Soybean Yield and Quality in Relation to Soil Properties

Abstract

To optimize management, farmers require quantitative understanding of the factors aff ecting variability in soybean [Glycine max (L.) Merr.] seed yield and quality. Our objectives were to characterize spatial variation in soybean seed yield, oil concentration, and protein concentration in two south-central Minnesota fi elds over 6 yr of a corn [Zea mays L.]-soybean rotation, and to determine the infl uence of fertilizer treatments, soil chemical properties, and topography on soybean yield, oil, and protein. Soil and topographical variables were observed on 0.014-ha cells, and included Bray P1, Olsen P, K, Zn, pH, organic matter, total organic C, NH 4 -N, NO 3 -N, total N, mineralizable N, elevation, slope, curvature, fl ow accumulation, and aspect. Soybean yields consistently exhibited spatial structure. Within fi elds, spatial patterns of soybean yields were highly correlated across years, and we observed consistent relationships between yield and soil variables. Overall, soybean yield related positively to soil P and Zn and negatively to pH at all site-years. Models of soybean yield in relation to soil P and Zn indicate that in high pH soils at these sites, yield is optimized when soil P and Zn levels are higher than current extension recommendations. Protein and oil concentrations exhibited inconsistent spatial structure, and the spatial pattern of protein and oil concentrations diff ered across years. Relationships between soybean quality and soil properties were more consistent between sites within years than across years within sites, indicating that soybean quality is infl uenced by soil-climate interactions that function on a regional basis.

Effect of Tillage System and Soil Conditioner Application on Soybean (Glycine Max (L.) Merrill.) and Its Crop Management Economic Indicators

“…Yield and quality parameters of soybean are affected by many factors, but the appropriate interaction of soil and climatic factors that already exist at the regional level (Anthony et al 2012), is essential.…”

Relationship between Phosphorus Accumulation and Dry Matter Production in Soybeans

“…Shoot or seed dry weight reached a plateau at high P application treatments. Anthony et al (2012) showed that the soybean yield was optimized at an available P level of about 15 mg kg -1 . Slaton et al (2013) suggested that the optimum available P level was 36 -50 mg kg -1 , and that P fertilization scarcely affects the growth in soil with sufficient P. The available P in the soil of the pots was 2.6 mg kg -1 , and that of our experimental fields was 11.7 -16.0 mg kg -1 at Setagaya and 92.8 -150.7 mg kg -1 at Atsugi (Table 2).…”

Co-Granulated and Blended Zinc Fertilizer Comparison for Corn and Soybean

“…Fertilizer applications to corn in a corn-soybean rotation had inconsistent effects on soybean yield and seed quality. Anthony et al (2012) and Buah, Polito, and Killorn (2000) reported no difference in yield between 0 and 56 kg P ha -1 . However, others have shown increased yields, but at low soil test P levels (Borges & Mallarino, 2000.…”