Resources by David Holshouser
|Prevention and Control of Palmer Amaranth in Cotton||
Palmer amaranth (Amaranthus palmeri), a member of the "pigweed" family, is one of the most troublesome weeds in many southern row crops. Seed can germinate all season and plants can grow to over 6 feet in height. Plants have either male flowers that shed pollen or female flowers that can produce up to 600,000 seed per plant. One Palmer amaranth per 30 foot of row can reduce cotton yield by 6 to 12%.
|Mar 25, 2015||2805-1001 (PPWS-60NP)|
|Prevention and Control of Palmer Amaranth in Soybean||
Palmer amaranth (Amaranthus palmeri), a member of the "pigweed" family, is one of the most troublesome weeds in many southern row crops. Seed can germinate all season and plants can grow to over 6 feet in height. Plants have either male flowers that shed pollen or female flowers that can produce up to 600,000 seed per plant. One Palmer amaranth per meter of row can reduce soybean yield 32%.
|Jun 1, 2016||2808-1006 (PPWS-78NP)|
|Soybean Rust Incidence and the Response of Soybeans to Fungicides in 2007||May 1, 2009||2810-1016|
|Soybean Rust Incidence and the Response of Soybeans to Fungicides in 2008||Nov 19, 2009||2911-1420|
|Palmer Amaranth Control in Cotton: 2008 & 2009 Efficacy Experiments||Dec 22, 2009||2912-1428|
|Palmer Amaranth Control in Soybean: 2009 Efficacy Experiments||Dec 22, 2009||2912-1429|
|Green Stem Syndrome in Soybean||Dec 22, 2009||2912-1430|
|Average Relative Yields of Soybean Varieties Tested in the Virginia Official Variety Test 2007-2009||Apr 20, 2010||3004-1443|
|Suggested Soybean Seeding Rates for Virginia||Jun 11, 2010||3006-1447|
|Days to Soybean Physiological Maturity||Sep 9, 2010||3009-1459|
|Soybean Rust Incidence and the Response of Soybeans to Fungicides in 2009||Dec 21, 2010||3012-1520|
|Average Relative Yields of Soybean Tested in the Virginia Official Variety Test 2008-2010||Jan 25, 2011||3101-1530|
|2009-2010 Performance of Sorghum Hybrids in the Virginia‐Carolina Region||Jan 25, 2011||3101-1531|
|Soybean Choices and Challenges for Your Family||May 1, 2009||348-040|
|Tips for Profitable Variety Selection: How to Use Data From Different Types of Variety Trials||Jul 29, 2011||424-040|
|Agronomy Handbook, 2000||May 1, 2009||424-100||
|Virginia On-Farm Soybean Test Plots 2006||May 1, 2009||424-109-06|
|Planter/Drill Considerations for Conservation Tillage Systems||
No-till planters and drills must be able to cut and handle residue, penetrate the soil to the proper seeding depth, and establish good seed-to-soil contact. Many different soil conditions can be present in the Mid-Atlantic region at planting time. Moist soils covered with residue, which may also be wet, can dominate during the late fall and early spring and, occasionally, in the summer. Although this condition provides an ideal environment for seed germination, it can make it difficult to cut through the residue. In contrast, hard and dry conditions may also prevail. Although cutting residue is easier during dry conditions, it is more difficult to penetrate the hard, dry soils. Proper timing, equipment selection and adjustments, and crop management can overcome these difficult issues.
|Aug 8, 2014||442-457 (BSE-147P)|
|Precision Farming Tools: Variable-Rate Application||Aug 1, 2011||442-505|
|Precision Farming Tools: Soil Electrical Conductivity||May 1, 2009||442-508|
|Identifying Soybean Fields at Risk to Leaf-Feeding Insects||May 1, 2009||444-203|
|Asian Soybean Rust - Frequently Asked Questions I: Background and General Information||May 1, 2009||450-301|
|Asian Soybean Rust - Frequently Asked Questions II: Identification, Biology, and Ecology||May 1, 2009||450-302|
|Asian Soybean Rust - Frequently Asked Questions III: Control with Fungicides||May 1, 2009||450-303|
|Asian Soybean Rust - Frequently Asked Questions IV: Cropping Systems and Cultural Practices||May 1, 2009||450-304|
|Soybean Disease Control: Response of Soybeans to Foliar Sprays of Fungicides in 2005||May 1, 2009||450-561|
|Soybean Rust Incidence and the Response of Soybeans to Foliar Fungicides in 2006||
The spread of soybean rust northward through states along the Atlantic Coast began on soybeans in Alabama, Georgia, and Florida. The disease was first reported in South Carolina on 21 August, North Carolina on 14 September, and Virginia on 9 October. The epidemic of 2006 was far reaching in that disease outbreaks occurred on soybeans as far north as Illinois and Indiana and east to Virginia
|May 1, 2009||450-562|
|Virginia On-Farm Soybean Test Plots 2016||
These demonstration and research plot results are a collaborative effort of Virginia Cooperative Extension (VCE) Agents and Specialists, area producers, and agribusiness. The purpose of this publication is to provide research-based information to aid in the decision-making process for soybean producers in Virginia. It provides an unbiased evaluation of varieties, management practices, and new technologies through on-farm replicated research using producer equipment and time. These experiments enable producers to make better management decisions based on research and provide greater opportunities to improve yields and profits, which improves quality of life for them and their families.
|Jan 13, 2017||ANR-244NP|
|2009-2011 Performance of Sorghum Hybrids in the Virginia-Carolina Region||
Based on data from the U.S. Grain Council (www.grains.org), grain sorghum is the third most important cereal crop grown in the United States and the fifth most important cereal crop grown in the world. The United States, with approximately 9.7 million acres harvested in the 2009-10 cropping season, is the world’s largest producer of grain sorghum, followed by India and Nigeria. Sorghum production in the U.S. is concentrated in the central and southern plains of five states — Kansas, Texas, Nebraska, Oklahoma, and Missouri — representing approximately 89 percent of total production. In many parts of the world, sorghum has traditionally been used for food. In the United States, sorghum is primarily used for animal feed, but also for food and industry derivatives such as wallboard and biodegradable packaging materials. Recently, sweet sorghums have been considered for bioenergy feedstock production.
|Apr 25, 2013||AREC-11P|
|Average Relative Yields of Soybean Tested in the Virginia Official Variety Test 2009-2011||Mar 22, 2012||AREC-17NP|
|Virginia Soybean Performance Tests 2015||
The purpose of this publication is to provide performance data of the many soybean varieties offered for sale in Virginia. These data should be of benefit to producers and agribusinesses in making selections of varieties for their use. It is realized that not all varieties that are offered for sale in Virginia are included in these tests. There is no implication that varieties not included are inferior in any way, but only that they have not been tested.
|Feb 19, 2016||AREC-170NP|
|Virginia Soybean Performance Test 2016||Mar 29, 2017||AREC-209NP|
|Troubleshooting The Soybean Crop||Nov 16, 2012||AREC-25NP|
|Average Relative Yields of Soybean Tested in the Virginia Official Variety Test 2010-2012||Mar 1, 2013||AREC-35NP|
|Virginia Soybean Update||
The Virginia Soybean Update Blog provides Extension agents, farmers, and crop advisers updates about soybean field conditions and practices that may need implementation in the near future. Detailed articles are largely taken from the Virginia Soybean Update newsletter, which is published monthly during the soybean growing season. Shorter updates are published weekly.
|Jul 10, 2013||AREC-49NP|
|Soybean Reproductive Development Stages||
Remove the soybean plant at ground level to make it easier to stage. Examine each main stem node one at a time to determine the development stage. Focus on the top four nodes that contain fully developed leaves (shown below). A fully developed leaf is one that is located immediately below a node containing a leaf with unrolled or unfolded leaflets (leaflet edges are no longer touching). The soybean crop is considered to be at a particular stage when 50% of the plants reach that stage. Listed with stage description for R1 through R6 are the approximate number of days to R7, or physiological maturity, for full season (FS) soybean planted in May and double crop (DC) soybean planted in June/July.
|Nov 25, 2013||AREC-59NP|
|Soybean Neamtode Management Guide||Jan 2, 2012||AREC-1|
|Double Cropping Soybeans In Virginia||
Double cropping is simply growing and harvesting two crops in one year. In the mid-Atlantic region of the United States, soybeans are commonly double-cropped after a winter small-grain crop, usually wheat. However, double cropping is not limited to the small-grain-soybean system. Other crops, such as grain sorghum or even corn, could fit into a double-cropping system with small grains. Soybean can be grown after other winter crops, such as canola, or after a spring crop, such as snap beans. As long as both crops can complete their development in time to allow profitable production of the entire system, numerous double-cropping systems are possible.
|Mar 11, 2015||CSES-102NP (CSES-104NP)|
|Roadside Survey of Continuous No-till and Cover Crop Acres in Virginia||
In 2009, the Chesapeake Clean Water Ecosystem Restoration Act (HB 3852/S 1816) was passed, and was intended to strengthen certain standards for the Chesapeake Bay, particularly, to address nonpoint source pollution. Nonpoint source pollution includes that of urban, suburban and agricultural runoff. Cited in the bill was the need to establish and codify the Bay-wide pollution budget, or Total Maximum Daily Loads, (TMDL) for nitrogen, phosphorous and sediment that EPA was in process of developing for the Bay. Hence all states and their perspective watersheds would have pollution caps for all sources of pollution.
|Oct 13, 2014||CSES-103NP|
|The Nutrient Value of Straw||
The mature and dried stem, leaves, and chaff remaining after barley and wheat are harvested is known as straw. Many farmers around Virginia harvest straw by baling in small bales, large round bales, or large square bales that range in weight from 40 to 1,000 lbs. plus per bale.
|Jun 19, 2015||CSES-126NP|
|Soybean Growth and Development||
Proper management of the soybean crop requires knowledge of how environmental conditions and pests affect growth during vegetative and reproductive stages. For example, too little or too much soil moisture at certain stages may hinder growth and lower yield, and insect pests may damage the crop at one stage but not another. The information below can help you determine the proper timing of various management practices.
|Nov 13, 2015||CSES-134NP|
|Predicting Soybean Reproductive Stages in Virginia||Oct 7, 2017||CSES-197P|
|2017 Virginia On-Farm Soybean Test Plots||Jan 4, 2018||CSES-223NP|