Abstract:
A regression analysis method of one-place quadric was used in the paper, Farmland ecological efficiency and yield result of current staple varieties of spring wheat Yongliang No.4 in the Hetao irrigation areas were studied synthetically,when two kinds of sowing tools and various row shavings (10 cm and 15 cm) and various sowing norms were adopted.Then composite best model was established.Experiment result showed that the seedlings in the farmland sown with the seeder of sowing and fertilizing by layers grew better than that in the farmland sown with Weili driller.
Key words:
Spring wheats,
Farmland ecological efficiency,
Best model
Bai Dongcai, Li Zhicheng, Han Cheng, Yang Wenbi. Investigation on the Best Model of Spring Wheat Density and Its Farmland Ecological Efficiency[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(1): 33-39. doi: 10.3321/j.issn:1000-7091.1990.01.007.