Soil Fertility and Liming

Sample Review Questions

Molybdenum

This micronutrient is needed in F fixation by leguminous plants and is usually deficient in acid upland soil.

Nitrogen

This macroelement is a component of protein and chlorophyll and is most limiting element in crop production except for legumes.

Soil Fertility

What is the inherent capacity of the soil to supply nutrients to plants in adequate amount and suitable proportion is called?

Capacity factor

The ability of the soil to replenish the amount of nutrients in the soil solution.

Nutrient availability

The relative ease by which a nutrient is supplied by the soil

Soil analysis

A method of soil fertility evaluation whereby concentration of nutrients are known before a crop is planted

Leaching of bases

It is considered as one of the causes of soil acidity

Intensity factor

The concentration of nutrients in the soil solution

Magnesium

This macroelement is a metal component of chlorophyll and is deficient in acid upland soil

Youngest leaves

When nutrients are immobile, deficiency shows up first in

Diffusion

A process of movement of individual ion due to difference in concentration

Soil pH

A soil chemical property which largely controls nutrient availability and microbial activities

Toxicity

A term that indicates excessive level of nutrient in the plant or soil

Liming

The most appropriate soil management which increases availability of adsorbed P in acid upland soil 

Soil solution

The nutrient elements in organic matter and minerals are considered unavailable. The most available form of nutrients are in

Phosphorus

The macroelement which functions as a constituent of energy transfer metabolites

Vanadium

Which of the following is not essential to plants?

Zn, Co, and Mn

These elements are microelements and are required by plants in small amounts

C, O, and H

Essential elements derived from air and water

Mass flow

When nutrients dissolved in water are transported to the root surface, the mechanism is

Oldest leaves

When nutrients are mobile, deficiency symptoms will be observed first in

Phosphorus

Which of these elements is available to plants in anionic form?

Potassium

The micronutrient involved in the translocation of sugar in plant

Solubilization

The process that renders P available to plants

Increase water holding capacity of soil

A physical effect of lime

Basal application

A term for the initial application of fertilizer for crops

Ca(OH)₂

An example of a liming material

Lime requirement

It is the amount of lime to be applied to the soil in order to increase its soil pH

Farm manure

It is a mixture of animal excreta and soiled beddings that accumulates in stables or barns

Veitch method

A method determining lime requirement of soils that involves addition of increasing amounts of 0.04N Ca(OH)₂ solution to the soil samples

Broadcast

A method of fertilizer application whereby fertilizer materials are spread evenly on the soil surface

Soil erodibility

The soil’s inherent susceptibility to erosion which is influenced by infiltration capacity and structural stability

Potassium

Which of these elements is available to plants in cationic form?

Water

The most active agent of the soil erosion process in Philippines and other areas in the humid tropics

Phosphorus

Which of these elements is a phloem-mobile?

184g

The molecular weight of dolomite, CaMg(CO₃)₂ is

Ca(OH)₂

Which of these materials has a molecular weight of 74g?

Calcium

Which of these elements is a phloem-immobile?

CaO

Which of these liming materials is the most soluble?

Soil conservation

The wise use of land, especially with respect to soil erosion control

Leaching

The process by which soil nutrients are washed down by water from the root zone of the plants

Multiple cropping

Growing of several crop species on a piece of land in spatial arrangement

Strip cropping

Biological control of soil erosion

Terracing

Mechanical method of controlling soil erosion

Aridisol

Soils of the arid regions

Sheet erosion

Uniform removal of thin layer from a given area of land

Histosols

The soil order of organic soils

Logging

A practice that could contribute to soil erosion

Mulching

The practice of spreading plant residues (leaves, stalks, stovers, straws, and roots) on the ground to cover the surface of the soil during rainy days

Siltation of irrigation canal

An off-site ill of soil erosion

Dispersed and detached

Soil materials cannot be moved or transported by water unless they are

Loss of organic matter

On-site ills of soil erosion

Inceptisol

Soils exhibiting moderate development

C

The parent material corresponds to this horizon

Agric

A diagnostic horizon formed directly under the plow layer

Soil series

Soils in this category have the same color, texture, consistency, thickness, and reaction and have the same number and arrangement of horizons and similar chemical and mineralogical properties

Family

A category whose differentiating characteristics are properties important for plant growth

Order

The highest category in the soil taxonomy

Pedon

The smallest volume that can be called soil

Polypedon

Collection of pedons sufficiently alike to be classed in the same soil

Oxisol

Highly weathered soils with B horizon consisting primarily of sesquioxides

Vertisols

Order of montmorillonitic soils that form cracks during drying

B₃

A transitional layer between B and C or R

Series

To what category of soil classification Adtuyon clay belongs?

spodic

A diagnostic horizon with an accumulation of free iron oxides and organic matter