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美国土壤学家史密卡和格勒布指出,小麦在每英亩产量平均为30—50或更多蒲式耳的情况下(约合每市亩269—446斤—译者),要达到13%或更高的蛋白质水平是可能的。蛋白质是麦粒的主要含蛋成分。因此,影响小麦植株氮素成分的土壤和气候因素能在籽粒的蛋白质含量上表现出差别。克密卡等利用48种试验材料研究了土壤和气候对小麦蛋白质含量的影响。他们分析了影响小麦蛋白质含量的两个积极因素和两个消极因素:
According to the American soilographers Schmitt and Graeb, the average yield of wheat per acre is 30-50 or more (about 269-446 pounds per acre), reaching 13% or Higher protein levels are possible. Protein is the main egg-containing ingredient in grains. Therefore, the soil and climatic factors that affect the nitrogen content of wheat plants show a difference in the protein content of the grain. Kumika et al. Studied the effects of soil and climate on the protein content of wheat using 48 experimental materials. They analyzed two positive and two negative factors that affect the protein content of wheat: