Modern system of agriculture provides active use of vegetable remains as local organic fertilizer. However, the cultivation of crops on various agricul-tural background changes chemical composition of vegetable remains resulting in unpredictability of their transformation in humus substances. The re-searches on chemical composition of vegetable remains studying were conducted on the perma-nent establishment of Northern Trans-Urals SAU which is located in the northern forest-steppe. From all studied cultures peas took leading place accord-ing to the content of nitrogen in the vegetable re- mains - 1.6 % of the weight. In other cultures the content of nitrogen varied within 0.5-0.7 % of the weight. The maximum value of the content of po-tassium was noted in oats straw - 1.6 % of the weight, in other grain crops it varied within 0.8- 1.0 %. The content of phosphorus in the vegetable remains of crops was minimum - 0.2-0.3 % of the weight. High content of calcium was noted in the vegetable remains of colza and peas - 1.8 and 2.0 % respectively that more than twice exceeds the values of other cultures. The cultivation of grain crops on options with planned productivity of up to 6.0 t/hectare of grain promoted the accumulation of nitrogen in straw up to 1.2 % of the weight exceed-ing the control twice. When modeling the process of accumulation of nitrogen in collateral production of grain crops grown up at various level of mineral food it is possible to use the regression equation of type: ; where x - the dose of nitric fertilizers, kg of active ingredient on hec-tare; y - the content of nitrogen in straw, per cent. The coefficient of approximation of this equation makes more than 0.9 units. The introduction of in-creasing doses of mineral fertilizers practically did not influence the content of phosphorus and potas-sium in grain crops straw.
chemical composition of straw, spring wheat, oats, barley, mineral fertilizers, lixivi-ous chernozyom, Northern Trans-Urals
1. Lazarev A.P., Vaymer A.A., Skipin L.N. Ekologicheskie aspekty ispol'zovaniya cher-nozѐmov Zapadnoy Sibiri. - Tyumen', 2014. - 362 s.
2. Abramov N.V. Sovershenstvovanie osnov-nyh elementov sistem zemledeliya v leso-stepi Zapadnoy Sibiri: avtoref. dis.. d-ra s.-h. nauk. - Omsk, 1992. - 32 s.
3. Belkina R.I., Maslenko M.I. Rol' udobre-niy i azotnoy podkormki v povyshenii ka-chestva zerna pshenicy // Sibirskiy vestnik sel'skohozyaystvennoy nauki. - 2012. - № 2. - S. 35-38.
4. Erѐmin D.I. Produktivnost' zernovogo s zanyatym parom sevooborota v severnoy lesostepi Tyumenskoy oblasti: avtoref. dis. … kand. s.-h. nauk. - Tyumen', 2003. - 18 s.
5. Yuskin A.A., Makarov V.I. Vliyanie sistem zemledeliya na himicheskiy sostav solomy zernovyh kul'tur // Vestnik Izhevskoy gosu-darstvennoy sel'skohozyaystvennoy akade-mii. - 2009. - № 1(18). - S. 76-79.
6. Erѐmin D.I., Popova O.N. Agroekologiche-skaya harakteristika mikromicetov, obita-yuschih v pochve // Vestnik Gosudarstvennogo agrarnogo universiteta Severnogo Za-ural'ya. - 2016. - № 1 (32). - S. 12-18.
7. Lazarev A.P., Maysyamova D.R. Skorost' razlozheniya posleuborochnyh ostatkov po-levyh kul'tur v chernozѐmah za osenne-vesenniy i godovoy period // Pochvovede-nie. - 2006. - № 6. - S. 751-757.
8. Erѐmin D.I., Ahtyamova A.A. Vliyanie urov-nya mineral'nogo pitaniya na skorost' raz-lozheniya solomy yarovoy pshenicy v leso-stepnoy zone Zaural'ya // Agroprodovol'-stvennaya politika Rossii. - 2015. - № 2. - S. 68-71.
9. Abramov N.V., Erѐmin D.I. Formirovanie profilya chernozѐmov vyschelochennyh Se-vernogo Zaural'ya v usloviyah dlitel'noy raspashki // Dostizheniya nauki i tehniki APK. - 2012. - № 3. - S. 7-9.
10. Erѐmin D.I., Erѐmina D.V., Fisunova Zh.A. Fizicheskie svoystva vyschelochennyh cherno-zѐmov Severnogo Zaural'ya v usloviyah dli-tel'nogo sel'skohozyaystvennogo ispol'zovaniya // Agrarnyy vestnik Urala. - 2009. - № 4. - S. 60-65.
11. Ivanenko A.S., Ivanenko N.A. Optimal'no sochetat' posevy yarovyh i ozimyh zerno-vyh kul'tur v Zaural'e // Sovremennye problemy nauki i obrazovaniya. - 2015. - № 2. - S. 741.
12. Kulikova A.H., Hisamova K.Ch. Povyshenie effektivnosti primeneniya solomy kak udobreniya pri vozdelyvanii yachmenya // Ag-rarnyy nauchnyy zhurnal. - 2015. - № 4. - S. 13-17.
