Narrow Row Soybeans Alternative Systems

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Soybean composition as affected by variety and weather, and its importance in the world market

Ohio Soybean Counci

Corn Growth Retardation Resulting from Soybean Herbicide Residues

Author Institution: Department of Agronomy, The Ohio State UniversityImazaquin (trademark Scepter) is a weed control herbicide that was used on 15 and 37% of Ohio's 1987 and 1988 soybean acreage, respectively. Drought conditions in 1987 retarded the microbiological decomposition of imazaquin, resulting in carryover that damaged corn {Zea mays L.) grown in those fields so treated. Ohio's farmers were concerned that the more severe 1988 drought would cause even more herbicide carryover, jeopardizing their 1989 corn corp. In early 1989, imazethapyr (trade name Pursuit), another soybean herbicide chemically similar to imazaquin, received federal registration for use in the 1989 soybean crop

Cutting and environmental effects on growth and regrowth of a sorghum-sudangrass hybrid, cultivar sudax sx-11

Summer annual forages are an important part of the forage program of beef and dairy farmers in Tennessee. In 1966, approximately 140,000 acres of sudangrasses, pearlmillets, and sorghum-sudangrass hybrids in pure stand were grown in Tennessee. This was an increase of 100 per cent from 1961 when only 70,000 acres of the crops were grown. When used as a supplemental forage, the sorghum-sudangrass hybrids help maintain a high level of production during the summer months when unfavorable climatic conditions often bring about a decrease in produc-tion and quality of perennial forage. Although sorghum-sudangrass hybrids are accepted and widely used by farmers, very little is known about their growth and regrowth after harvesting. In order to maximize yields and profits the farmer must know when to harvest a crop for the most suitable combination of yield and quality. The expected amount and the rate of dry matter production after one or more harvests is of vital importance. An experiment was conducted to determine the effects of environ-ment and cutting management on the growth rates and regrowth rates after harvest of a sorghum-sudangrass hybrid. Dry matter production curves were constructed for different combinations of planting date and number of harvest. An attempt was made to relate the dry matter production to plant morphological characteristics such as stem-leaf ratio and height of apical meristem, as well as several environmental factors. Statistics and graphical techniques were used to illustrate the relationships

Effects of Phosphorus and Copper on Factors Influencing Nutrient Uptake, Photosynthesis, and Grain Yield of Wheat

Author Institution: Department of Agronomy, The Ohio State UniversityApplication of large amounts of phosphorus fertilizers is used to enhance early plant growth and yield of wheat (Triticum aestivum L.). This practice can lead to an accumulation of phosphorus in soil and a reduced copper uptake by plants which may result in a reduction of plastocyanin concentrations in chloroplasts. As a result, photosynthetic rates and crop yield can be adversely affected. While copper uptake is sometimes enhanced by vesicular-arbuscular mycorrhizal (VAM) fungi, large accumulations of soil phosphorus can reduce VAM-enhanced copper uptake

Reducing Crop Production Cost

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Most Asked Agronomic Questions

Exact date of bulletin unknown.PDF pages: 4