Micronutrients
Molybdenum
Symptoms similar to those of nitrogen deficiency in terms of chlorosis of leaves. Overall poor growth and development as seen through reduced growth of plants and roots as well as a decrease in bean production and their weight. Root nodules are small with pale yellow to greenish colour showing little activity.
Copper
Overall leaf appearance is poor. New leaves have necrotic areas at their tips which causes the leaflet ends to curl as the necrosis extends. The leaves take on a dehydrated appearance with discolouration ranging from bluish green to bronze green to olive green.
Iron
Effects are visible on new leaves in between veins, where the colour progresses from pale green to whitish in colour. Subsequently there is also discolouration of veins together with the development of necrotic spots characterized by brown borders
Boron
The overall development at the growing points is retarded which could cause their death. New leaves’ leaflets are abnormal, characterised by smaller sizes, deformities, wrinkled appearance and green-blue discolorations. Developmental processes such as flower development is severely decreased causing flower abortions.
Manganese
There is a gradual yellowish discolouration of newly formed leaves, specifically in between veins. The overall growth and development of the plant is not at optimal as seen through small leaves. As a result of increased nutrient deficiency necrotic areas with a brown appearance, develops.
Zinc
Abnormally shaped (pointed ends) new smaller leaves with evident areas showing chlorosis which may progress to grey or brown discolorations. Plants appear to have a decreased overall size as a results of shorter internodes. A less erect stem with decreased racenes production.
Macronutrients
Nitrogen
eaves to the bottom of the plant have an overall chlorotic appearance which when progressed may cause loss of these leaves. Newly developed leaves have less prominent green colouration as well as the plant having poor vegetative and root development.
Calcium
There is deterioration of terminal buds along with the possibility of petiole collapse. Wrinkled newly developed leaves with chlorosis that will progress from the edges to the centre.
Magnesium
The border and subsequently the centre of older leaves will show initial yellowing. As a result, these leaves will develop chlorotic areas in between the leave veins. The edges of leaves may appear dried out.
Phosphorus
Bluish dark green discoloration can be seen on older leaves that are markedly smaller. Chlorosis on the tips and towards the base of leaves can be seen. Stems have a purple discoloration at their bases and pod production is reduced.
Sulphur
Symptoms will initially be evident on newly developed leaves that have reduced sizes and chlorosis. Subsequently the leaves begin to yellow as if experiencing nitrogen deficiency.
Potassium
A yellow speckled chlorotic discoloration can be seen on the edges of leaves that will progress towards the centre of leaves. Subsequently necrotic spots develop on the edges of leaves and will progress to the centre.
Micronutrients
Molybdenum
Older leaves have chlorotic areas on their blades in between their veins. Untimely fall of off flowers and fruit.
Boron
Terminal leaves and buds can die off. Plant tissue is brittle in texture. Untimely fall of off flowers and fruit. A brown discoloration can be seen of fruits near their blossom.
Copper
The blades of new leaves are protruding much more in comparison to their veins. Older leaves have edges that curl upwards.
Manganese
New leaves have chlorosis and subsequent necrosis of their edges and tips.
Iron
Newly developed leaves have chlorotic areas in between veins. In severe iron deficient pants, the leaves can have and overall yellow appearance.
Zinc
Newly developed leaves are smaller with a thin yellowish appearance. Reduced flower development and production rate.
Macronutrients
Nitrogen
Overall retarded plant growth. The leaves towards the bottom of the plant have a green to yellow discoloration that will progress to leave dry up and death.
Sulphur
Depending on the intensity of the deficiency, newly developed leaves will either have a light green or yellow discoloration.
Potassium
Leaves to the bottom of the plant have chlorosis on their tips and edges that progresses to death of the chlorotic tissue.
Calcium
Fall of off flowers and smaller fruits. Blossom end rot of fruits occur.
Phosphorus
Older leaves have a purple discolouration to the bottom. Poor development cause stems to be thin.
Magnesium
Older leaves have chlorotic areas on their blades in between their veins.
Micronutrients
Molybdenum
This type of deficiency affects the plants ability to assimilate nitrogen. Leaves to the lower part of the plant may have a blotchy appearance.
Boron
This deficiency is most commonly associated with abnormally developed and deformed flowers. These flowers exhibit a high level of sterility which is linked to malformed grains.
Copper
Newly developed leaves have a pale green appearance. Leaves will twist up into a "spiral". Leaves with normal green colouration however have dead tips.
Manganese
The interveinal areas of new leaves show chlorosis which progress into grey brownish lesions.
Iron
Newly developed leaves have yellow chlorosis of the areas in between veins while ribs remain prominently green.
Zinc
Overall reduced development of plants characterised by smaller necrotic (interveinal) leaves that become evident when new leaves start to grow.
Macronutrients
Nitrogen
Older leaves have a pale green appearance. In terms of developmental effects, leaves have yellow discolourations in conjunction with necrosis at their tips.
Sulphur
Newly developed leaves have an overall light coloration to them. The overall growth of the plant is reduced.
Potassium
Older leaves are bronze in colour and dry out from their tip to base. The overall growth and development is reduced as seen through reduced leaf development.
Calcium
Newly developed leaves have a yellow discolouration that initially develops at the tips which will dry out and curl up. The yellow discolouration gradually spreads along the edge of leaves.
Phosphorus
Older leaves are bronze in colour and dry out from their tip to base. The overall growth and development is reduced as seen through reduced leaf development.
Magnesium
The overall colour of older leaves is green to yellowish together with yellow brownish spots.