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Bean trials respond to phosphorus-based starter fertilizer

Seed-placed fertilizer can also cause bean stand reductions in dry, coarse-textured soils or with high fertilizer rates

Phosphorus-based starter fertilizer can increase pinto bean seed yield, North Dakota State University studies have shown.

That finding is the result of nearly a decade of NDSU phosphorus-based starter fertilizer trials conducted at the Carrington Research Extension Center.

“The published research summary should assist… farmers as they make pinto bean plant nutrition plans for the upcoming crop season,” said Greg Endres, extension cropping systems specialist at NDSU.

The trials evaluated pinto bean response primarily with liquid 10-34-0 fertilizer applied using different methods and rates in loam soil generally testing low in phosphorus.

Pinto bean seed yield increased more than three hundredweight (approximately 150 kilograms) per acre with in-furrow (IF) fertilizer (fertilizer placed directly with seed) applied 10-34-0 at two to three gallons per acre (gpa), compared with the untreated check.

However, Endres noted that seed-placed fertilizer can cause bean stand reductions, especially in dry, coarse-textured soils or with high fertilizer rates.

Yield was similar with in-furrow and band-applied (two inches horizontally placed from planted seed) fertilizers applied 10-34-0 at three to six gpa, although the plant population was reduced with in-furrow application.

Broadcast or mid-row band-applied fertilizers (centred between 22- or 30-inch rows) at 10-34-0 did not increase yield.

Yield was similar between low (2.5 to three gpa) and high (five to six gpa) rates of in-furrow application applied 10-34-0. The high fertilizer rate reduced the plant population.

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

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