Phosphorus Fertility Relationships of Central Washington Irrigated Soils (with special emphasis on exposed calcareous subsoils)

James, D.W. and Leggett, G.E. and Dow, A.I. (1967) Phosphorus Fertility Relationships of Central Washington Irrigated Soils (with special emphasis on exposed calcareous subsoils). Washington State University Bulletin No. 688. 18 pp.

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Abstract

To facilitate irrigation in central Washington, land
is leveled or smoothed on a broad scale. As a result, the
calcareous and extremely infertile subsoils are exposed
and used directly as a medium for plant growth. Phosphorus
fertilizer requirements of exposed subsoils were
determined by measuring crop yield and P uptake on
plots that were fertilized in the current and one, two
or three preceding seasons. Annual crops used as indicators
of P availability at three sites were field beans,
Sudangrass and sugar beets. A supplementary experiment
involved fertilization of a previously established
alfalfa crop. Crop growth and P uptake results were
correlated with sodium bicarbonate soil testing

Item Type:	Technical Bulletin
NWISRL Publication Number:	0105
Subjects:	Soil > Calcareous soil Soil > Fertility Soil > Chemistry > Phosphorous Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:57
Last Modified:	31 Oct 2016 16:15
Item ID:	1133
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1133