Effects of combined application of copper and nitrogen on grain yield and protein in winter wheat;

Effect of nitrogen application rate on nitrogen absorption,NO_3-N accumulation in soil and grain yield of winter wheat;

Effects of fertilizing on physiological characteristics and grain yield of winter wheat cultivars;

The effects of nitrogen application operation on physiology and yield of wheat in Karst mountainous areas;

To determine the influence of agronomic characters on grain yield of summer maize in eastern Hebei province,the correlation between the grain yields of 22 varieties of summer maize and 9 agronomic characters were analyzed by the method of gray correlation degree analysis.

The influence of sulfur application on characteristics of grain filling and yield of winter wheat cultivar Yumai 50 was investigated under high nitrogen fertilizer level(330 kg/hm2) with soil available sulphur content of 22.

Domestication and cultivation of Orychophragmus violaceus: Ⅱ. Effects of cultivation methods on seed yield;

The affect of latitude on the vegetative growth and seed yield of sweet sorghum;

The techniques of simple correlation analysis and gradual regression were used in this paper to analyse the relationship between quantitative characters related to seed production of Bromus ciliatus and its seed yield in a single head.

Analysis of genetics of four kernel traits in maize(Zea mays L.);

Dry matter,fructan and nitrogen accumulation and partitioning and their relationships with grain yield (GY),grain nitrogen yield (GNY) and grain nitrogen concentration (GNC) were studied in seventeen Australia wheat genotypes (Triticum,aestivum L.