Determinate semi-dwarf and semideterminate soybean varieties

"Several environmental factors affect the productivity of soybeans. Among them are water, nutrients and light. When water and nutrients are deficient, they can be supplied artificially by using irrigation and fertilization. Plants don't always intercept and use all of the available light. The efficiency with which the plant intercepts light is influences by such features as leaf area and how the leaves are displayed. Lodging is one factor influencing efficient light interception and use. It can be controlled by genetic manipulation."--First page.Zane R. Helsel and Harry C. Minor (Department of Agronomy, College of Agriculture)New 6/82/8

Determinate semi-dwarf and semi-determinate soybean varieties

"Several environmental factors affect the productivity of soybeans. Among them are water, nutrients and light. When water and nutrients are deficient, they can be supplied artificially by using irrigation and fertilization. Plants don't always intercept and use all of the available light. The efficiency with which the plant intercepts light is influenced by such features as leaf area and how the leaves are displayed. Lodging is one factor influencing efficient light interception and use. It can be controlled by genetic manipulation."--First page.Zane R. Helsel and Harry C. Minor (Department of Agronomy, College of Agriculture)Revised 2/87/8

Soybean variety selection

"One of the most perplexing production decisions a farmer faces is, "What variety should I plant?" You receive information on soybean varieties from mass media advertising, from friends or relatives, from seed dealers, from University and extension variety trials, and perhaps from your own strip trials. New varieties from both public and private organizations are abundant. Yields are increasing about one-third of a bushel per acre per year due to genetic improvement. While some new varieties show this response, other new varieties may not yield better than those you use now. Given all this information and the new influx of varieties, how do you choose the best variety to grow? No one has yet developed a simple answer to this question, but it is the intent of this publication to present guidelines for choosing a variety for a given set of conditions."--First page.Zane R. Helsel and Harry C. Minor (Department of Agronomy College of Agriculture)New 11/84/10

Soybean production in Missouri (1993)

In recent years, farmers in Missouri have grown soybeans on more than five million acres. Soybeans were the most economically successful crop for Missouri farmers in the 1970s and early 1980s. Although weather conditions in Missouri can greatly affect the productivity and economics of soybean production, many production practices can be managed to produce more favorable yields and better economical returns. This guide provides a brief overview of recommended production practices for soybeans in Missouri

Soybean variety selection (1993)

One of the most perplexing production decisions a farmer faces is, 'What variety should I plant?' Information on soybean varieties is received from mass media advertising, friends or relatives, seed dealers, University and extension variety trials, and perhaps from your own strip trials. New varieties from public and private organizations are abundant. Yields are increasing about one-third of a bushel per acre per year due to genetic improvement. While some new varieties show this response, other new varieties may not yield better than those now used. Given all this information and the new influx of varieties, how do you choose the best variety to grow? No one has yet developed a simple answer to this question, but it is the intent of this publication to present guidelines for choosing a variety for a given set of conditions

Wheat-soybean double crop management in Missouri

"Double cropping soybeans after winter wheat has grown in popularity and feasibility in much of Missouri. This cropping system has several advantages. A crop, growing on the land all year, provides control of soil erosion. If you spread annual fixed costs such as land, taxes, and machinery over two crops instead of one, you increase gross returns per acre with relatively low increases in production costs. Thus, you can increase profits per acre. A successful wheat-soybean double crop depends on management and weather conditions. Establishing an adequate soybean stand and effective weed control are critical. In north Missouri, there are few days left in the season after wheat harvest for planting soybeans, and that's a constraint. So knowing the conditions to which doublecropping is best adapted will provide for a successful second crop. Also, it will enable you to avoid those years of high risk."--First page.Harry C. Minor, Zane R. Helsel, and Sean McCrate (Department of Agronomy, College of Agriculture)New 10/83/10

Drilled soybeans in Missouri

"Drilled (solid) seeding of soybeans is a continually growing practice in Missouri. More than 1 million acres were drilled in 1986, compared to just 300,000 acres in 1979. Solid seeding was predominant when soybeans first became popular in Missouri and the cropo was used primarily for hay. At that time, some weed growth in the hay crop was tolerable. As emphasis shifted to production for beans, producers shifted to row culture to permit cultivation for weed control."--First page.Harry C. Minor and Zane R. Helsel (Department of Agronomy), and Marion Gentry (Area Agronomy Extension Specialist, College of Agriculture)Revised 8/87/6

Drilled soybeans in Missouri (1993)

Drilled (solid) seeding of soybeans is a continually growing practice in Missouri. More than 1 million acres were drilled in 1986, compared to just 300,000 acres in 1979. Solid seeding was predominant when soybeans first became popular in Missouri and the crop was used primarily for hay. At that time, some weed growth in the hay crop was tolerable. As emphasis shifted to production for beans, producers shifted to row culture to permit cultivation for weed control. Improvements in soybean chemical weed control materials now allow adequate control of most weeds in solid-seeded stands. Because they can control weeds, farmers are returning to solid seeding to increase yields. Several long-term research projects (some sponsored by your soybean checkoff dollars) have allowed us to evaluate the yield potential and economics of solid-seeded soybeans throughout Missouri. The following discussion reports some of the important findings of those studies and recommended production practices

Analyzing cropping systems (1983)

In tight financial times, businesses often try to reduce spending and improve their profits. Many farmers are currently operating their businesses under such conditions. Wise management decisions can improve profits in farming while reducing cash flow needs

Nitrogen and phosphorus loads to temperate seepage lakes associated with allochthonous dissolved organic carbon loads

Terrestrial loads of dissolved organic matter (DOM) have increased in recent years in many north temperate lakes. While much of the focus on the “browning” phenomena has been on its consequences for carbon cycling, much less is known about how it influences nutrient loading to lakes. We characterize potential loads of nitrogen and phosphorus to seepage lakes in northern Wisconsin, USA, based on a laboratory soil leaching experiment and a model that includes landscape cover and watershed area. In these seepage lakes, nutrient concentrations are positively correlated with dissolved organic carbon concentrations (nitrogen: r = 0.68, phosphorus: r = 0.54). Using long‐term records of browning, we found that dissolved organic matter‐associated nutrient loadings may have resulted in substantial increases in nitrogen and phosphorus in seepage lakes and could account for currently observed nutrient concentrations in the lake. “Silent” nutrient loadings to brown‐water lakes may lead to future water‐quality concerns. PLAIN LANGUAGE SUMMARY: The color of many temperate lakes is changing; some lakes are becoming more darkly stained brown. The tea‐colored stain is due to dissolved organic matter from the surrounding landscape. Much of the research related to the causes and consequences of increased staining, or “brownification,” relate to its connection to the carbon cycle. However, by examining long‐term lake chemical records, analyzing the properties of the organic compounds, and modeling potential flows of the compounds, we find that carbon is not the only element that is influenced by browning. Nitrogen and phosphorus, two nutrients important to growth of organisms at the base of the food web, may also be increasing in lakes due to brownification."Funding for this research was supported by the Northern Research Station and the Chequamegon-Nicolet National Forest (CNNF) of the United States Department of Agriculture (USDA) Forest Service and a National Science Foundation (NSF) grant to the University of Wisconsin-Madison to support the North Temperate Lakes Long-Term Ecological Research (NTLLTER) Site (DEB-#1440297)."https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL07721