D

dystrophic: Referring to a pond or lake that contains very acidic brown water, lacks oxygen, and is unable to support much plant or animal life because of excessive humus content. Managing dystrophic conditions involves monitoring water quality and implementing measures to improve oxygen levels and reduce acidity.

digger: A type of plough body with a short, sharply curved moldboard. Diggers are used for deep ploughing, especially to prepare for root crops or for land reclamation. Using diggers can improve soil preparation and root penetration for crops. Farmers should select the appropriate type of digger for their needs and use it properly to achieve optimal soil conditions. Understanding the benefits and applications of diggers will aid in effective soil management and crop establishment.

denaturing: The process of staining wheat grain with a dye to make it unusable for human consumption. Denatured grain may be used as animal feed. Farmers should implement proper techniques for denaturing grain to ensure it is not used for human consumption. Understanding the benefits and applications of denatured grain can help farmers manage surplus or low-quality produce effectively.

drainage: The removal of water by laying drains in or under fields. Effective drainage improves soil structure, prevents erosion, and supports healthy plant growth.

dominance: A state where one species in a community is more abundant than others or the priority for food and reproductive mates that one animal has over another in a group. In genetics, dominance refers to the characteristic of a gene form (allele) that leads to the trait it controls being shown in any individual carrying it. Understanding dominance helps farmers manage breeding programs and animal behavior.

Devon: A breed of fine-boned dual-purpose cattle. North and South Devons are dark red, and belong to a type of red cattle bred for centuries in England. They thrive on pasture which would not be sufficient for larger breeds, and provide both meat and milk. (NOTE: They are commonly known as Red Rubies.) Farmers raising Devon cattle should focus on proper grazing management, health monitoring, and breeding practices to maintain herd productivity. Marketing the unique characteristics of Devon cattle, such as their hardiness and dual-purpose nature, can attract buyers and enhance farm profitability.

dry matter intake: The amount of feed that an animal consumes or requires, discounting its water content. Abbr DMI. Understanding dry matter intake helps farmers ensure their animals receive the necessary nutrients for growth and production.

drift: To float in the air onto areas that are not to be sprayed. Drift can lead to unintended exposure of crops or areas to pesticides or fertilizers, which can be harmful. Farmers should use techniques to minimize drift, such as proper nozzle selection and application methods.

derris: A powdered insecticide extracted from the root of a tropical plant, used against fleas, lice, and aphids. Rotenone. Farmers should use derris carefully, following label instructions and safety guidelines, to manage pests effectively. Understanding the impact of derris on crops, livestock, and the environment will help in selecting the right product and application method. Monitoring pest populations and integrating other control methods can enhance pest management.

disinfectant footbath: A disinfectant solution through which animals, e.g., cattle, have to walk to clean their feet and to remove diseases such as foot rot. Using disinfectant footbaths is important for maintaining hoof health and preventing disease in livestock. Farmers should ensure proper construction, maintenance, and use of footbaths for effective disinfection. Understanding the benefits and applications of disinfectant footbaths will aid in maintaining a healthy and productive herd.

dissolution: The process of dissolving or breaking down. Proper management of dissolution processes is important for maintaining soil health and preventing pollution. Farmers should implement practices like crop rotation, organic amendments, and proper waste management to enhance dissolution and nutrient cycling. Understanding the factors contributing to dissolution will aid in developing effective management strategies.

dandelion: A yellow weed (Taraxacum officinale) found in grassland and also sometimes eaten as salad. While often considered a weed, dandelions have culinary and medicinal uses. Farmers can harvest dandelions for sale in niche markets or for personal use. Additionally, understanding weed management practices can help maintain pasture and crop health, ensuring optimal growth conditions for desired plants.

distribution: The spreading of something over an area. Proper distribution of seeds, fertilizer, or pesticides is important for achieving uniform application and optimal results. Farmers should use appropriate equipment and techniques for effective distribution. Understanding the benefits and applications of distribution will aid in effective crop and soil management.

downy mildew: A disease (Peronospora brassica) that causes white bloom on the undersurface of leaves, most damaging to Brassica seedlings. Managing downy mildew involves using resistant plant varieties, practicing crop rotation, and applying appropriate fungicides.

Down breeds: Breeds of short-wooled sheep, giving wool of a creamy colour; the sheep have dark faces and legs and are hornless. They are found in hilly areas and include the Southdown, Hampshire Down, Dorset Down, and Suffolk. Down breeds are prized for their meat and wool production.

denude: To make land or rock bare by cutting down trees and other plants or by erosion. The timber companies have denuded the mountains. Farmers should implement sustainable land management practices to prevent denudation and maintain soil health. Practices like reforestation, agroforestry, and erosion control can help mitigate the effects of denudation. Understanding the environmental and economic impacts of denudation will aid in developing sustainable farming systems.

dump: A place where waste, especially solid waste, is thrown away. Proper waste management practices are essential on farms to prevent environmental contamination and promote sustainability.

deficient: Lacking something essential. For example, the soil is deficient in important nutrients. Scrub plants are well adapted to this moisture-deficient habitat. She has a calcium-deficient diet. Farmers should regularly test soil and animal diets to identify and address deficiencies. Implementing soil amendments, balanced fertilization, and proper nutrition practices can improve crop and livestock health. Working with agricultural extension services can provide guidance on managing deficiencies effectively.

darnel: A common weed (Lolium temulentum) which affects cereals and is poisonous to animals. Effective weed management is crucial for farmers to prevent darnel from infesting cereal crops. Regular monitoring, crop rotation, and the use of herbicides can help control darnel and protect crop yields. Understanding the risks and implementing preventive measures will ensure healthier and more productive fields.

draining pen: A pen for sheep to go in after dipping, where surplus liquid can drain off the wet fleece and go back into the sheep dip. Draining pens help manage the health and hygiene of sheep.

decomposition: The process of breaking down into simple chemical compounds. Decomposition is essential for nutrient cycling and soil health. Farmers should manage decomposition processes through composting and mulching to enhance soil fertility. Understanding the factors that influence decomposition, such as temperature, moisture, and organic matter quality, can help optimize these processes for better crop productivity.