General Agriculture Resources
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Drip, trickle, microemitters, and subsurface irrigation systems are considered low-volume irrigation. Low-volume irrigation systems are designed to improve irrigation efficiency, delivering water to the crop accurately with minimal water loss. Irrigation efficiency can be categorized into two main concepts: water loss and uniform application. If water loss is significant, or application uniformity is poor, efficiency will be low. Generally, the most significant loss of irrigation water is from overwatering, where the water percolates below the root zone, or from runoff. With good management, losses due to leaks, system drainage, and flushing of filters and lateral lines should not exceed 1%. Low-volume systems have the opportunity to achieve efficiency, and under careful management, will minimize losses from overirrigation. However, using low-volume systems requires increased irrigation frequency and soil moisture monitoring should be used to improve water-use efficiency. This publication covers system design, system efficiencies, components, chemical applications, diseases related to irrigation, and soil moisture monitoring.
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Cover crops are in essential part of an organic production system. Cereal rye and crimson clover are cover crops that are commonly used. If organic cover crop production is a viable enterprise for growers, it could improve the availability of varieties adapted to the Southeast; provide a source for locally grown seeds; and be another profit center for growers, seed cleaners, and local seed companies.
This bulletin discusses what farmers need to know about producing cover crops organically and gives example enterprise budgets for cereal rye and crimson clover. A two-year on-farm trial indicated that producing organic cover crop seed may be profitable.
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Experimental power determinations are very important to agriculture and other applied sciences. It is necessary to be able to detect small differences when human and animal health or production profitability are in question. These documents help researchers estimate the power of their experiments.
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David R. Coyle, A. Brady Self, James D. Floyd, and John J. Riggins
Four species of Ips bark beetles (also commonly known as Ips engraver beetles or Ips beetles) occur throughout pure and mixed pine forests in the southeastern U.S.: the six-spined ips (Ips calligraphus), the pine engraver (Ips pini), the eastern five-spined ips (Ips grandicollis), and the small southern pine engraver (Ips avulsus). Ips beetles appear similar to other bark beetles in this region, including the southern pine beetle (SPB), black turpentine beetle, and red turpentine beetle. These beetles occur throughout the entire southeastern U.S., with the exception of the pine engraver and red turpentine beetle, which are found only in the Appalachian region.
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Private forest owners control most of the southern forest resource and are critical to maintaining forest health in the South. Record droughts, rising temperatures, increased frequency and intensity of wildfires, insect and plant invasions, and more intense storm events all pose threats to the health of Southern forests. Scientists project that increases in temperature and changes in rainfall patterns will cause these disturbances to become more common, occurring with greater intensity or duration. This pamphlet reviews healthy forest strategies and approaches to decrease the risks associated with these disturbances on your forestland.
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J. Holly Campbell and David R. Coyle, Southern Regional Extension Forestry
Littleleaf disease is a forest health concern for several pine species in the southeastern United States. This disease is a particular problem for shortleaf pine (Pinus echinata Mill.) and is one reason why this species is less widely planted compared with other pines. Littleleaf disease results from a combination of biological factors and site characteristics, when combined with a susceptible host tree. Some factors are more important – i.e., they have a primary role in disease formation – while others have a secondary role, and mostly contribute to making disease symptoms worse.
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C 1135
Silvics of Shortleaf Pine
Shortleaf pine is the most widely distributed, but perhaps least understood of the four major southern yellow pines. Growing in 22 states from southern New York to eastern Texas, it occupies the largest range of any pine in the southeastern United States. Its extensive distribution reflects it adaptability to a great variety of soil, average annual temperatures (48–70 °F), total precipitation (40–60 in.) and elevations (up to 3000 ft). Throughout much of its range, but especially in the East, it is a species of minor and varying occurrence often found growing with other pines and hardwoods. In Arkansas and Missouri, where it is the only naturally occurring pine, we find widespread areas of pure and mixed shortleaf-oak stands.
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Linda Wang, National Timber Tax Specialist, USDA Forest Service
Timber or landscape trees destroyed by the hurricane, fire, earthquake, ice, hail, tornado, and other storms are “casualty losses” that may allow the property owners to take a deduction on their federal income tax returns. The key for most cases is to figure out the “adjusted basis” of the timber. The “Adjusted Basis” of Timber Generally, the cost or the measure of your investment in the property you own is the property’s basis. The original basis is defined as follows: 1) for purchased timber property, it is the purchase price and related costs (such as legal fee and timber cruises); 2) for gifted timber property, it is the donor’s adjusted basis in most instances; 3) for inherited timber property, it is the fair market value (or alternative value if so elected) on the date of death (or alternative valuation date). The “adjusted basis” of a property is the original basis reduced or added by adjustments over the term of ownership (e.g., new purchase increases your timber basis while timber sale decreases your timber basis).
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Shortleaf pine and its associated plant communities evolved with fire of varied temperatures, or mixed severity, and a fire return interval, or frequency of 2–18 years. Across its wide range, shortleaf is found growing with blackjack, white, and post oaks; trees that have similar adaptive traits and fire resistance. The high diversity and number of herbaceous understory plants and wildlife found in shortleaf savannahs and woodlands is sustained with frequent prescribed burns. Due to its reliance on fire, foresters and ecologists commonly refer to shortleaf as fire resistant, fire resilient, fire dependent, or fire adapted. However, shortleaf pine is not fire-proof. And while fire provides many benefits there are risks. Some trees, particular seedlings and saplings will be damaged or destroyed from fire. Land managers must base the decision to burn on their overall management goals.
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