Fertility and tilth effects of fuel-crop-residue removal. Final report, March 23, 1979-December 31, 1981
Research objectives were to evaluate the effect of differential levels of crop residue removal on tillage and on runoff, erosion, sediment, and nutrient losses with continuous till and no-till runoff plots and to evaluate the effect of differential levels of crop residue removal and tillage on soil organic matter, nitrogen, and phosphorus availability, bulk density, soil water, soil temperature, grain production, residue production, and nutrient content of crop and grain. The effects of tillage and residue management on soil organic matter nitrification and N mineralization potential using plots established before initiation of this study were also studied. Results indicate that the small amounts of runoff generated during water years 1980 and 1981 prevent firm conclusions from the data. There were trends for less soil and nutrient losses from the no-till plots as residue amounts were increased. Tillage did not seem to affect grain and straw yields from the runoff and erosion plots in 1979 and 1980. Grain and straw yields, %N, and %P for 1979 from the soil physical, chemical, and biological plots were unaffected by tillage. Grain and straw yields from the lower slope plots were higher because of better soil moisture. Results from the N-mineralization potential study showed that moldboard plowing resulted in uniform N-mineralization potentials throughout the top 15 cm of soil, but the N-mineralization potential at 0 to 5 cm was greater for chisel plowing and no-till than for moldboard plowing and less at the 5- to 10- and 10- to 15-cm depths. Crop rotations resulted in different N-mineralization potentials with depth throughout the top 15 cm of soil. The net result was that average N-mineralization potential for 0 to 15 cm was unaffected by tillage or crop rotation. Soil water was periodically measured by neutron and gravimetric methods on all research plots. Results are reported. (JGB)
- Research Organization:
- Department of Agriculture, Pullman, WA (USA)
- DOE Contract Number:
- AI05-79OR20305
- OSTI ID:
- 5242087
- Report Number(s):
- DOE/OR/20305-T1; ON: DE82018074
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
09 BIOMASS FUELS
AGRICULTURAL WASTES
MANAGEMENT
BIOMASS
CULTIVATION TECHNIQUES
CHEMICAL ANALYSIS
CROPS
CULTIVATION
EROSION
FERTILITY
LOSSES
MINERALIZATION
MOISTURE
NITRIFICATION
NITROGEN
NUTRIENTS
RUNOFF
SEDIMENTS
YIELDS
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
MASS TRANSFER
NONMETALS
ORGANIC WASTES
RENEWABLE ENERGY SOURCES
WASTES
553000* - Agriculture & Food Technology
510500 - Environment
Terrestrial- Site Resource & Use Studies- (-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)