Przeglądaj wg Autor "Laskowski, S."

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    Porównanie działania mieszanek wieloletnich i jednorocznych na wzrost niektórych wskaźników żyzności gleby
    (1964) Laskowski, S.; Żurański, S.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin; Wyższa Szkoła Rolnicza w Szczecinie. Rolniczy Zakład Doświadczalny - Lipki
    Field experiments carried out on light podsol soil in R.Z.D. Lipki WSR Szczecin and R.R.Z.D. in Barzkowice in the years 1960-1962 proved that: Best crops are produced in showery years by a mixture of red clover with English rye-grass and in dry years by a mixture of common birds foot trefoil with English rye-grass. These mixtures differ significantly from the others by producing a rise in the fertility indices (humus, nitrogen, CaC). Winter after-cultures cause half as much rise in the amount of organic compounds in the soil as the soil-structure-creative mixtures.
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    PozycjaOpen Access
    Porównywanie zmianowań stosowanych na glebach lekkich.
    (1964) Laskowski, S.; Dzienia, S.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Hodowli Zwierząt
    The field experiments that for a period of 3 years (1960-1963) had been carried out on weak limed complete sands in R.Z.D. Lipki allow the following preliminary conclusion: 1. A direct plantation of ear (spiky) plants after ear plants successively for three or even for two years causes a fall in the yield in of the crop rotation. 2. The best rotation link appears to be: a) maize-spring wheat + kct-kct; medium b) maize-spring wheat-green field pea Worse: c) maize-spring wheat-seed field pea Worst: d) maize-green field pea-summer swede-like rape. 3. On weak soil, cultivation of field pea for fodder is economically more effective than maize for green forage.
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    PozycjaOpen Access
    Wpływ dynamiki uwilgotnienia żuławskiej mady ciężkiej na przyrost masy organicznej i plony pszenicy ozimej oraz buraków cukrowych
    (1964) Laskowski, S.; Zawistowski, F.; Krużycka, M.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin; Wyższa Szkoła Rolnicza w Szczecinie. Z R.R.Z.D. w Starym Polu; Wyższa Szkoła Rolnicza w Szczecinie. Z R.R.Z.D. w Starym Polu
    Investigations carried out in 4 years (1957-1960) on a set field in R.R.Z.D. Stare Pole have brought evidence that even layers of heavy alluvials are in spring time lacking oxygen. In the lower parts of the soil profile the period of optimal moisturing begins late, not till the middle of June, and lasts till the third decade of September. The high water levels occuring in the layers under arable soil in the Żuław alluvials exercise detrimental influence on the incre ase of organic mass as well as on the yields.
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    PozycjaOpen Access
    Wpływ sposobu pogłębiania orki przedzimowej na dynamikę niektórych właściwości fizyko-chemicznych gleby lekkiej i plony ziemniaków
    (1964) Laskowski, S.; Zbieć, I.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin
    A two-year experiment has shown that Subsoil Winter Ploughing, and a very deep ploughing caused a temporary improvement of the quality of the soil humus thanks to an increase of humic acids to fulvous acids ratio. Deep, deepened and very deep ploughing gives a significant rise in yield as compared with shallow ploughing. Mole ploughing on light soil did not show any positive production effects. The harrowing of the Winter Ploughing causes a deterioration of the field structure and a decrease of the potato yield. However, it has a positive effect on the actual humidity and full water capacity of the soil.
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    PozycjaOpen Access
    Wpływ stanowisk w zmianowaniu na plony buraków pastewnych
    (1964) Laskowski, S.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin
    Considering the results of the 3 year’s (1960-1963) field experiments carried out on noncomplete weak limed sand in R.Z.D. Lipki it may be stated that: 1. Underployghing of the remainders of the podded plant crop and stubble crop together with farm yard manure cause the preservation of effective nitrogen contents in the soil during the whole vegetative period, while after nonpapilonaceous crops the observed increase in effective contents subsides afterwards, due either to the fact that the beet make use of the availing nitrogen forms or to downwashing. 2. The best yield of fodder beet is to be expected when planted after rye with underploughed stubble crop, or after secondary maize crop that follows a winter sown mixture.
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    Wstępne badania nad działaniem drenowania kreciego kretowania uprawnego oraz pogłębiacza i orki głębokiej na madzie ciężkiej Żuław Wiślanych
    (1959) Laskowski, S.; Fenglerowa, W.; Wyższa Szkoła Rolnicza w Szczecinie. Katedra Ogólnej Uprawy Roli i Roślin; Wyższa Szkoła Rolnicza w Szczecinie. Zakład Doświadczalny Stare Pole
    The main purpose of the work undertaken was to find an, as universal as possible, explanation of the effect of mean and deep tillage, mole tillage and mole draining on plant yielding, within a crop rotation. All these operations are executed on heavy mean-glacy middle aluvial soils. Tho influence of these kinds of ploughing on microbiological conditions of heavy mades is represented in diagram 2. It was stated that the effects of mean (28— 30 cm) and deep tillage (30—35 cm) within a crop rotation are very similar. As compared with shallow tillage (20—23 cm) the above mentioned operations, contribute to a crop increase in the first and second year, after they have been applied. In the third year the application of these tillages did not show any advantageous effects and on the contrary has caused a decrease of crop yielding. Among all tractors being at present in use a Famo Boxer, DT-54 and Fiat 55L, can only be applied for mean deep tillage executed with a 3-furrow plough and provided with the fore-shares. The application of a share-shaped subsoiler does not always increase the crop yielding within a crop rotation. The subsoiler applied in shallow tillage causes in the first year a rise of crops similar to that obtained by mean deep ploughing. In the second year alter its application a distinctly lower effect has been observed as compared with that of mean deep tillage. Hence it can be supposed that the effects resulting of subsoiler application in shallow tillage are of a shorter duration than of those mean deep tillage. At the same time the power required for shallow tillage with a subsoiler is much higher as compared with the one required for mean deep tillage. Mole cultivation executed in case of a deep tillage by means of a suboiler of Stare Pole Works construction (Fig. 1) creates in a particular depth some advantageous conditions for microflora and microfauna and at the same time renders possible the development and growth of the roots in crop rotation. The results of our investigation have shown that mole tillage exerts a significant effect on the growth of sugar beet crop, regardless, whether this operation was applied directly (Table 6) or resulted as a successiveness (table 7). No advantageous influence of mole tillage as well as of others special cultivations was observed on potato crop. On the basis of an analysis carried out on the effect of mole draining on the development of soil microflora it can be stated that this operation results above all in microflorp growth in the uppersoil layer (table 11 and 12). Mole draining executed at a depth of 55—60 cm. and at a distance among individual drainage courses of 1,5 cm. exerts within a crop rotation an advantageous effect as an agrotechnical operation. In such a case it can be replaced with succes by mole cultivation which is found to be a much cheaper operation and gives similar effect if compared with the former (tables 5, 6 and 7). The influence of mole draining as well as mole tillage on microflora was expressed in the first year after its application by ;a raise of the quantity of bacteria (general quantity and asotobacter) and by a distinct increase of their activity i. e. fall of relative quantity of bacteria spores. Above all the effect of mole draining on micro flora was evident in deeper layers of the soil 25—30 cm). In the second and even third year after the above mentioned operation has been performed, the reaction of microflora was also disclosed in the upperlayers of the soil, but not as distincly as it was stated for the deeper ones. In the deeper layers of soil, not only the growth of general quantity of bacteria and azotobacters was stated, but also a certain intensification of nitrification processes was noticed, if compared with deep tillage. It is necessary to stress that on experimnetial fields where mole draining and mole cultivation was performed a greater activity of nitrification processes in deeper soil layers (25—30 cm) was stated as compared with the ones where only a simple tillage took place. At the end of the work it is necessary to conclude that in a crop rotation~the results of a complex effect of special cultivations depend not only on plants but also on water deficiency established in relation to the optimal water demand of various plant species in their critical period. The higher level of agrotechnic resulting from the application of special cultivations is the better expressed the greater are water deficiency in small critical periods. The development and microflora activity, especially in surface layer of the soil, depends more on average precipitations than on application of special cultivations. Lack of precipitations has restricted significantly the microbiological dynamic of soil and in connection with it has augmented the bacteria transformation from active forms into spores (table 5).