Agronomist dictionary

Weather and climate

Active growing period

The phase during which air temperatures consistently remain above the threshold required for the rapid growth and physiological development of crops.

Crop protection

Active ingredient

This is the primary chemical or biological component of a pesticide or fertilizer that directly affects the targeted pest, disease, or plant growth.

Soil and tillage

Active soil reaction

Active soil reaction is the measure of the acidity or alkalinity of the soil solution, determined by the concentration of hydrogen ions.

Weather and climate

Active temperatures

The sum of daily average air temperatures above the biological minimum required for the growth and development of a specific crop.

Storage and economics

Active ventilation

The forced circulation of air through a bulk of agricultural crops to control temperature and moisture levels for safe storage.

Growth and development

Adaptive potential

The inherent ability of a crop variety to maintain productivity and growth despite fluctuating environmental conditions and biotic or abiotic stresses.

Crop protection

Adjuvant

A substance added to a pesticide or fertilizer formulation to improve its performance, adhesion to plant surfaces, and absorption efficiency.

Crop protection

Adjuvant

A substance added to a pesticide spray mixture to improve the performance, physical properties, or biological activity of the active ingredient.

Soil and tillage

Aeration porosity

The fraction of soil volume that is filled with air instead of water, facilitating oxygen diffusion to plant roots and soil organisms.

Soil and tillage

Aggregate composition

Aggregate composition is the quantitative distribution of soil clumps (aggregates) of various sizes within the arable layer of the soil.

Digital farming

Agricultural machinery telemetry

This is a technology for remote monitoring and real-time data collection from agricultural machinery to track their performance, location, and technical conditi...

Machinery and irrigation

Agro-navigator

A GPS-based guidance system for agricultural machinery designed to ensure precise field operations with minimal overlap and skipped areas.

Nutrition and fertilizers

Agrochemical soil analysis

A comprehensive laboratory examination of soil samples to determine the concentration of nutrients, pH levels, and other vital fertility indicators.

Weather and climate

Agroclimatic resource

This refers to the set of natural conditions of an area, such as heat, light, and moisture, that determine the potential and efficiency of cultivating agricultu...

Weather and climate

Agroclimatic zoning

This is the classification of regions into zones with similar climatic conditions to optimize the selection and management of agricultural crops.

Weather and climate

Agrometeorological forecast

This is a scientific prediction of weather conditions that directly impact crop growth, soil moisture levels, and the timing of essential farming operations.

Weather and climate

Agrometeorological monitoring

A system of regular observations of weather conditions and their impact on crops to facilitate informed agricultural decision-making.

Soil and tillage

Agrophysical properties of soil

These are the physical characteristics of soil that determine its capacity to store water, provide aeration, and support root development for optimal plant grow...

Digital farming

Agroscouting

Agroscouting is the systematic inspection of crops to promptly identify pests, diseases, weeds, and assess the growth status of cultivated plants.

Crop protection

Agrotechnical control method

It is a set of agricultural practices designed to create an environment that suppresses the development of pests, diseases, and weeds.

Machinery and irrigation

Air-induction nozzle

A spray nozzle type that utilizes the Venturi effect to draw air into the nozzle, creating larger, air-filled droplets that are highly resistant to wind drift.

Nutrition and fertilizers

Ammonification

The biological process by which microorganisms decompose organic nitrogen compounds into ammonia, making nitrogen available for plant uptake.

Nutrition and fertilizers

Ammonium nitrate

Ammonium nitrate is a highly effective nitrogen mineral fertilizer in granular form containing nitrogen in both ammonium and nitrate forms.

Growth and development

Apical dominance

It is a biological phenomenon where the main central stem of a plant grows more strongly than other side stems due to the inhibitory effect of auxins.

Crop protection

Application rate

The specific amount of a pesticide or fertilizer applied per unit area or volume to achieve the desired agricultural effect.

Machinery and irrigation

Application rate per hectare

The volume of spray solution applied to one hectare of land during crop protection or fertilization operations.

Breeding and seed production

Approbation bush

A representative plant or group of plants selected in a field to perform an expert assessment of the varietal and seed quality of a crop.

Breeding and seed production

Approbation percentage

A metric indicating the degree of varietal purity of a crop field, determined during official field inspection to ensure adherence to seed quality standards.

Weather and climate

Atmospheric drought

A period characterized by high temperatures and low air humidity, leading to excessive transpiration in plants and potential wilting despite available soil mois...

Digital farming

Automatic headland turning system

A precision farming technology that enables agricultural machinery to automatically execute turns at the field's edge based on predefined patterns.

Digital farming

Autosteer

A guidance system that automatically steers agricultural machinery to follow a precise path, significantly reducing overlap and operator fatigue.

Nutrition and fertilizers

Available forms of nutrients

These are the portions of soil nutrients that are readily soluble in the soil solution and can be easily absorbed by plant roots during the growing season.

Weather and climate

Available water

The portion of soil moisture that can be readily absorbed by plant roots, held between field capacity and the permanent wilting point.

Weather and climate

Available water capacity

This is the amount of water in the soil that can be absorbed by plant roots, calculated as the difference between the soil moisture at field capacity and the pe...

Storage and economics

Baking quality indicator

A set of grain properties that determine its suitability for producing bread with specific volume, texture, and structural characteristics.

Nutrition and fertilizers

Basal application

This is the application of fertilizers to the soil before sowing or planting to build up a nutrient reserve for the entire growing season.

Storage and economics

Base moisture content

This is a standardized moisture level in grain or seeds, set by industry regulations, to ensure safe long-term storage and fair commercial transactions.

Nutrition and fertilizers

Bioavailability

Bioavailability is the proportion of a nutrient or chemical that is absorbed by a plant and is available for physiological utilization.

Soil and tillage

Biological activity of soil

It is the overall intensity of life processes carried out by soil microorganisms and fauna that transform organic matter into nutrients available for plants.

Crop protection

Biological efficacy

A measure of the performance of plant protection products, indicating the degree of suppression of pests or diseases compared to an untreated control group.

Weather and climate

Biological minimum temperature

This is the lowest air or soil temperature at which plants begin their metabolic processes, growth, and development.

Crop protection

Biological pest control

This is a method of controlling agricultural pests and diseases using living organisms or their metabolic products.

Weather and climate

Biological productivity of climate

A quantitative indicator representing the potential capacity of regional climate conditions to support the formation of agricultural crop biomass.

Growth and development

Biological yield

This is the total dry matter accumulation of a crop, including both grain and vegetative parts, produced in a field before harvest.

Sowing and varieties

Biological yield

It is the total weight of the biomass produced by plants in a field, calculated before harvest based on plant density and grain weight.

Growth and development

Biomass

Biomass in agronomy is the total mass of living organisms or their products accumulated per unit area of crops or within the soil layer.

Machinery and irrigation

Boom height

The vertical distance measured from the spray nozzles to the target surface, such as the soil or the crop canopy.

Growth and development

Branching pattern

The specific mode of lateral shoot development on the main stem that determines the architectural structure and vegetative density of a plant.

Breeding and seed production

Breeding nursery

A specialized field area for the primary propagation and evaluation of hybrid plant materials selected to develop new crop varieties.

Breeding and seed production

Breeding process

The breeding process is a targeted activity aimed at creating and improving plant varieties and hybrids with specific commercially valuable traits.

Storage and economics

Bulk density

The mass of a unit volume of dry soil or granular material, including the air-filled pore space between particles.

Soil and tillage

Bulk density of soil

The mass of dry soil per unit volume of soil, including the air-filled pore space, in its natural structural state.

Nutrition and fertilizers

Cation Exchange

A chemical process where soil particles hold and release positively charged nutrient ions, making them available for plant uptake.

Soil and tillage

Cation exchange capacity

The ability of soil to hold and release positively charged nutrients, preventing them from leaching out of the root zone.

Machinery and irrigation

Center pivot irrigation system

An automated irrigation equipment that rotates around a central pivot point to supply water to crops across a circular field.

Nutrition and fertilizers

Chelation

A chemical process where metal ions are bound to organic molecules, making them more stable and easily absorbable by plants.

Crop protection

Chemical plant protection method

A crop protection strategy involving the application of chemical pesticides to control pests, diseases, and weeds.

Soil and tillage

Chiseling

This is a method of non-inversion tillage that uses heavy-duty shanks to loosen the soil and break up deep compaction without flipping the topsoil layer.

Digital farming

Chlorophyll index

A metric representing the chlorophyll content in plant leaves, used for real-time monitoring of crop health and nitrogen status.

Nutrition and fertilizers

Chlorosis

A condition in plants where leaves turn yellow due to a lack of chlorophyll, impairing their ability to photosynthesize effectively.