The higher vascular plants that cover the land areas of the earth and inhabit the seas have a crucial role in mankind’s existence and survival. They furnish us with food. They provide our livestock with forage, They supply the air we breathe with oxygen. From them, we obtain fibers for clothing, wood for shelter and furnishings, and medicines that we use to alleviate our ailments. Not only mankind’s primary biological needs but also many of the items used in everyday life are obtained from higher vascular plants. The term higher vascular plants refer to those plants that produce seeds, Included among the items obtained are paper; rubber; species; non-alcoholic beverages, such as tea, cocoa, and coffee; and alcoholic beverages, such as wine, beer, whiskey, gin, and vodka. Moreover, higher vascular plants minister to the aesthetic needs of humans by beautifying our physical environment. In fact, these plants are the most prominent feature of the natural green landscape. The fact that we are completely and absolutely dependent on higher vascular plants for the necessities of life makes it imperative that we gain as thorough knowledge as possible of the science of plant physiology Moreover, our insatiable curiosity about the world in which we live provides ample justification for studying plant physiology.
|Practical aspects of crop physiology|
Quite apart from the considerable theoretical significance of crop physiology in helping us understand the world in which we live, knowledge of crop physiology is essential to all fields of applied botany-agronomy, floriculture, forestry, horticulture, plant breeding, plant pathology, etc. All these applied sciences depend on plant physiology for information about how plants grow and develop. Plant physiology will probably also assume an increasingly important role in agriculture research programs. As the world population increases, mankind faces enormously complex problems. Their solutions will require input from many sources. One of the primary tasks of the future will be to increase food, forage, fiber, and wood production substantially throughout the world. Future agricultural research programs will continue, as in the present, to have as their major goals the production of new and better varieties and strains of crop plants; the improvement of plant protection against insect disease and weeds; the control of soil fertility, and an increase in mechanization efficiency. But in addition, there will be a sharp intensification of
The important place that agriculture occupies in our national development is evidence of the fact that our government is conscious of these problems. It is in the solution of such problems that plant physiology plays an important role. A proper understanding of the needs of the plants and of the various phenomena going on them and their significance and the application of such understanding in practice goes a long way to help us to control the life of the plants in such a way as to obtain from the products of improved quality and increased quality.