FIELD CROP PRODUCTIVITY FACTORS: ANALYSIS OF TERMINOLOGY, BUILD AND THE CAPACITY OF USEFUL APPLICATIONS
To predict yield and agroclimatic zoning of field crops used information about major climatic factors measured at the weather station. Many experts consider it advisable to use special indicators (ratios, indexes), incorporating two main climatic factors: ambient air temperature and rainfall. There are requiring accounting in developing indicators, the differences in the needs of heat and moisture between different cultures, and within one and the same culture during its growth and development, for different interfacial periods. One of the attempts to develop suitable indicators are proposed by V.P. Dmytrenko productivity ratios of field. Construction productivity coefficients for temperature ( CT1 and CT2 ), based on the idea of at (the so-called law optimum) adequately described by the exponential function are acceptable. However, the means of obtaining estimates of CT1 and CT2 require adjustments. Construction productivity coefficients for precipitation ( CR1 and CR 2) are incorrect and often result in pointless assessments. Attempts to apply them, as calculated using the CR1 and CR2 integral indicators of productivity for temperature and precipitation as period, - CTR1, CTR2, and around the vegetation cycle, - STR1, STR2, lead to wasting time, money and effort. There is a need to develop coefficients yields of field crops, focused on finding all the required parameters for calculation demonstration functions according to researchers of the empirical data.