Exam 2 Review

This soil horizon consists of unconsolidated parent material

What is the guaranteed analysis of anhydrous ammonia?

What is the guarenteed analysis of Urea?

Monoculture cropping systems are more adaptable

Insects that attack the parts of plants that aren't the economic part cause what type of damage?

Some plants produce chemicals that are harmful to other plants in defense this is called:

Weeds controlled by herbicides is what kind of control ?

High bulk density makes a root growth and tillage easier?

A soil structure that resembles cookie crumbs and are commonly found in surface horizons is:

Old growth means the nutrient is ____ in the plant.

What are the mineral nutrients or secondary nutrients?

What percent of Earth's surface is arable land?

Soil structure that is in thin, flat plates of soil that lies horizontally is termed:

A vertical cross section of soil that reveals its vertical distribution is termed:

Mobile within the plant; plants are stunted; leaves darker green than normal; lower leaves often purplish between veins

When a pesticide is absorbed and translocated within the plant, what is the action called?

This occurs when leaves appear dark green or have a tint of purple:

A plant growing where it is not wanted is considered:

A system in which one crop is planted in the open areas of another

What are the 3 Non-Mineral nutrients?

Viruses can survive after the host has died.

Soil particles from 2mm to 0.05 in diameter and are gritty particles of what texture?

Effective pest controls with more risk is often chosen first.

_______ is the loss of the ability to properly function as a result of prolonged irritation by a pathogen

Soil that contains a proportionate mixture of sand, silt and clay particles are termed?

the arrangement of soil particles into groups is known as

This nutrient is immobile ; larger veins remain green while the rest of the leaf becomes chlorotic

Soil particles that are <0.002 mm in diameter, invisible to the naked eye and slippery when wet are of what texture?

A herbicide applied prior to planting, sometimes called a seed dressing:

if a fertilizer has an analysis of 24-6-12, what percent of phosphorous does it contain?

A pesticide used for insects is called:

The maximum amount of water a soil can hold against the force of gravity; fully saturated is termed:

How many elements are deemed essential in plant production?

Long-term application of ammonium nitrate fertilizers may make soils more alkaline.

What is the guaranteed analysis diammonium Phosphate ?

The point at which soil water is limiting, unavailable, and can not meet the needs of the plants?

The breakdown of chlorophyll resulting in yellowing of plant tissue is called:

The physical condition of the soil as it relates to tillage, planting, germination, and emergence is called

Planting a crop after harvest of one cash crop and before planting another

____ nutrients are readily mobile within the plant system and translocated from older tissues to younger ones.

Soil particles 0.05-0.002 in diameter, smooth the to touch, barely visible are particles of what texture?

A pesticide used for fungi is called:

Immobile; dead spots scattered over the leaf surface

This soil horizon is a less weathered horizon where minerals such as clay accumulate

What are the 3 macro nutrients needed by all crops?

This nutrient is mobile within the plant; Leaves are yellow from the tip toward the mid rib.

Leguminous plants that are planted and plowed under the soil while still green are termed:

mobile; leaves are pale green with dead spots; veins lighter in color than the rest of the area

Water that is held in the soil pore spaces against the force of gravity; available for plant use

Immobile; upper/newer leaves have purple margins inward purple blotching, bleached bands on either side of midrib

When the concentration of an element is too high, causing reduced crop yields, the plant nutrient status is considered?

Monoculture cropping systems are relatively easy to manage

Fungi cause most of the important infection diseases of crop plants:

A method of application that is directed at the leaf so that it penetrates the plant through the stomata is called:

Microscopic parasites that inhabit the soil are called:

Total pore space is usually lower and water content higher at greater depths

______ nutrients do not move readily within the plant so they are tied up in older plant tissues.

A pesticide attacks the respiratory system of the target organism is called:

Soil pH affects which crops can be grown.

Competition between plants of the same species is referred to as

This nutrient is mobile within the plant; interveinal chlorosis in the older leaves ; leaf margins curling

Broadcast spraying of non-specific pesticides are usually a last resort.

A herbicide that kills only certain species is considered:

The maximum production capacity of a crop is termed:

When the nutrient concentration is adequate to support plant growth, the plant nutrient status is considered?

Residues of plants, animals and microorganisms broken down over time contributes to:

Polyculture cropping systems have increased diversity

T/F: Since small requirements of micronutrients are needed, they are less important then mineral and macro nutrients

Water that is held tightly and forms a film around soil particles; relatively unavailable for plant use

Some pesticides are 100% effective.

What is the most limiting nutrient in crop production?

Water that moves downward through the soil profile due to the force of gravity; not available for plant use

The mechanical soil stirring action conducted for improved plant growth is termed?

The injection of fertilizers, soil amendments and other water-soluble products and an irrigation system

To be considered conservation tillage, what percent residue has to be left on the soil surface?

Polyculture cropping systems are more complicated to manage

This soil horizon is the mineral horizon enriched with organic matter.

immobile; petioles and stems become brittle; bases of young leaves break down

immobile; terminal bud is often dead; young leaves appearing hooked at the tip, tips and margins of leaves withered

When insect pests damage the economic product for which the crop is grown is called

which soil structure is highly associated with organic matter?

Weeds controlled by selective grazing is called

A herbicide applied after the crop has been established is classified as:

Crop production practices are manipulated to enhance stability and production

A pH of 8.2 is considered acidic.

A layer of soil parallel to the surface differing in characteristics from the soil above and below is termed:

The portion of a volume of soil that is not occupied by soil particles is known as?

Tissue death is otherwise known as ____. It may occur as patches or spots on leaves, or on the margins or leaf tips

Land in which trees are combined with agricultural crops and/or animal is termed

The practice of growing a different crop in the same field each year