Mineral nutrition of vegetable crops. LXIX. Malnutrition symptoms of macronutrients and boron in mustard

Abstract

Mustard plants (Brassica juncca) 'Lisa' were cultivated in pots containing fine crushed quartz. The plants were irrigated several times a day with several nutrient solutions. The treatments were: all nutrients, -N, -P, -K, -Ca, -Mg, -S, -B. Once the plants sowed a clear picture of malnutrition their were harvested and analyse for the elements. The authors concluded: - the omission of the nutrients affected with severity the growth of the plants; - the malnutrition symptoms were easy identificated for all elements; - the normal and abnormal leaves presented the following concentrations: N% 3.68-3.44; P% 0.60-0.50; K% 4.97-1.03; Ca% 2.40-0.46; Mg% 1.00-0.06; S% 0.31-0.13 B ppm 85-23.