Stan R. Spurlock

Yield and economics of traditional and early soybean production system (ESPS) seedings in the midsouthern United States

Abstract Drought stress reduces yield of traditional May and June seedlings of soybean in midsouthern USA. Field experiments using Maturity Group (MG) IV and MG V soybean cultivars were conducted at Stoneville, Mississippi (latitude 33°26′ N) for five years to determine effects of earlier-than-normal (April) and normal (May) seeding on net returns from soybean grown with, and without, irrigation. Net returns were calculated as the difference between income and all direct and indirect costs excluding those for land, management, and general farm overhead. In the irrigated environment, average net returns from April seedings of MG IV cultivars were greater than those from May seedings in all years, while average net returns from April seedings of MG V cultivars were greater than those from May seedings in all years except 1997. These greater net returns resulted from larger seed yields, lower estimated costs, higher prices received for harvested seed, or a combination of the three. Average net returns from April seedings ranged from US

Economic impact of fishing, hunting, and wildlife-associated recreation expenditures on the Southeast U.S. regional economy: an input-output analysis.

148 to US

Economic analysis of irrigation and deep tillage in soybean production systems on clay soil

617/ha, while average net returns from May seedings ranged from US

Economic Impact of the Farm-Raised Catfish Industry on the Mississippi State Economy

69 to US

Influence of early-season nitrogen and weed management on irrigated and nonirrigated glyphosate-resistant and susceptible soybean

567/ha. Use of MG IV vs. MG V cultivars had no consistent effect on net returns from either April or May seedings. In the nonirrigated environment, average net returns from April seedings of all cultivars were greater than those from May seedings in all years. Average annual net returns from cultivars seeded in April ranged from US

Risk Analysis and Sustainability of Alternative Cotton Production Systems in Mississippi

74 to US

Optimal replacement age of a conventional cotton harvester system

374/ha, while average annual net returns from May seedings ranged from US

Deep Tillage and Crop Rotation Effects on Cotton, Soybean, and Grain Sorghum on Clayey Soils

−9 to US

Profitability and nitrogen rate optimization associated with winter cover management in no-tillage cotton

325/ha. In three of the five years, MG V cultivars sown in April produced more yield and greater net return than did MG IV cultivars, while April-sown MG IV cultivars produced the highest yield and net return in one of the five years in the nonirrigated study. These results indicate that earlier-than-normal (April) seedings of either MG IV or MG V soybean cultivars will result in increased net return vs. that attained from traditional (May or later) seedings in the midsouthern USA. These results also indicate that choosing cultivars within an MG is more critical than choosing between MG IV and V.

Net returns from eight nonirrigated cropping systems on clay soil

Wildlife-associated recreation expenditures make significant contributions to employment, value added, and inter-industry transactions, and promote conservation and environmental goals. Using 2006 expenditures incurred by anglers, hunters, and wildlife-watching recreationists in the Southeast region of the United States, this study quantified economic impacts of recreation expenditures for fishing, hunting, and wildlife watching using input–output analysis. Results are presented in absolute terms and relative to the Southeast regional economy and to wildlife expenditures nationwide. In total, the US