WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, April 24, 2018

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661. Barnes, O.K. and D.W. Bohmont. 1958. Effect of cropping practices on water intake rates in the northern Great Plains.. WY Agr. Expt. Sta. Bulletin 358.
The rate of water absorbed by the soil was evaluated on bare fallow, trashy fallow, and grassland. Total absorbed water in one hour was 1.55, 2.80, and 2.11 inches for the respective covers. The water intake rate at one hour was 0.3 in/hr for bare fallow and 2.26 in/hr for trashy fallow. Water intake rates associated with other tillage practices are also presented in this bulletin.

3154. Beck, Dwayne. 1990 Apr.. untitled news brief. Acres USA, p. 18.
A South Dakota State University study showed that soil untilled for six years was able to absorb ten inches of rainfall for a two hour period, compared to 0.6 inches an hour for a plowed portion. Earthworm channels were felt to be the factor on the untilled soil. Tillage cuts off the channels from the surface.

5253. Pikul, J.L. Jr., J.F. Zuzel and R.N. Greenwalt. 1988. Tillage impacts on water infiltration.. OR Agr. Expt. Sta. Special Report 827, p.46.

5273. Pikul, J.L., J.F. Zuzel and D.E. Wilkins. 1988. Measurement of tillage-induced soil macroporosity.. Amer. Soc. Agric. Engr., Paper No. 88-1641.
An improved method to impregnate soil with paraffin was used to study tillage induced macroporosity. Macroporocity and water infiltration measurements, conducted in March, attest to the overwinter stability of macropore structure on both the chisel and Praplow tillage treatments. Water infiltration was least on the no-tillage treatment.

7672. Wysocki, D.. 1989. Improving water infiltration in frozen soil.. STEEP Conservation Farming Update, Summer 1989, p.13-14..
Compared fall chisel versus standing stubble for water infiltration at 3 dates. No difference in July following harvest, much lower infiltration with stubble in December with 5" frost depth, no difference (low infiltration) in January with 14" frost depth. For chisel tillage to be effective, chisel marks must be open to the surface, and chisel fracturing should penetrate below the frost depth. Deeper chiseling at wider spacing, or subsoiling, may be an option.

7826. Zuzel, J.F., J.L. Pikul, and P.E. Rasmussen. 1990. Tillage and fertilizer effects on water infiltration.. Soil Sci. Soc. Am. J. 54:205-208.
Tillage and fertilization practices affect water infiltration. A long-term study at Pendleton, OR compared three tillages (plow, disk, and sweep) since 1940, and two rates of N (45 and 180 kg/ha) since 1962. Infiltration rates for plow, disk, and sweep were 17, 14, and 16 mm/h, respectively. Rates for the low and high nitrogen were 9 and 22 mm/h respectively. Results also indicate that surface sealing and soil frost are probably more important than tillage pans for infiltration. Residue cover eliminates any tillage effect on infiltration, while fertility is important in producing more crop biomass.

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