Abstract.
Agrophysical properties of the dark gray podzolic heavy-loamy soil and typical heavy-loamy chernozem within the seed layer (structural composition, bulk density, moisture content) in the spring before sowing of spring crops in 2013-2015 were investigated. It was determined that agrophysical properties of dark gray podzolic soil formed within seed layer as a result of traditional presowing tillage were different from the assumed ones (according to current agronomical requirements): there were lumps in sowing layer, content of aggregates of agronomically useful size was significantly smaller than the permissible; bulk density of the seed layer was too high. Good moisture reserves formed during the autumn and winter period. Parameters of chernozem typical structure before barley sowing in 2014 were acceptable except the lumps presence of sowing layer. Tillage by experimental tool formed better structure of over-seed layer than traditional cultivation.
References
1. Atkinson B.S.,2007. Using selected soil physical properties of seedbeds to predict crop establishment / B.S. Atkinson, Sparkes D.L., Mooney S.J. // Soil and Tillage Rеsearch. № 97. Pp. 218-228
2. Ardvisson J., 2000. Early sowing – a system for reduced seedbed preparation in Sweden / J. Ardvisson, Rydberg T., Feiza V. // Soil and Tillage Rеsearch. № 53. Pp. 145-155
3. Atkinson B.S., 2008. Identification of optimum seedbed preparation for establishment using soil structural visualization PhD Summary Report No. 6, November 2008 Project No. RD-2004-3031 42 p.
4. Medvedev V.V., 2016. Agronomical requests to the technology and tools for seedbed preparation of chernozems / V.V. Medvedjev, I.V.Plisko, O.M. Bigun [ta in.] // Visnyk agrarnoi' nauky.№ 3.Pp. 43-48.
5. Soil-cultivating unit: pat. 82554 Ukrai'na : MPK A01V 49/06 (2006.01) / V.K. Puzik, V.V. Medvedev, V.F. Pashhenko, S.I. Kornijenko, A.O. Batulin, S.I. Hekalo, N.G. Ptashyns'ka; – № u 2013 03966; zajavl. 01.04.2013; opubl.12.08.2013, Bjul. № 15. – 9 s. : il.
6. DSTU 4744:2007 Soil quality. Soil structure composition analysis by screening method in modification of N.I.Savvinov – Chynnyj vid 2008-01-01. – K.: Derzhspozhyvstandart Ukrai'ny, 2008. – 12 s. – (Nacional'nyj standart Ukrai'ny).
7. DSTU ISO 11272:2001 Soil quality. Determination of dry bulk density. (ISO 11272:1998, ІDТ) – Chynnyj vid 2003-07-01. – K.: Derzhspozhyvstandart Ukrai'ny, 2003. – 15 p. – (Nacional'nyj standart Ukrai'ny).
8. DSTU ISO 11465:2001 Soil quality. Determination of dry matter and water content on a mass basis - Gravimetric method. (ISO 11465:1993, IDT) – Chynnyj vid 2003-01-01. Kyiv: Derzhspozhyvstandart Ukrai'ny, 2003. – 11 s. – (Nacional'nyj standart Ukrai'ny).
9. Medvedev V.V., 2011. Soil water properties of Ukraine and agricultural crops water supply / V.V. Medvedev, T.N. Laktionova, L.V. Dontsova. – Kharkiv: Apostrof. 224 p.
10. Textbook. — Gudz' V.P., Shuvar I.A., Junyk A.V., Ryhlivs'kyj I.P., Mishhenko Ju.G. Za red. Gudzja V.P. — K. : Centr uchbovoi' literatury, 2014. – 336 p.
11. Hromjak V.M., 2015. Recommendations for sunflower cultivation in soil and climate conditions of northern Steppe of Ukraine (on example of Luhansk region) / V.M. Hromjak, V.V. Nalyvajko, K.I. Tohtar' [ta in.]. NNC «IGA imeni O.N.Sokolovs'kogo». 15 p.