D

digestibility trial: A test to measure the digestibility of a known food by recording the weight of food eaten and then excreted. Conducting digestibility trials is important for evaluating the nutritional value of animal diets. Farmers should work with veterinarians and nutritionists to perform digestibility trials and develop balanced and nutritious diets for their livestock. Understanding the results of digestibility trials will aid in effective feed management and improved farm productivity.

digestive enzymes: Enzymes which speed up the process of digestion. Providing digestive enzymes can improve the efficiency of nutrient absorption in livestock. Farmers should work with veterinarians and nutritionists to include digestive enzymes in animal diets as needed. Understanding the benefits and applications of digestive enzymes will aid in effective feed management and improved farm productivity.

digestible: Able to be digested. Glucose is an easily digestible form of sugar. Providing digestible nutrients is essential for maintaining the health and productivity of livestock. Farmers should work with veterinarians and nutritionists to ensure that animal diets are highly digestible and promote optimal health. Understanding the importance of digestible nutrients will aid in effective feed management and improved farm productivity.

dam: The mother of an animal. Knowing the lineage and health of the dam is important for breeding programs and offspring quality.

drill coulter: A coulter that makes a furrow for sowing seed. Drill coulters are essential for precision planting, helping to create uniform seed rows and improve crop establishment.

disinfectant: A substance which removes harmful organisms such as bacteria, viruses, or fungi from a place or an object by cleaning it. Proper use of disinfectants is essential for maintaining farm hygiene and preventing disease outbreaks. Farmers should select the appropriate disinfectant for their needs and use it according to label instructions. Understanding the benefits and applications of disinfectants will aid in effective disease management and improved farm productivity.

draft off: To remove certain animals from a herd or flock. Drafting off animals is a common practice in livestock management to separate animals for breeding, health reasons, or sale.

dray: A flat cart without sides. Drays are used for transporting heavy loads on farms, such as hay bales or equipment.

Dutch barn: A type of farmyard building used for storage of hay, loose or baled, corn crops, and agricultural implements. The older types of Dutch barn were built of iron with no enclosing side walls. Modern designs incorporate precast concrete, asbestos-cement sheeting with curved roofs. The sides may be partly or completely covered. Dutch barns provide essential storage for farm products and equipment, protecting them from the elements.

deficiency payment: Payment made to a producer when the price for a commodity at the market does not reach a preset guaranteed price. Deficiency payments can provide financial stability for farmers during periods of low market prices. Farmers should stay informed about eligibility requirements and application processes for deficiency payments to take advantage of this support. Understanding market trends and diversifying income sources can also help mitigate the impact of low prices.

degressivity: A proposed reduction in the amount of subsidies paid under the CAP. This proposal was rejected as a method of keeping the CAP budget under control. Understanding subsidy policies and their impacts on farm income is important for financial planning. Farmers should stay informed about changes in subsidy programs and explore alternative income sources to ensure economic stability. Adapting to policy changes and diversifying farm activities can mitigate the effects of reduced subsidies.

dove: A white domesticated pigeon. Doves are often kept for ornamental purposes and as pets. Proper care includes providing adequate shelter, nutrition, and protection from predators.

dieback: A fungal disease of some plants which kills shoots or branches. A gradual dying of trees starting at the ends of branches. Half the trees in the forest are showing signs of dieback. COMMENT: There are many theories explaining the environmental cause of dieback. Sulphur dioxide, nitrogen oxides, and ozone have all been suggested as causes, as well as acidification of the soil or acid rain on leaves. Managing dieback involves implementing proper disease control, monitoring, and care practices. Farmers and foresters should identify the cause of dieback and take corrective actions to maintain tree health. Understanding the environmental factors contributing to dieback will aid in developing effective management strategies.

dioecious: Referring to a plant species in which male and female flowers occur on different individuals. Monoecious. Understanding dioecious plant species is important for managing pollination and fruit production. Farmers should implement proper planting and pollination practices to ensure successful crop yields. Knowledge of plant reproductive systems will aid in effective cultivation and management practices.

dichlorodiphenyltrichloroethane: Full form of DDT, an insecticide that was formerly used especially against malaria-carrying mosquitoes. It is now banned in many countries because of its toxicity and ability to accumulate in the environment. Formula: C14H9Cl5. Farmers should be aware of the historical use and current ban on DDT to avoid environmental contamination and legal issues. Understanding alternative pest control methods will help manage pests effectively while complying with regulations and protecting the environment.

disinfection: The removal of harmful organisms such as bacteria, viruses, or fungi from a place or an object by cleaning it with a disinfectant. Proper disinfection practices are essential for maintaining farm hygiene and preventing disease outbreaks. Farmers should implement regular disinfection routines and use appropriate techniques for effective disinfection. Understanding the benefits and applications of disinfection will aid in maintaining a healthy and productive farm environment.

discus: The method used to identify the structure of a species. Understanding discus methods is important for identifying species and managing soil health. Farmers should work with soil scientists and agronomists to perform accurate soil analysis and make informed decisions about soil management. Understanding the benefits and applications of discus methods will aid in effective soil management and crop production.

drone: A male bee. Drones do not gather nectar or pollen but are essential for mating with the queen. Beekeepers should manage drone populations to maintain a healthy hive.

diversion: The practice of changing the direction of water flow for irrigation or drainage. Managing water diversion is important for optimizing water use and preventing soil erosion. Farmers should use appropriate techniques and equipment for effective diversion. Understanding the benefits and applications of diversion will aid in effective water management and crop production.

drought: A prolonged period of abnormally low rainfall. Farmers need to manage water resources effectively to mitigate the impacts of drought.

dicotyledon: A plant with seeds that have a cotyledon with two parts. Dicotyledons form the largest group of plants. Compare monocotyledon. Farmers should understand the characteristics and growth requirements of dicotyledons to manage crops effectively. Proper soil preparation, irrigation, and pest management are essential for successful cultivation of dicotyledons. Knowledge of plant types can aid in crop rotation and disease prevention.