Spray patterns from fan-type nozzles for applying PAM to soil surfaces

Kincaid, D.C. and Lentz, R.D. and Lehrsch, G.A. (1996) Spray patterns from fan-type nozzles for applying PAM to soil surfaces. pp. 457-466. In: Proc. of Conf. 27. Erosion control technology … bringing it home. USA-WA-Seattle, 1996/02/27-03/01. Int. Erosion Control Assoc., Steamboat Springs, CO.

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Abstract

When applied to the soil surface, polyacrylamide (PAM) may stabilize soil surface
aggregates, inhibit crust formation and reduce soil erosion during surface or sprinkler
irrigation, or rainfall. Thus, PAM maintains high water infiltration rates, and enhances seedling
emergence in treated soils. In spray applying PAM, it is desirable to apply stock solution at
high concentrations to minimize the total volume of solution applied per unit area. The
hypothesis was tested that PAM solutions would alter spray characteristics of nozzles. It was
found that the spray pattern from typical fan-type nozzles was altered significantly as the
PAM concentration was increased from zero (pure water) to 1200 PPM, where the spray
coalesced into a concentrated stream. The pattern began to change significantly at
concentrations between 300 and 600 PPM. Higher pressures are recommended for PAM
application at 600 PPM or higher. These results should be useful in designing spray
equipment to apply PAM and similar materials to soils for erosion control or plant establishment.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	0900
Subjects:	Irrigation > Sprinkler irrigation Polyacrylamide (PAM) > Water-soluble PAM (WSPAM) Soil Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:55
Last Modified:	22 Nov 2016 23:00
Item ID:	873
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/873