Skip to main content

Conservation tillage effects on sediment and phosphorus losses from a furrow irrigated field

Bjorneberg, David L. and Aase, J. Kris. (2004) Conservation tillage effects on sediment and phosphorus losses from a furrow irrigated field. pp. 1-10. In: Proceedings of ASAE/CSAE Annual International Meeting. Canada-Ontario-Ottawa, 2004/08/01-04.

[img] PDF
1141.pdf

Download (121kB)

Abstract

Dry beans are often grown after alfalfa in southern Idaho, which conventionally involves four or more
tillage operations before planting. The objective of this three year study (1998-2000) was to
determine the effects of conservation tillage on runoff, soil erosion and phosphorus loss from dry
beans following small grain under furrow irrigation. Tillage treatments were direct seed, spring disk,
fall disk and fall chisel plow. Polyacrylamide (PAM) was applied to half of the furrows during the last
two years of the study. Direct seeding increased residue in furrows, which tended to reduce runoff
volume and soil loss but increased soluble P loss. Applying PAM significantly reduced soil loss for
only 4 of 11 irrigations, but significantly decreased total annual soil loss 63% in 2000. Direct seeding
did not significantly reduce dry bean stand, but weed competition and other factors reduced bean
yields from direct seed by 39% and 47% the last two years of this study. The three tilled treatments
had similar crop yields, residue amounts and phosphorus losses

Item Type: Conference or Workshop Item (Paper)
NWISRL Publication Number: 1141
Subjects: Irrigation > Furrow irrigation > Runoff losses > Sediment
Irrigation > Furrow irrigation > Runoff losses > Nutrients
Soil > Tillage
Mass Import - autoclassified (may be erroneous)
Depositing User: Users 6 not found.
Date Deposited: 07 Mar 2008 18:31
Last Modified: 03 Nov 2016 16:12
Item ID: 952
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/952