Comprehensive Study Guide on Rangeland Management, Economics, and Wildlife Interactions

Principles of Natural Resource and Integrated Rangeland Planning

Integrated resource planning is defined as a systematic approach to the management of natural resources. In the context of rangelands, long-range planning specifically involves trend analysis, which focuses on evaluating trends in resource supply and demand over extended periods. Macroeconomics focuses on the behavior of the economy as a whole, while microeconomics focuses on the behavior of individual components and units. Economic growth refers to the expansion of the total supply of goods and services available to a human population.

Calculations for determining the viability of range projects often include the internal rate of return, which compares the rate of return for a specific project to the interest of the funds used. Present net worth and benefit-cost analysis are additional tools used to evaluate economic feasibility. Within a centrally planned or command economy, the government makes all production and distribution decisions, controls factors of production, and promises equitable distribution of income alongside full employment. In market-based economies, market mechanisms allow consumers to obtain an optimum combination of goods and services relative to their income, while competition among producers serves to maintain a balance between prices, supply, and demand.

Factors Influencing Ranching Profitability and Economic Efficiency

Ranching is defined as the raising of livestock on rangelands specifically to meet the food and material needs of humans. Professional ranching profitability and efficiency are influenced by several factors, including cattle prices and business cycles, ranching location, and the specific costs of range livestock production. Ranchers often restrict their investments to the ranch itself due to a lack of liquidity, a lack of knowledge regarding alternative investments, or more favorable returns from rangeland activities. Historically, cattle price cycles follow a pattern of $6$ to $7$ up-years followed by $3$ to $5$ down-years.

Costs of production are categorized into fixed and variable costs. Fixed costs of rangeland production include depreciation, land taxes, and insurance. Government cost-sharing programs often assist rangeland managers with expenses related to brush control, range seeding, and water development. An externality in rangeland economics is the cost of an economic activity borne by a third party who was not part of the original transaction. Additional economic concepts relevant to management include liquidity and opportunity costs.

Energy Efficiency and Range Livestock Production

High energy costs significantly impact meat production strategies. Increases in oil prices enhance the importance of rangelands for meat production because rangeland beef cattle production involves a lower use of fossil fuel inputs compared to animals finished on grain. High oil prices make it financially ineffective to finish cattle on grains for long periods of time. Conversely, low oil prices can make it unfeasible to raise cattle using high inputs of harvested forage and feed grains because the cost of transport and processing is reduced for competing systems.

Vegetation Manipulation and Rangeland Enhancement

Manipulation of rangeland vegetation is a critical tool for increasing productivity. Control of unwanted plants, revegetation, or fertilization can result in production increases of twofold to tenfold within $1$ to $3$ years. One of the most effective and natural tools for vegetation manipulation is fire (burning), which is often cheaper and more natural than herbicides. However, successful burning requires sufficient fuel (litter) to carry a ground fire. The rate of fire spread is impacted by topography; as the steepness of a rangeland slope increases, the rate of fire spread increases.

Drill seeding is considered the superior method for planting seed where site conditions permit, as opposed to broadcast seeding, which involves scattering seed on the soil without coverage. Mechanical control methods like hand-grubbing are most effective during the early invasion stage of unwanted plants. Targeted grazing is another low-cost, low-risk, and natural approach for controlling certain noxious plant species.

Fertilization also plays a role in vegetation management. Cool-season plant species respond most effectively to nitrogen fertilization during the late fall or early spring. Chemical control involves herbicides; translocated herbicides, such as $2,4-D$, are applied to one part of the plant and are subsequently carried to other plant tissues. Noxious plant invasions are typically caused by overgrazing by domestic livestock, reduction of fire, or climatic fluctuations. Most public and private rangelands in the western U.S. currently experience some level of disturbance, such as brush, weed, or accelerated erosion problems, which adversely affect productive capacity.

Strategic Use of Prescribed Burning

Prescribed burning on rangelands is utilized to achieve multiple objectives:

• Increased or improved livestock forage by reducing or eliminating competing plants.
• Reduced litter and increased growth of desirable forage plants.
• Improved wildlife habitat.
• Fuel reduction with the long-range goal of lowering the chance of catastrophic wildfire in forest and chaparral types.
• Reduced labor costs for handling cattle and horses.

Burning can affect the palatability and availability of forage as cattle tend to congregate on recent burns to access tender, succulent new growth. However, it can also significantly affect soil nutrients by decreasing the availability of nitrogen, phosphorus, and sulfur to plants.

Wildlife Habitat and Livestock Grazing Interactions

Moderately grazed rangelands generally support more diverse wildlife populations compared to those that are heavily grazed or ungrazed. Livestock grazing affects wildlife habitat through direct and indirect impacts. Direct impacts include the removal or trampling of vegetation used as food, the defoliation of wildlife food sources, and the overgrazing of riparian areas. Indirect impacts include changes in vegetation composition and reductions in plant species diversity.

Habitat heterogeneity is a principal factor in managing for diverse wildlife. This heterogeneity is created through combinations of grazing practices, fire, and the activities of burrowing animals. Grazing is considered to have the greatest potential for managing heterogeneity in the Great Plains because it is the most common use of the land. Uncontrolled or heavy grazing can have negative effects, such as reduced food supply, reduced cover, stress due to social interaction, and disease transmission to wildlife. Research indicates that grasshoppers are more numerous on heavily grazed rangelands than on those that are moderately or lightly grazed.

Specific Habitat Requirements and Environmental Management

Different wildlife species require specific habitat structures within the rangeland mosaic:

• Bare Ground or Sparse Vegetation: Ideal for the long-billed curlew, chestnut-collared longspur, horned lark, mountain plover, and common nighthawk.
• Sparse Vegetation Transitioning to Thick: Suitable for the grasshopper sparrow and western meadowlark.
• Thick Vegetation: Ideal for the lark sparrow and dickcissel.
• Shrubby Vegetation: Ideal for the lark sparrow, dickcissel, field sparrow, and loggerhead shrike.

The addition of shelterbelts (rows of trees) to native rangelands provides cover, shade, and nesting sites for some birds and small animals (e.g., turkeys and deer). However, they are detrimental to many native rangeland species because they serve as shelter for mammalian predators and perches for raptors, fragmenting the open habitat required by rangeland fauna.

Animal Selection and Poisonous Plant Management

The productivity of a ranch is largely determined by animal selection, specifically based on animal kind, animal breed, and animal class. Common-use grazing (grazing more than one type of animal, such as cattle and sheep) can substantially increase livestock production, promote better distribution of animals, diversify income, and reduce the risk from poisonous plants. Cattle raising has lower labor requirements and fewer predator problems than sheep, whereas sheep produce two products (wool and meat). Goats provide higher returns in areas dominated by oak vegetation.

Management of poisonous plants is essential for livestock health. Managers can prevent poisoning by maintaining good forage so animals are not forced to eat toxic plants and by providing adequate salt, as a lack of salt may cause animals to consume more vegetation than normal. It is critical not to place animals on ranges with poisonous plants when they are hungry or have been on dry feed.

One specific concern is milkweed, which contains resins that affect muscular and nervous tissues. If consumed in large amounts, milkweed can lead to paralysis or "wooden tongue." While the USDA National Resource Conservation Service (NRCS) offers incentives to plant milkweed to replenish monarch butterfly habitats, ranchers must exercise caution if livestock are present in those pastures. In developing countries, excessive livestock numbers and indiscriminate burning present complex challenges that are not easily resolved. Commoditization in these regions involves shifting pastoral households toward commercial products for sale.