
Author: Ismatilla Irnazarov, Rohila Khasanova Zikriyayevna
Abstract:
Based on the results of field experiments in 2015-2017 on winter soft wheat varieties, the yield error was 0.64-0.98 kg / ha (НСР05 factor A), and the yield error on application of the urea norm was 0.45- 0.69 kg / ha (HCP05 factor B), which allows us to consider the conducted research reliable.
The result determined by mathematical analysis according to the method of B. A. Dospekhov [4], the minimum difference was up to 0.98 kg / ha, which allows the introduction of large-scale practical farming with urea solutions physical 40 kg / ha per 300 l / ha of water in the beginning phase embryonic development of varieties of winter soft wheat Yaksart and Gazgan through the leaves.

Author: Sotipov G.M., Gandjaeva L.A.
Abstract:
Winter Wheat is an important cereal crop for the population of Uzbekistan. The objective was to study the effect of different sowing dates, irrigation regime and various levels of fertilization on the growth and development of Asr cultivar of winter wheat. The experiment was conducted on the field №119 of the Dildora-Bojimon farm of Yangibazar district of the Khorezm region during 2014-2016. Statistical analysis of the data showed that different sowing dates, irrigation regime and fertilization levels had a significantly affected on plant height (cm), number of total tillers and number of
productive tillers m-2 of winter wheat.

Author: Gandjaeva L.A.
Abstract:
To evaluate the growth and development of winter wheat under 3 factors (sowing dates, irrigation regimes and rate of fertilization) in Khorezm region,
there was done an experiment using a winter wheat (Triticum aestivum L.) cultivar Kuma. For the experiment we used three sowing dates: D1=1st of
October, D2=10th of October, D3= 20th of October, 2 irrigation treatments, including 60-65-60, 65-70-60 and 2 fertilizaton treatments: the following doses of N150P100K75 kg ha-1 and N200P140K100 kg ha-1 , was conducted in the field №119 of the Dildora-Bojimon farm of Yangibazar district of the Khorezm region during the 2014–2016 growing seasons.

Author: Gandjaeva L.A.
Abstract:
The aim of our research is based on the study of the effect of different sowing dates on biometric parameters of Grom cultivar of winter wheat. The experiment was conducted on the field №119 of the Dildora-Bojimon farm of Yangibazar district of the Khorezm region during 2013-2014. Statistical analysis of the data showed that different sowing dates had a significantly affected on plant height (cm), number of total tillers and number of productive tillers m-2 of winter wheat.