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Pinto Bean Response to Starter Phosphorus Fertilizer (05/09/19)

The following are highlights of nearly a decade of NDSU phosphorus-based starter fertilizer trials conducted at the Carrington REC.

The following are highlights of nearly a decade of NDSU phosphorus-based starter fertilizer trials conducted at the Carrington REC. The trials evaluated pinto bean response, primarily with liquid 10-34-0 fertilizer, applied using different methods and rates in loam soil which generally testing low in phosphorus.

*Pinto bean seed yield increased more than 3 hundredweight (cwt) per acre with in-furrow (IF, meaning fertilizer placed directly with seed)
10-34-0 applied at 2 to 3 gallons per acre (gpa), compared with the untreated check. However, seed-placed fertilizer can cause bean stand reductions, especially in dry, coarse-textured soils or with high fertilizer rates.

*Yield was similar with IF- and band-applied (2 inches horizontally placed from planted seed)
10-34-0 at 3 to 6 gpa, although the plant population was reduced with IF application.

*Broadcast or midrow (centered between 22- or 30-inch rows) band-applied 10-34-0 did not increase yield.

*Yield was similar between low (2.5 to 3 gpa) and high (5 to 6 gpa) rates of IF-applied 10-34-0. The high fertilizer rate reduced the plant population.

*The plant population and yield were similar between IF-applied 10-34-0 and the low-salt fertilizer 6-24-6.

More information about this research is available in NDSU Extension publication “Pinto Bean Response to Phosphorus Starter Fertilizer in East-central North Dakota.” It is available online at https://www.ag.ndsu.edu/crops/dry-bean.

10.ats.2

Greg Endres

Extension Cropping Systems Specialist

NDSU Carrington Research Extension Center

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