1. Adams F and Lund Z F 1966 Effect of chemical activity of soil solution aluminum on cotton root penetration of acid subsoils. Soil Sci. 101, 193–198.
2. Adams F and Moore L B 1983 Chemical factors affecting root growth in subsoil horizons of coastal plain soils. Soil Sci. Soc. Am. J 47, 99–102.
3. Bataglia O C, Furlani A M C, Teixeira J P, Furlani P R and Gallo J R 1983 Methods of chemical analysis of plants. 48 p. Bulletin 78 (In Portuguese).
4. Blarney F P C and Nathason K 1975 Molybdenum nutrition of maize (Zea mays L.) on an Avalon medium sandy loam as affected by molybdenum, lime and phosphate applications. Agrochemo-phisica 7, 33–37.
5. Camargo A P, Raij B van, Cantarella H, Rocha T R, Nagai V and Mascarenhas H A A 1982 Effect of liming on yields of five successive crops of maize followed by cotton and soybeans. Pesq. Agrop. bras. 17, 1007–1012. (In Portuguese).