Agronomist dictionary

Weather and climate

Climatic normal

The arithmetic average of a climate element computed over a long period, typically used as a baseline to compare current weather patterns.

Weather and climate

Climatic potential

It refers to the combination of natural climatic resources in a region that determines the maximum possible agricultural productivity under optimal management p...

Soil and tillage

Cloddiness

Cloddiness is a soil condition characterized by the presence of large clods exceeding 10 centimeters in diameter, which hinder seed germination and field unifor...

Breeding and seed production

Clonal selection

A breeding method involving the selection of the best individual plants within a vegetatively propagated cultivar to preserve or improve its specific traits.

Breeding and seed production

CMS (Cytoplasmic Male Sterility)

A genetic condition in plants that prevents the production of functional pollen, used primarily to facilitate large-scale hybrid seed production.

Growth and development

Coenosis

Coenosis is a grouping of living organisms inhabiting a specific environment and interacting with each other and their surroundings.

Storage and economics

Combine harvester throughput

The maximum amount of crop material that a combine's threshing and separating system can process per unit of time while maintaining harvest quality and minimal...

Storage and economics

Conditioned grain

This is grain that meets established quality standards and regulatory moisture requirements, making it safe for long-term storage or processing without risk of...

Sowing and varieties

Conditioned seeds

These are seeds that meet all established quality and safety standards regarding purity, germination rate, and moisture content for agricultural use.

Crop protection

Contact action

A mode of pesticide action that affects a pest or pathogen upon direct physical contact with the plant surface or the organism itself.

Weather and climate

Continentality of climate

This is a measure of the difference between the temperatures of the warmest and coldest months of the year, indicating the severity of a region's climate.

Storage and economics

Continuous drying

A grain drying method where the product moves through the dryer in a steady, uninterrupted flow without pauses for heating or cooling cycles.

Breeding and seed production

Contrast hybridization

A plant breeding method that involves crossing genetically distant parental forms to create progeny with unique, often opposing, valuable traits.

Digital farming

Controlled Traffic Farming (CTF)

A crop management system that limits all heavy machinery to fixed traffic lanes to reduce soil compaction and optimize field operations.

Nutrition and fertilizers

Conversion factor for active ingredient

A multiplier used to determine the actual amount of a chemical component within a formulated fertilizer or pesticide product based on its concentration percenta...

Nutrition and fertilizers

Corrective fertilization

The application of fertilizers specifically intended to address an identified nutrient deficiency in crops during their active growth phase.

Storage and economics

Cost per hectare

This is the total sum of all direct and indirect expenses incurred by an agricultural producer to cultivate a crop on one hectare of land.

Machinery and irrigation

Coulter

A ground-engaging component of a seed drill or planter designed to open a furrow in the soil for seed placement and subsequent covering.

Soil and tillage

Cover crops

These are plants grown primarily to protect and enrich the soil rather than for harvest, serving to prevent erosion, suppress weeds, and improve soil health bet...

Storage and economics

Critical moisture content

This is the maximum level of moisture at which grain can be stored safely without the risk of heating, spoilage, or microbial growth.

Weather and climate

Critical period of water consumption

This is a developmental stage of a plant during which water deficiency causes the most significant irreversible damage to crop yield and quality.

Sowing and varieties

Critical seeding depth

The maximum depth at which a seed can be planted while still having enough stored energy for the sprout to reach the soil surface.

Machinery and irrigation

Crop clearance

The vertical distance between the lowest point of an agricultural machine's frame and the ground, determining its ability to move over crops without causing dam...

Sowing and varieties

Crop competitiveness

It is the ability of crop plants to suppress weed growth and utilize environmental resources more efficiently, ensuring high yields despite the presence of comp...

Crop protection

Crop growth stage

A specific period in the life cycle of a crop, characterized by distinct morphological and physiological changes during its development from germination to matu...

Growth and development

Crop Indexing

A method of quantifying crop condition using remote sensing based on the analysis of spectral properties of reflected light.

Digital farming

Crop monitoring

The systematic observation of agricultural crops to identify threats early and evaluate the effectiveness of agronomic management practices.

Sowing and varieties

Crop rotation

The practice of growing a series of different types of crops in the same area across a sequence of growing seasons.

Sowing and varieties

Crop uniformity

This refers to the consistency of plant development stages, height, and density across an entire field.

Breeding and seed production

Cross-pollination

The transfer of pollen from the male parts of one flower to the female parts of another flower of the same species.

Machinery and irrigation

Cultipacker

An agricultural implement used to firm the soil surface, break up clods, and ensure better seed-to-soil contact for improved germination.

Breeding and seed production

Cultivar acclimatization

The process of adapting a crop cultivar to new soil and climatic conditions that differ from the environment of its original breeding.

Growth and development

Cultivation

A shallow mechanical soil treatment practice used to loosen the soil, manage weeds, and prepare the seedbed without inverting the soil layers.

Breeding and seed production

Cultural value of seeds

This is a quality indicator representing the percentage of pure, viable seeds in a batch capable of producing healthy seedlings.

Soil and tillage

Deep loosening

An agricultural practice of loosening the soil at a significant depth without inverting the furrow slice to break up compacted layers and improve soil structure...

Nutrition and fertilizers

Denitrification

A microbial process in the soil that reduces nitrates or nitrites into gaseous nitrogen, resulting in a loss of available plant nutrients.

Breeding and seed production

Depression (in agronomy)

A temporary slowing or cessation of plant growth and development caused by adverse environmental factors or external physiological stress.

Crop protection

Desiccation

Pre-harvest dehydration of plant tissues using chemicals to accelerate maturation and simplify the harvesting process.

Growth and development

Determinacy

A biological trait of plants to cease the growth of the main stem after developing a specific number of inflorescences.

Sowing and varieties

Determinate growth habit

A growth pattern in plants where the main stem ends in a floral cluster, causing the plant to stop vegetative growth once it reaches a certain size.

Growth and development

Differentiation of the growing point

A biological process where undifferentiated cells at the plant's shoot apical meristem develop into specific organs like leaves, stems, or reproductive spikelet...

Digital farming

Digital field map

A digital field map is a precise geospatial representation of farmland that integrates data on boundaries, soil properties, topography, and historical crop yiel...

Storage and economics

Direct harvesting

A harvesting method where cutting and threshing of crops are performed in a single pass of the combine harvester across the field.

Soil and tillage

Discing

A soil tillage practice using disc implements to break up clods, incorporate crop residues, and control weeds by cutting the soil surface.

Crop protection

Disease symptomatology

This refers to the set of external and internal signs used to identify the nature and severity of a pathogen's effect on a crop.

Crop protection

Distribution range

Distribution range is the geographical area within which a specific plant species, pest, or disease is naturally found or successfully cultivated under existing...

Growth and development

Dormancy

Dormancy is a physiological state of arrested growth in seeds, buds, or tubers, where they fail to germinate even under favorable environmental conditions.

Growth and development

Dormancy

A biological state in which plant growth and metabolic activity are suspended or slowed down to survive adverse environmental conditions.

Soil and tillage

Drainage

Drainage is the natural or artificial process of removing excess water from the soil to prevent saturation and waterlogging.

Machinery and irrigation

Drip tape

A thin-walled flexible tube with embedded emitters designed to deliver water and nutrients directly to the root zone of plants.

Weather and climate

Drought

A prolonged period of abnormally low precipitation leading to a water deficit in the soil and significant stress or crop failure in agricultural systems.

Weather and climate

Drought tolerance

This is the ability of agricultural crops to maintain growth and yield under conditions of soil moisture deficit and low air humidity.

Sowing and varieties

Early vigor

The ability of seedlings to rapidly establish vegetative biomass and develop a robust root system during the initial stages of growth.

Breeding and seed production

Ecological plasticity

This is the ability of a crop variety or hybrid to maintain stable productivity despite variations in environmental conditions and climatic factors.

Sowing and varieties

Ecological plasticity of a hybrid

The ability of a hybrid crop to maintain stable productivity when growing conditions fluctuate or across different climatic zones.

Breeding and seed production

Economic and biological assessment

A comprehensive analysis of agricultural crop varieties based on their productive potential and resistance to environmental stress factors.

Crop protection

Economic Injury Level

This is the lowest population density of a pest that will cause economic damage, justifying the cost of control measures.

Crop protection

Economic threshold

The pest population density at which control measures should be initiated to prevent an increasing pest population from reaching the economic injury level.

Storage and economics

Economic threshold of harvest losses

It is the critical level of crop loss at which the value of the harvested grain equals the cost of implementing measures to prevent further loss.

Weather and climate

Effective temperatures

This is the accumulation of air temperatures above a specific biological base threshold required for a crop to complete a developmental stage.