prairie as in pasture. Even with runoff, no measurable erosion occurred on any of the grassed plots.

9809. Weaver, J.E. and G.W. Harmon. 1935. Living materials in prairie soils in relation to run-off and soil erosion.. Univ. Nebraska Bull. 8:1-53, Conservation Dept..
describes root mass contributions by various grass and cultivated crops.

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