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Cow longevity in herds of different milk production levels and herd size. The effect of herd production level and herd size on cow longevity was studied using the SYMLEK system data on 12045 Polish Holstein-Friesian cows (Black-and-White variety) from 1371 herds. The cows, which belonged to the active population in Pomerania and Kujawy, first calved in 2008 and were used or disposed from the herds by the end of 2015. FREQ and GLM procedures from the SAS package were used in the statistical calculations. With increases in herd size (from ≤20 to >200 cows) and herd production level (from ≤6000 to 9000 kg milk), the culling level increased (p≤0.01) while the proportion of cows sold and alive decreased. Cow longevity was differentiated (p≤0.01) by herd size. As the number of cows in the herd increased, the lifespan and the length of productive life, as well as number of calvings decreased. The effect of herd production level on cow longevity was not statistically confirmed.
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Analysis of the current level of table potato production was based on the survey carried out on 120 farms located in the area of Siedlce community; their activity was focused mainly on table potato production. Collected data referring to the year 2004 were analysed statistically, what enabled to determine the relationships and phenomena occurring in the field of potato production. Table potatoes were cultivated on examined farms on average area of 2.15 ha and their share in cropping structure was higher in comparison with the whole country. However, in the nearest future, a dropping tendency should be expected as almost half of the farmers intend to reduce the area of potato cultivation. Qualified seed potatoes were used by 73.3% farmers under study. Most frequently they cultivated a few cultivars, to adjust their produce to the requirements of largest number of consumers. The survey revealed that early potato tuber yield was significantly modified by: delaying planting time, tuber spacing in the row, number of chemical treatments, N, P and combined NPK fertilization and delaying the harvest time. Significant relationships were also found between late potato yield and planting density, P, K and combined NPK fertilization. The farmers growing potatoes on larger areas applied cultivation practices more carefully and - as a result - they obtained higher tuber yields.
. The general objective of this study is to present the economic situation of Hungarian broiler production. A deterministic model was constructed to investigate the role of technical efficiency on profitability. As the results demonstrate, in current economic conditions broiler production can be profitable if the European Production Efficiency Factor (EPEF) is above 300-310. A lower level of technology, cheaper feed and chicks in addition to their weaker quality deteriorates the technical efficiency of production, which results in poor economic indicators. Therefore, it is not worth saving on either the level of technology or the quality of chicks or feed. Thus, the key purpose of future developments should be: increasing efficiency.
W niniejszym opracowaniu dokonano analizy porównawczej produkcji rolniczej województwa lubelskiego i wielkopolskiego. Uwzględniono uwarunkowania przyrodnicze i organizacyjno-ekonomiczne produkcji rolniczej Lubelszczyzny i Wielkopolski. Stwierdzono, że o relatywnie niskim wykorzystaniu potencjału rolnictwa województwa lubelskiego decydują warunki organizacyjne i ekonomiczne.
The aim of this study is qualification of poultry products meat in feeding of man and also change of production and consumption dynamics. On the period of years 1995-2004 domestic production of poultry livestock showed increased tendency.
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