Agronomist dictionary

Storage and economics

Marketability of grain

A quality indicator representing the proportion of primary grain in a batch that meets trade standards and is suitable for commercial sale.

Breeding and seed production

Mass selection

A breeding method where a group of plants with desirable phenotypic traits is selected from a population to produce seeds for the next generation without indivi...

Digital farming

Material flow control

This is the process of monitoring and regulating the volume of agricultural material passing through a technological line per unit of time.

Breeding and seed production

Maternal form

A plant used as the female parent in hybridization to produce seeds with specific desired traits or hybrid vigor.

Weather and climate

Maximum hygroscopicity

The maximum amount of moisture a dry soil can absorb from the atmosphere under saturation conditions, expressed as a percentage of the soil's dry weight.

Storage and economics

Maximum permissible losses

An economically justified level of crop loss where the cost of control measures does not exceed the value of the saved yield.

Sowing and varieties

Maximum permissible seeding rate

This is the highest seed density per unit area that ensures optimal crop development without inducing excessive intraspecific competition for nutrients, water,...

Nutrition and fertilizers

Microbiological fertilizers

Agricultural products containing live beneficial microorganisms that enhance plant nutrient uptake and suppress soil-borne pathogens.

Nutrition and fertilizers

Microgranules

Microgranules are a formulation of fertilizers or pesticides in the form of small particles, 0.5 to 2 mm in diameter, designed for precise, localized applicatio...

Nutrition and fertilizers

Micronutrients

Micronutrients are essential chemical elements, such as boron, zinc, and iron, required by plants in small quantities for healthy growth and physiological devel...

Growth and development

Milk-wax ripeness

A stage of cereal crop development where grain contents transition from a liquid to a dough-like consistency, marking the onset of moisture reduction.

Nutrition and fertilizers

Mineral nitrogen

Mineral nitrogen refers to the inorganic forms of nitrogen, primarily ammonium and nitrate, that are readily available for plant uptake from the soil.

Nutrition and fertilizers

Mineralization

The process by which soil microorganisms decompose organic matter into simple mineral forms that can be absorbed by plants.

Soil and tillage

Minimum tillage

A conservation tillage system that reduces the frequency and depth of mechanical soil disturbance to improve soil structure and moisture retention.

Weather and climate

Moisture coefficient

An indicator representing the ratio of annual precipitation to potential evapotranspiration, used to determine moisture availability for crop production.

Storage and economics

Moisture conversion factor

This is a mathematical factor used to adjust the weight of agricultural commodities to a standard moisture level for accurate storage and trade calculations.

Breeding and seed production

Morphological traits

These are the external physical characteristics of a plant, such as shape, size, color, and structure, used for variety identification and field assessment.

Soil and tillage

Mulching

Mulching is the agricultural practice of covering the soil surface with organic or inorganic materials to improve soil health and plant growth.

Machinery and irrigation

Multicontroller

A centralized electronic control unit that integrates the operation of various agricultural machinery components into a single interface.

Breeding and seed production

National List of Varieties

An official catalogue of plant varieties approved by the government for commercial cultivation and sale within a country.

Storage and economics

Natural mass

The actual weight of agricultural products as measured at the point of receipt or sale, regardless of moisture content or purity levels.

Digital farming

NDVI (Normalized Difference Vegetation Index)

A remote sensing indicator used to quantify crop health and density by measuring the difference between near-infrared and red light reflectance.

Storage and economics

Negative allowance

A method of reducing the seed sowing rate based on superior seed quality, such as high laboratory germination and Thousand Kernel Weight (TKW).

Nutrition and fertilizers

Nitrification

The biological process of oxidizing ammonia nitrogen by soil bacteria into nitrate, which is the form most easily absorbed by plants.

Nutrition and fertilizers

Nitrogen fixation

The process by which atmospheric nitrogen is converted into ammonia or related nitrogenous compounds that plants can use.

Nutrition and fertilizers

Nitrogen immobilization

The process by which soil microorganisms absorb mineral nitrogen, temporarily making it unavailable for uptake by crop plants.

Digital farming

Nitrogen sensor

An agricultural device that measures nitrogen levels in soil or crop canopy to assist in precision nutrient management.

Nutrition and fertilizers

Nitrogen top dressing

Nitrogen top dressing is the application of nitrogen fertilizers during the growing season to promote healthy vegetative growth and increase crop yields.

Nutrition and fertilizers

Nitrogen-fixing bacteria

Microorganisms capable of transforming atmospheric nitrogen into a form that plants can easily absorb and use for growth.

Weather and climate

Normalized Difference Vegetation Index (NDVI)

The Normalized Difference Vegetation Index is a simple graphical indicator used to assess whether the target area contains live green vegetation or not based on...

Machinery and irrigation

Nozzle

A replaceable component of a sprayer designed to atomize liquid into droplets of a specific size and create a spray pattern for uniform pesticide or fertilizer...

Machinery and irrigation

Nozzle

A mechanical device used in sprayers to atomize liquid into droplets and distribute it evenly over a target area.

Machinery and irrigation

Nozzle

A nozzle is a precision-engineered tip attached to a sprayer that regulates the flow of liquid and breaks it into droplets of a specific size and pattern.

Machinery and irrigation

Nozzle working pressure

The pressure at which the liquid is forced through the nozzle, determining droplet size, spray pattern, and flow rate.

Nutrition and fertilizers

NPK (Nitrogen-Phosphorus-Potassium)

Nitrogen-Phosphorus-Potassium — the main elements of mineral nutrition.

Nutrition and fertilizers

NPK complex

This is a balanced combination of the three primary macronutrients — nitrogen, phosphorus, and potassium — essential for optimal plant growth and crop yield.

Nutrition and fertilizers

Nutrient balance

This is the net difference between the amount of nutrients applied to the soil through fertilizers and the amount removed from the field by crop harvest.

Nutrition and fertilizers

Nutrient deficiency

A condition in which a plant does not receive sufficient essential nutrients from the soil or fertilizers to support its healthy growth and development.

Nutrition and fertilizers

Nutrient uptake

This is the amount of mineral nutrients that crops absorb from the soil and fertilizers to produce their total biomass and yield.

Nutrition and fertilizers

Nutrient Use Efficiency

This is a measure of the proportion of nutrients actually taken up by the plant from applied fertilizers relative to the total amount applied.

Digital farming

Optical soil composition sensor

This is a device that utilizes spectral analysis to determine the chemical and physical characteristics of soil in real time directly in the field.

Nutrition and fertilizers

Organic fertilizers

These are naturally occurring materials that provide essential nutrients to plants while improving soil structure and promoting beneficial microbial activity.

Growth and development

Organogenesis

Organogenesis is the biological process by which plant organs are sequentially formed from meristematic tissues throughout the plant's life cycle.

Growth and development

Osmotic pressure

It is the physical force generated by solutes within plant cells that draws water through membranes, maintaining turgor and supporting cellular function.

Nutrition and fertilizers

Osmotic stress

A condition where plants cannot absorb sufficient water due to high salt concentrations in the soil or drought, leading to wilting and stunted growth.

Digital farming

Parallel guidance

A navigation technology for agricultural machinery that ensures equipment travels along parallel paths with high precision, eliminating overlaps and skips.

Machinery and irrigation

Parallel guidance system

A satellite-based navigation technology that assists machinery operators in driving agricultural equipment along precise paths to avoid overlaps and skips.

Crop protection

Pest monitoring

A systematic process of observing crops to detect, identify, and quantify pests, diseases, and weeds for informed plant protection decision-making.

Crop protection

Pest resistance

This is the acquired ability of a pest population to survive exposure to pesticides that were previously effective against them.

Crop protection

Pesticide load

It is a measure of the total amount and frequency of pesticide active ingredients applied to a specific area over a given timeframe.

Nutrition and fertilizers

Phosphorus fixation

The process by which soil minerals convert available phosphorus from fertilizers into insoluble forms that are inaccessible to plant roots.

Sowing and varieties

Photoperiod sensitivity

This is a biological response of plants to the length of day or night, which regulates the timing of flowering and vegetative development.

Growth and development

Photoperiodism

Photoperiodism is the physiological reaction of organisms to the length of day or night, which controls key developmental processes like flowering and maturatio...

Growth and development

Photosynthesis

Photosynthesis is the biological process by which plants convert light energy into chemical energy, creating organic compounds essential for crop growth and yie...

Weather and climate

Photosynthetically Active Radiation (PAR)

The spectral range of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis.

Growth and development

Phototropism

Phototropism is the growth response of plants toward or away from an external directional light source.

Soil and tillage

Physical clay

It represents the total sum of all soil particles smaller than 0.01 millimeters, which determine the soil's mechanical composition and its ability to retain wat...

Storage and economics

Physical grain mass

This is the actual total weight of a grain batch at its natural moisture content, determined by weighing without adjusting for impurities or standard moisture l...

Storage and economics

Physical mass of a grain lot

It is the actual weight of a grain lot measured in kilograms or tonnes, determined by direct weighing without adjustments for moisture content or impurities.

Sowing and varieties

Physical purity of seeds

It is the percentage by weight of pure seeds of the crop variety in a seed lot, free from foreign matter, weed seeds, and damaged kernels.