Browse on keywords: grass soil quality
Search results on 05/19/13
35. Anon.. 1949. Grasses and legumes for soil conservation in the PNW.. .
An excellent treatment of over 60 species - detailed descriptions. T: maps and photos.
2211. Goldstein, Walter. 1989. Thoughts on drought-proofing your farm: a biodynamic approach. Working paper No. 2, Michael Fields Agr. Institute.
Describes the influence of soil aggregate size on moisture retention and crop growth. Discusses the benefits of perennial grasses in the rotation to improve soil structure. Discusses management of sweetclover for grazing and green manure. Discusses stubble mulch tillage.
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.
4220. McCool, D.K.. 1990. Effects of grass sod on runoff and erosion.. unpublished paper, USDA-ARS, Pullman, WA 99164-6421.
Runoff and soil loss plots were established at several sites in eastern WA to examine the effect of grass sod at various stages of management. Runoff and soil loss were high on a new grass seeding. Burned grass fields had high runoff but low soil loss. The first wheat crop after grass had high runoff and soil loss due to intense tillage. Winter wheat on land with no grass history had larger runoff and soil loss than when seeded the 3rd year after plowout. Use of no-till seeding can reduce erosion during the hazard years of a grass system. Runoff was lowest in the wheat in the 3rd year after grass.
4836. Nesbitt, L.D.. 1950. Save our soil.. Alberta Wheat Pool, Calgary, Alberta, Canada.
Describes the case for soil conservation in the Canadian prairies. Discusses methods to prevent erosion, the importance of grass and maintenance of soil organic matter. Mentions good references, but no citations. Several good quotes about soil conservation.
6629. Stark, R.H., J.L. Toers and A.L. Hafenrichter. 1946. Grasses and cultural methods for reseeding abandoned farm lands in the wheat/fallow zone of the intermountain West.. ID Agr. Expt. Sta. Bull. #267.
Wheat/fallow zone of intermountain west; cheatgrass takes over abandoned land, perennials can't re-establish; tried summerfallow, duckfoot cultivator, burning, and no preparation; summerfallow gave best results; fall seeding best; recommend planting of several grasses in different blocks to extend grazing. T: methods, yields, species, accessions, bibliography.
6720. Stephenson, R.E.. 1941. Humus for Oregon soils.. OR Agr. Expt. Sta. Circ. #143.
Four tons of stable manure were equal in value to 5 tons of green manure plowdown. The humus renewal of 1 yr legume sod equaled the humus lost during 1 yr row cropping. Plant material should never be burned. Fresh additions of organic matter stimulate root developement. Alfalfa for soil building - 2/3 of roots left below plow layer. Pea green manure raised OM content by 0.2% after 4 crops. Prairie grass adds 4T/ac roots in 4" of soil. T: organic matter levels and changes.
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.