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1

The possibilities of reduction of winter barley chemical protection by growing variety mixtures. Part II. Effect on yield

100%
Tratwal A., Law J., Philpott H., Horwell A., Garner J.
Journal of Plant Protection Research
|
2007
|
tom 47
|
nr 1
In the four-year experiment the impact of four different barley varieties and selected two- and three-component mixtures were tested. The studies were carried out at two sites: Experimental Station for Variety Testing Słupia Wlk. (Wielkopolska region) and Plant Breeding Station Bąków (Opole District) during four growing seasons (2001/2002-2004/2005). The aim of the studies was to evaluate the yield through growing barley variety mixtures in combination with reduced use of fungicide and application dose rates. Positive effects (1-15% yield increase in mixtures compared to pure stands) were observed. On the base of obtained results it can be stated that winter barley variety mixtures can constitute an alternative way of growing winter barley, especially at low-input and ecological agriculture.
2
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Foliar application of Tecamin max® to alleviate water deficit effects on yield and water-use efficiency (WUE) of okra

80%
Abood M. A., Al-Shammari A. M. A., Hamdi G. J.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2019
|
tom 18
|
nr 2
One of the ways to reduce the water consumption by plants while maintaining their proper quality is to use substances that limit excessive transpiration. Three preparations at following concentrations: Moisturin (10%), Root-Zone (4.5%) and Vapor Gard (1%), were used in the experiment. Moisturin and Vapor Gard were applied in the form of a single spray, and Root-Zone as a single irrigation in mid July.The aim of the research was to assess the effect of several anti-transpirants on some biometric features of the ‘Tardiva’ panicled hydrangea depending on the frequency of irrigation. The following parameters were measured: area, perimeter, width and length of leaf blade, length and width of inflorescences, and the diameter of shoots. Treatment of H. paniculata cv. ‘Tardiva’ with Root-Zone and Moisturin anti-transpirants with a single irrigation every other day allows to reduce the water consumption and obtain shrubs of a quality comparable with plants irrigated twice a day. The use of Moisturin with a twice daily irrigation positively affected the length and width of inflorescences.
3
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Egusi melon-okra intercrop: yield effects as influenced by the interaction of time of introducing okra x cropping systems at Makurdi, Nigeria

80%
Ijoyah M. O., Fanen F. T., Egbe M. O.
International Letters of Natural Sciences
|
2015
|
tom 38
A field experiment was conducted from August to November, during the 2012 and 2013 cropping seasons at the Research Farm, University of Agriculture, Makurdi, Nigeria, to evaluate the yield effects of egusi melon-okra intercrop as influenced by the interaction of time of introducing okra x cropping systems, and to assess the yield advantages of the intercropping system. The experiment was a 3x3 split plot arrangement of treatments, fitted in a randomized complete block design (RCBD), replicated four times. The cropping systems (sole egusi melon, sole okra and egusi melon-okra mixture) constituted the main plots, while the time of introducing okra (mid August, late August and early September) into egusi melon were allocated to the subplots. Results of study showed that to obtain optimal intercrop yield of okra in an egusi melon-okra intercrop, it is appropriate planting okra at the same time with egusi melon in mid August, while introducing okra into egusi melon in late August is appropriate to obtain optimal intercrop yield of egusi melon. Intercropping egusi melon and okra significantly (P≤0.05) reduced yields of egusi melon (37.5 % and 40.5 % respectively, in years 2012 and 2013) and that of okra (9.7 % and 16.9 % respectively, in years 2012 and 2013). The highest mean land equivalent ratio value of 1.57 and highest land equivalent coefficient values of 0.53 and 0.70 were respectively recorded, in years 2012 and 2013, for okra introduced into egusi melon in early September. These recommendations are appropriate for Makurdi location, Nigeria.
4
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Influence of mineral fertilisation on the yield and macroelement content in sugar beet

61%
Acta Agrophysica
|
2017
|
tom 24
|
nr 2
The aim of this study was to assess the influence of mineral NPK, Mg and micronutrient fertilisation on the content of macroelements and root yield of a sugar beet cultivar called Khazar. The effects of three fertilisation levels were assessed. Additionally, the highest NPK dose was analysed in treatments with NPK + Mg and micronutrients (B, Cu, Zn, Mn). The increasing level of NPK fertilisation as well as the nutrition with magnesium and micronutrients caused an increase in root yield. The highest yield of roots was achieved by beet plants fertilised with the high NPK dose combined with magnesium, boron, copper and zinc. It was demonstrated that roots fertilised with the 3NPK dose and magnesium tended to accumulate more N-total. At the same time, the applied micronutrients contributed to a decline in the N-total content of dry matter in roots. The analysed fertilisation with NPK and micronutrients did not affect the content of phosphorus, potassium and calcium in either of the two beet organs. In general, beet leaves were characterised by higher concentrations of nutrients than roots.
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