Results of researches carried out in stationary multi factorial experience, plotted in 1991, were generalized in the article. Different influence of cultivated crops
in crop rotation on agro physical properties of active fertile layer of old irrigated leached chernozem
was determined on the base of material generalization.
Positive role of alfalfa for improvement of agro
Physical soil properties were revealed. Quantity of agronomically valuable aggregates and water proof
of soil structure are increased because of it.
In the soils of rice fields, eluvial gley processes
develop, which are manifested in redistribution of silty
particles along the profile, water-soluble humus,
mobile compounds of iron and phosphorus. Most
intensively, these processes are developed in meadowbog
soils, confined to closed depressions of the plains
plain. Meadow-black soils lying on elevated relief
elements have more favorable physical, physicochemical
and oxidation-reduction properties for
cultivating rice and accompanying crops in crop
rotation. The highest yield of rice is formed on high
checks and higher at 12,4 c/ha than on low ones
In the soils of rice fields, eluvial gley processes
develop, which are manifested in redistribution of silty
particles along the profile, water-soluble humus,
mobile compounds of iron and phosphorus. Most
intensively, these processes are developed in meadowbog
soils, confined to closed depressions of the plains
plain. Meadow-black soils lying on elevated relief
elements have more favorable physical, physicochemical
and oxidation-reduction properties for
cultivating rice and accompanying crops in crop
rotation. The highest yield of rice is formed on high
checks and higher at 12,4 c/ha than on low ones
The article gives the results of researches carried out on stationary sites of typical agricultural landscapes to register the development of erosion processes. Systems of phytomeliorative and soil protective techniques and methods on shallow gully and gully-field types of agricultural landscapes in southern black soil zone of Rostov region are also proved
The article presents the results of the study of the
effect of the size of the explant clonal rootstocks for
stone fruit crops of the Krymskaya OSS VIR VSL-1,
VSL-2, LC-52, RVL-1, RVL-7, VVA-1, AP-1 injected
in vitro and concentration vitamins and
phytohormones in a nutrient medium on the efficiency
of introducing in vitro of these rootstocks. The optimal
size of the injected in vitro explant was determined and
nutrient medium in the first stage of micropropagation
was optimized. The optimal size of the dissected
meristem, which provides the maximum percentage of
explant initiation is 0.4 mm. The modified version of
the nutrient medium based on the Murashige and Skug
prescriptions with a reduced content of vitamins B1 0.1
mg / l, B6 0.4 mg / l, PP- 0.4 mg / l, and phytohormone
6-BAP - 0.3 mg / l. at the first stage of cultivation of
explants of clonal rootstocks for stone fruit crops is
optimal. The survival rate of explants in all tested
samples of clonal rootstocks on this modified nutrient
medium was in the range of 92.5-97.5%
We attempt to combine professional agronomic knowledge with familiarity with graphic art presented in the form of a poster in the paper. The term "poster" is considered a large loose-leaf edition, combines visual and typographic elements and execute graphic communications. The main idea of the poster is to convey the information to the reader quickly and accurately. In the study of the material we have formed complex scientific and educational resources on the history of agricultural science, including the history of the popularization of agronomic knowledge. In our work, the poster is treated as an object of analysis, as the material of social and cultural analysis and as a tool to gather information on the development of agronomic knowledge through their visualization. In the course "History and methodology of scientific agronomy" one of the competencies of students is familiarity with the methodology popularization of agronomic knowledge, understanding of what is happening. In this regard, an attempt was made to consider the Soviet poster as a source of information on the development of scientific agriculture in the period from 1917 to 1980. The aim was to analyze the main events of this period, elements of the technology of agricultural production, species and varietal diversity of crops, as well as various events in the agricultural sector. The article considers four basic types of posters: promotional, political, instructional, scientific and educational. Each of these types of posters performs its function. The poster covered all stages of agrarian sector of the country, was a historical reflection of the Soviet period and always remained mobile, online and popular art form. Today, his role is small, because it has changed the ways of presenting information. However, its historical role unchanged, he has served as the Foundation of the modern advertising industry, including agronomic knowledge
In the conditions of middle valley of the Lena River on
the cryogenic, inundated, cespitose and chernozemic
soils different steppe communities differently react on
dietary regime. Herb-grass phytocenosis at organic
dietary regime is reformed in cereal phytocenosis with
the contents of cereals to 76% and bean types 19% of
dry basis with productivity to 20 centner of hectare of
dry basis. At the same time the efficiency of the
improved phytocenosis was on charge exchange
energy of 17,3 mega joule of hectare, feed units 1032
and a crude protein of 247 kilo of hectare. The whetgrasses
phytocenosis has provided productivity to
19,4 centner of hectare and the content of perevarimy
protein in 1 feed unit up to 118 gram. So the most
effective for the steppe meadows is using complex
fertilizer (humus of 20 tons of hectare + N60P60K60),
increasing the productivity twice with a high quality of
food
The article presents the results of studies on the species composition of fungi isolated from seedlings of grapes affected by vascular necrosis
The article gives data on the importance of mikro-fundi in the Central part of the Caucasus, causing fungi of leaves and ear
Technological methods of rice cultivation in Rostov region are considered in the article. Broadcast sowing method with rolling down the soil, application of op-timum fertilizer doses before blossoming, water schedule for weed control are recommended. Low rice percentage crop rotation for farms with unsatisfactory financial position and minimum technical equipment are suggested