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Tillage and nitrogen placement effects on nutrient uptake by potato

Westermann, D.T. and Sojka, R.E. (1996) Tillage and nitrogen placement effects on nutrient uptake by potato. Soil Science Society of America Journal. 60:1448-1453.

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Deep tillage of compacted soils can improve potato (Solanum tuberosum
L.) tuber yield and quality if no other production factors are
limiting. We hypothesized that within-row subsoiling and N placement
would affect tuber yields and availability of plant nutrients. Potato
(cv. Russet Burbank) was grown after winter wheat (Triticum aestivum
L.) in 1989 and after dry bean (Phaseolus vulgaris L.) in 1990 on a
furrow irrigated Portneuf silt loam (coarse-silty, mixed, mesic Durixerollic
Calciorthid). Fall tillage treatments (disking, chiseling, and moldboard
plowing) were split with zone subsoiling after planting. Nitrogen
was broadcast before planting or banded beside the seed piece at
planting across all tillage combinations. We estimated plant nutrient
status and uptake each year with whole-plant and petiole samplings
during tuber growth. Final tuber yield and quality were determined
in early October. Fall tillage did not influence nutrient concentration
and uptake, tuber yield, or quality. Zone subsoiling increased average
plant dry weights 9%, total tuber yields 10% (4 Mg ha-1), and quality,
and increased P uptake an average of 11.6% (1.8 kg P ha-1) without
appreciably changing whole-plant or petiole P concentrations. Banding
N increased average plant dry weight 6.4%, total tuber yield 9%, and
N uptake 28% compared with broadcast N. Petiole NO3 -N, P, K, and
Zn concentrations were higher where N was banded. There were no
consistent zone subsoiling x N placement interactions. Higher nutrient
applications may be required with zone subsoiling or to compensate
for soil compaction problems

Item Type: Article
NWISRL Publication Number: 0921
Subjects: Irrigated crops > Potato
Soil > Tillage
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:54
Last Modified: 22 Nov 2016 22:39
Item ID: 670