The Law Op Diminishing Returns in Agriculture
نویسنده
چکیده
A correct understanding of the law of diminishing returns both as to its application, as well as to its statement as a principle, is fundamental in any study designed to measure the effect of increasing units of an input factor upon the output whether this output be in the form of plant growth or animal production. Immediately following Von Liebig's emphasis of the need by plants of various mineral nutrients necessary for growth, attempts were made to bring under some law the relation existing between added units of any input factor necessary for plant growth and the additional outputs caused by those additional units. Von Liebig developed his law of the minimum, namely, that the productivity of a field is in direct relation to the necessary constituent contained in the soil in the smallest quantity (5, ^. lOSy, In this law he recognized not only the importance of the limiting factor in plant growth but also the necessity of a balanced plant-food supply. The law itself, however, was not correctly stated, and it took the thought and research of four generations of soil chemists to develop a sufficient body of data under carefully worked out control conditions to show (1) that the law as Von Liebig stated it was incorrect and (2) to make a correct statement of the law possible.
منابع مشابه
Optimal decision making and matching are tied through diminishing returns.
How individuals make decisions has been a matter of long-standing debate among economists and researchers in the life sciences. In economics, subjects are viewed as optimal decision makers who maximize their overall reward income. This framework has been widely influential, but requires a complete knowledge of the reward contingencies associated with a given choice situation. Psychologists and ...
متن کاملApplication of the law of diminishing returns to estimate maintenance requirement for amino acids and their efficiency of utilization for accretion in young chicks
H. DARMANI KUHI , E. KEBREAB *, S. LOPEZ 3 AND J. FRANCE 4 1Animal Sciences Group, Faculty of Agriculture, University of Ilam, Ilam 69315/516, Iran 2National Centre for Livestock and Environment, Department of Animal Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada Departamento de Producción Animal, Universidad de León, E-24007 León, Spain 4Centre for Nutrition Modelling, Departme...
متن کاملInformation Flow in Networks and the Law of Diminishing Marginal Returns: Evidence from Modeling and Human Electroencephalographic Recordings
We analyze simple dynamical network models which describe the limited capacity of nodes to process the input information. For a proper range of their parameters, the information flow pattern in these models is characterized by exponential distribution of the incoming information and a fat-tailed distribution of the outgoing information, as a signature of the law of diminishing marginal returns....
متن کاملEffect of Physical State of Fatty Acids on the Physical Properties of PGP-Based Emulsified Edible Film
Many factors influence physical properties of edible composite films fabricated from hydrocolloids and lipids. Novel edible emulsified films were made using PGP, glycerol and stearic (SA) or oleic (OA) fatty acids by Tween-80 addition and emulsification of filmogenic solutions. In this study, the effect of physical state of fatty acids on the pistachio globulin protein (PGP) edible film prop...
متن کامل