The work presents the results of investigations conducted in 2004-2007 to evaluate the residual effect of summer catch crops ploughed as green manures on productive-economic effects of sweet corn cultivation. The experiment was carried out in east-central Poland (52°03'N, 22°33'E). The following summer catch crops were grown: phacelia, amaranth, sunflower, serradella and faba bean. The catch crop seeds were sown in 2004-2006 at three dates: on the 21stJuly, 4th and 18th August. The effect of summer catch crops was compared to FYM applied at the rate of 40 t•ha-1. The catch crops biomass (roots + above ground parts) and FYM were incorporated in the third decade of October. Sweet corn seeds (6 kg•ha-1) were sown in mid-May, in the years 2005-2007, at the between- and inter-row spacing of 65 × 20 cm. Sweet corn ears were hand-harvested at the stage of milk maturity of kernels, at the turn of August and September. During the harvest marketable yield of ears (t•ha-1) and number of marketable ears per 1 ha were determined. Economic evaluation of sweet corn cultivation under diversified organic fertilization was conducted according to the standard gross margin method. The calculation was based on the 2014 prices. The highest yield ...
For the assessment of the economic efficiency of irrigation in selected crops presented in this paper, we used results obtained from field experiments conducted in 2006-2012 at the Research Station of the University of Science and Technology in Bydgoszcz by employees of the Department of Land Reclamation and Agrometeorology. These studies were focused on the effects of irrigation on the yield of potatoes, malting barley and corn grown for grain. To calculate the economic efficiency we used the method of calculation the increase in direct surplus. The results indicate that irrigation was economically justified not in the all cases. For potatoes the direct surplus was increasing along with the increasing of the irrigated area, the losses were noticed only in the case of 1-hectare variant. In contrast, there was no economic justification for the use of irrigation in the production of malting barley, regardless of the irrigated area. Same results of economic effects, as in the case of barley, were obtained using drip irrigation in corn grown for grain. The presented calculation shows that the cost irrigation per 1 ha decreases as the irrigated area increases. ...
To evaluate the economic efficiency of irrigation in corn cultivated for grain, production effects were used, which were obtained from studies conducted by researcher team from the Department of Land Reclamation and Agrometeorology at the Experiment Station of the UTP University of Science and Technology in Bydgoszcz in 2005-2016. The research covered the effect of irrigation on yielding of the crop. Economic efficiency calculations were made using the direct surplus increase calculation method. In each variant irrigation enhanced production effects. It was not always economically justified, however. The irrigation costs (for drip and sprinkler irrigation systems) per hectare were decreasing with an increase in acreage. Applying drip irrigation was economically unjustified in moist years and on average in the multi-year period. In the years with dry and average precipitation conditions the direct surplus was positive, except for irrigation of 1 ha. As for the sprinkler-irrigation system, a lack of economic efficiency was reported in moist years, whereas in dry and average years as well as on average in the multi-year period, except for 1 hectare acreage, corn sprinkler-irrigation was economically justified. ...
The work presents the research results of impact and effects of applying irrigation by sprinkling machine on the yield of medium-early potatoes. The research and observation conducted in growing seasons 2011,2012 and 2013, on the private agricultural and production farm, in Kurów, located in the Ostrów Wielkopolski district, in the borough of Nowe Skalmierzyce, in the Wielkopolska Province. The area of the farm was 31 ha and 4 ha of potatoes were irrigated. The study confirmed that by using interventional irrigation in periods of water deficits, the medium-early potato yield increased by 30%, against the non-irrigated area. The evaluation of the research results also showed that patchy distribution of precipitation, in the analyzed growing season had an adverse influence on the crop. Frequent and long dry periods contributed to losses and decrease in potato yield. ...
