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Selected family farms located in Sudeten mountain region were inspected in 1996. Apart from typical ways of agricultural production the farms undertook some agrotouristic activities. Human labour resources larger than average in the region were at disposal on investigated farms; they were also pretty good equipped with the fixed capital. The agrotouristic farms achieved very low economic efficiency...
The surveys referred to the estimation of crop yields, their variability and growing tendencies in yielding of cereals and potatoes, were carried out on private farms in Jelenia Góra region. The survey method included basic statistical measures such as: valorization index, variation coefficients, standard deviation and the least square method used in calculation of growing tendency in crop yielding...
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