1. Magnesium in plants and soils;Bear;New Jersey Agr. Exp. Sta. Bul
2. Celery blackheart and its control in Pennsylvania;Bergman;Pennsylvania Agr. Exp. Sta. Progress Rept. 215,1960
3. A study of magnesium deficiency chlorosis in certain varieties of green celery;Burdine;Amer. Soc. Hort. Sci., Proc,1959
4. Effects of accumulated fertilizer nutrients in a Maine soil upon the yield, quality and nutrient content of potato plants;Carpenter;Maine Agr. Exp. Sta. Bull,1965
5. Factors influencing the mineral content of snapbeans, cabbage and sweet potatoes;Fleming;Arkansas Agr. Exp. Sta. Bull,1956