nitrogen management
2.Stepwise regression indicated that root density,root total absorption area and nitrogen content in shoots at the jointing stage were the main characters of high efficient nitrogen absorption of rice and could be regarded as reliable indicators for efficient nitrogen management and genetic improvement of rice.
4.The population physiological characteristics of both small spike-type cultivar (yumai 49) and large spike-type cultivar (yumai 66) were studied under field conditions, and the regulating effects of nitrogen and irrigation management were investigated as well.
5.Eng.) We teach soil definition, soil classification, soil architecture and physical properties, soil aeration and temperature, soil colloids, soil acid, alkalinity and salinity, soil organisms, soil organic matter, nitrogen and sulfur economy of soils, soil phosphorus, potassium and micronutrients, practical nutrient management.
6.The plantlets of Musa AAA Cavendish cv.Baxi were cultivated in off-season in Danzhou district of Hainan Province. The results showed that under the different ratios of nitrogen to phosphorus to potassium with 1.00:0.17:2.09 and conventional management,the average total leaves was 28.74,the peak of leaf growth was in the 2nd month after planting;
