MODULE 2 Flashcards
_____the progressive development of an organism. There are several ways in which the development of a plant can be expressed (dry weight, length of vines, height, or diameter of ears)
Growth
The overall growth can occur in one or all of three types of change. What are theses ?
Structural parts may increase in number, or they may increase in size, or the spaces between the parts may enlarge.
What are the factors affecting plant?
*Growth Genetic factor
*Environmental
*Atmospheric factors
*Biotic factors
The importance of_____ is illustrated by the large increase in yieid resuiting from the introduction of new varietes that are
high yielding, and pest resistance as weil as the introduction of biotechnology resulting to the generation of genetcally modified organism (GMO).
genetics in the growth of agricultural crops
The genetic constitution of a given plant species limit the extent to which that plant may develop.
Growth Genetic factor
No environmental condition, no matter how favorable, can further extend those limits. In the case of biotechnology, genes are transferred so as to derive the maximum potential of the plant under specific environmental conditions.
Growth Genetic factor
The high crop yields produced with modern varieties, lines and so on will require more plant nutrients than was necessary for the lower yields of the past.
Growth Genetic factor
___is defined as the aggregate of all the external conditions and influences the life and development of an organism.
Environment
What are environmental factors known to influence plant growth?
*Temperature
*Moisture supply
*Radiant energy
*Composition of the atmosphere
*Soil structure and composition of soil air
*Soil reaction
*Biotic factors
*Supply of mineral nutrient elements
*Absence of growth-restricting substances
Radiant or solar energy-the quality, intensity, and duration of light are all important. Plants do differ in their response to light of varying intensity and duration.
Atmospheric factors
The behavior of plants in relation to day
length is called ____ thus the terms short day, long day and indeterminate piants.
photoperiodism,
____ are those that complete their reproductive cycie over a wide range of day lengths.
Indeterminate plants are
Heavier fertilization may encourage greater vegetative
growth and better environmental conditions of certain disease organisms. The imbalance of nutrient available to plants may also be the reason for increased incidence of disease Certain pest impose added fertilizer requirement.
Biotic factors
The ____ available to plants may also be the reason for increased incidence of disease Certain pest impose added fertilizer requirement.
imbalance of nutrient
____ are serious deterrent to maximum yield. Although sometimes____ are considered necessary evils since they prevent permanent loss of nutrients through leaching by nutrient absorption.
weeds
