Tomato is the most widely cultivated crop in the world and considered a very important vegetable crop regarding both income and nutrition. Tomato is the second most important vegetable crop next to potato. Tomato is a rapidly growing crop with a growing period of 90 to 150 days and can be grown on a wide range of soils but a well-drained, light loam soil with a pH of 5 to 7 is preferred. The crop is very sensitive to frost.
Tomato crop is an important economic crop, which depletes large quantities of potassium, especially during the stages of growth and development of fruits, potassium is one of the most important nutrient in production and quality of tomato fruits because of its direct impact on: -
The effect of phosphorus on the yield of tomato crop because phosphorus play physiological roles as: -
Calcium plays many physiological roles in the tomato crop
Potassium deficiency symptoms on tomato can be appeared as slow in growth and that before visible symptoms occurred. symptoms appear on the edges of the leaves and from bottom to top as a yellow or bronzes spots in addition , old lower leafelets below the leaves may bend as shown symptoms of shortage in: -
The most important of phosphorus deficiency symptoms element on tomatoes turn the leaves to bluish green and then red or purple for the accumulation of sugar in the leaves. The symptoms of deficiency appear in: -
Symptoms of deficiency appear as: