Browse on keywords: soil quality ID
Search results on 05/24/13
870. Black, A.L.. 1973. Soil property changes associated with crop residue management in a wheat-fallow rotation.. Soil Sci. Soc. Am. Proc. 37:943-946.
2578. Peeters, J.F., A.R. Van Rossen, K.A. Heremans and L. Delcambe. 1975. Influence of pesticides on the presence and activity of nitrogenase in Azotobacter vinelandii.. J. Agric. Food Chem., 23(3):404-406.
The influence of various pesticides on the growth of Azotobacter vinelandii was tested under nitrogen fixing conditions. Growth was stimulated in nearly all cases. The presence of nitrogenase in bacterial extracts was greatly reduced. Inhibition experiments showed that organochlorine compounds have no influence on the reduction of acetylene. Derivatives of 2,4-dinitrophenol inhibit in a specific way. A wide range of pesticides were tested.
2784. Hulbert, H.W.. 1927. Sweetclover.. ID Agr. Expt. Sta. Bull. #147.
Biennial white is best forage, biennial yellow is too short; can handle alkaline soils; earlier seeding is best; 15 lb/ac seed, or 10 lb/ac in drier areas; nurse crop is risky, peas may be best; 3/4 T/ac hay first season, 2-3 T/ac second year; best used for pasture and soil improvement; can be grazed early spring through fall; improves soil quality, breaks up subsoil; sweetclover as green manure too expensive for dry areas; one system used is WW/SC planted in fall (unscarified seed) at 5 lb/ac; after wheat harvest, pastured SC into late fall; field is spring plowed and SF; then WW again, this raised WW yields 3-8 bu/ac; might try with Hubam (annual) SC.
2908. Idaho Agr. Expt. Sta.. 1944. Annual Report. ID Agr. Expt. Sta. Bull. #255.
Legumes and grasses are a good choice for eroded soils; had decent yields and economic returns when compared to grain production on these sites.
4377. McKay, H.C. and W.A. Moss. 1949. High protein wheat with conservation farming.. U. of Idaho Extension Bull. #181.
Emphasize need for legume - grass rotation to maintain soil productivity. Suggest a 7 yr sweet clover rotation or a 9 yr alfalfa rotation. Yellow sweet clover plus mountain bromegrass or slender wheatgrass; Ladak alfalfa plus smooth brome and big bluegrass (high rainfall) or crested wheatgrass (low rainfall); early spring seeding recommended without nurse crop; methods of establishment, plow sweetclover at 12-22" height; use sweetclover as a surface mulch to prevent erosion. T: soil moisture and sweetclover growth; wheat after sweetclover; yield and protein.
5245. Pikul, J.L. and R.R. Allmaras. 1986. Physical and chemical properties of a haploxeroll after fifty years of residue management.. Soil Sci. Soc. Am. J., 50(1):214-219.
Greater inference about the value of long-term crop residue management requires that soil chemical properties be measured together with soil physical properties. After 54 yrs of several different crop residue management treatments in a winter wheat-fallow system in the PNW, soil bulk density, saturated hydraulic conductivity, soil water desorption curves, soil organic carbon, and soil pH were all used to quantify the soil physical and chemical state. Quality of certain soil physical and chemical properties were altered. Changes in soil compaction since 1931 appear to be limited to the top 30m. However, soil compaction was greatest in the control and fall burn treatments where organic carbon addition was lowest. Crop residue management and fertilization with NH4 base fertilizer has had a marked effect on soil pH in the Ap horizon.
5872. Rickman, R.W. and B.L. Klepper. 1980. Wet season aeration problems beneath surface mulches in dryland winter wheat production.. Agron. J., 72:733-736.
Wet season aeration problems beneath surface mulches in dryland winter wheat production. Dentrification was a suspected cause of localized poor growth in winter wheat fields in the Northwest. Measurable anaerobic conditions occurred above and in restricting layers of slowly draining soils supporting poor growth but not in adjacent, unlayered soils supporting good growth. Surface mulch increased water infilitration in both soils but prolonged low oxygen levels in slowly draining soils. Beneath the mulch essentially all of the fertilizer N was lost on the slowly draining soil and yield was 35% lower than that on mulched normal soil.
6174. Severance, G., B. Hunter and P. Eke. 1930. Farming systems for eastern Washington and northern Idaho.. ID Agr. Expt. Sta. Bull. #173.
same as WA AES Bull. 244
6583. USDA Soil Conservation Service. 1974. Soil conditioning rating indices for major irrigated and non-irrigated crops grown in the Western U.S.. Conservation Agronomy Technical Note No. 27.
This document presents a rating system to judge how various cropping systems affect soil condition over time. It assigns numerical values to various practices and totals them over a rotational sequence, with either a +, -, or neutral outcome. It is not a method for determining erosion. The concepts presented are helpful in assessing "soil quality" for cropping systems, both irrigated and dryland.
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.