6Majumdar S P, Meena R L, Baghel G D S. Effect of levels of compaction and potassium on yield and quality of tomato and chilli crops grown on highly permeable soils [ J ] . Journal of the Indian Society of Soil Science, 2000, 48(2): 215-220.
7Balliu A, Ibro V. Influence of different levels of potassium fertilizers on growth, yield and ascorbic acid content of tomato fruit grown in nonheated greenhouze[J]. Acta Horticulturae, 2002, 579: 385-388.
