Yellow spots on citrus leaves is due to the deficiency of: (1) Zinc (2) Magnesium (3) Boron (4) Iron

Yellow spots on citrus leaves is due to the deficiency of: (1) Zinc (2) Magnesium (3) Boron (4) Iron
by

1 Answer

Answer :

Magnesium
by

Related questions

In cabbage, cauliflower and broccoli, hollow stems with darkened interiors are most often caused by? (Agriculture MCQ) [a] Calcium deficiency [b] Chilling temperatures [c] Boron deficiency [d] Magnesium deficiency [e] Zinc deficiency

Description : In cabbage, cauliflower and broccoli, hollow stems with darkened interiors are most often caused by? (Agriculture MCQ) [a] Calcium deficiency [b] Chilling temperatures [c] Boron deficiency [d] Magnesium deficiency [e] Zinc deficiency

Last Answer : [c] Boron deficiency

Fruit cracking disease in Pomegranate is caused due to the deficiency of - a) Zinc b) Iron c) Boron d) Sulphar

Description : Fruit cracking disease in Pomegranate is caused due to the deficiency of - a) Zinc b) Iron c) Boron d) Sulphar

Last Answer : c) Boron

The main cause of leaf mottle disease in citrus is due to the deficiency of - a) Manganese b) Sulphar c) Zinc d) Iron

Description : The main cause of leaf mottle disease in citrus is due to the deficiency of - a) Manganese b) Sulphar c) Zinc d) Iron

Last Answer : c) Zinc

Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Last Answer : (c) phosphorus, potassium, sulphur, calcium

In which of the following all three are macronutrients? (a) Molybdenum, magnesium, manganese (b) Nitrogen, nickel, phosphorus (c) Boron, zinc, manganese (d) Iron, copper, molybdenum

Description : In which of the following all three are macronutrients? (a) Molybdenum, magnesium, manganese (b) Nitrogen, nickel, phosphorus (c) Boron, zinc, manganese (d) Iron, copper, molybdenum

Last Answer : (d) Iron, copper, molybdenum

In citrus plant, die back diseases is the result of deficiency of (a) N (b) P (c) Boron (d) Copper

Description : In citrus plant, die back diseases is the result of deficiency of (a) N (b) P (c) Boron (d) Copper

Last Answer : (d) Copper

Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Description : Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Last Answer : (c) Magnesium

Sunflower is also known as an individual plant for the deficiency of (A) Nitrogen (B) Zinc (C) Boron (D) Potash

Description : Sunflower is also known as an individual plant for the deficiency of (A) Nitrogen (B) Zinc (C) Boron (D) Potash

Last Answer : (A) Nitrogen

Whip tail disease of cauliflower is caused by deficiency of— (A) Nitrogen (B) Boron (C) Molybdenum (D) Zinc

Description : Whip tail disease of cauliflower is caused by deficiency of— (A) Nitrogen (B) Boron (C) Molybdenum (D) Zinc

Last Answer : (C) Molybdenum

Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis

Description : Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis

Last Answer : (c) (iii) (iv) (ii) (i)

Alkali soils are treated with gypsum to correct the deficiency of- (a) Sulphur (b) Calcium (c) Magnesium (d) Zinc

Description : Alkali soils are treated with gypsum to correct the deficiency of- (a) Sulphur (b) Calcium (c) Magnesium (d) Zinc

Last Answer : (b) Calcium

The deficiency of calcium and boron are found on — a. Old leaves b. New leaves c. Terminal leaves d. Old and new leaves

Description : The deficiency of calcium and boron are found on — a. Old leaves b. New leaves c. Terminal leaves d. Old and new leaves

Last Answer : c. Terminal leaves

Khaira disease in rice is due to the deficiency of (A) Boron (B) Mn (C)S (D) Zn

Description : Khaira disease in rice is due to the deficiency of (A) Boron (B) Mn (C)S (D) Zn

Last Answer : (D) Zn

Bloosom end rot of tomato is due to a. Infection/disease b. Boron/ Ca. deficiency c. Insect attack d. Nutritional deficiency

Description : Bloosom end rot of tomato is due to a. Infection/disease b. Boron/ Ca. deficiency c. Insect attack d. Nutritional deficiency

Last Answer : Boron/ Ca. deficiency

Mottle leaf of citrus is due to deficiency of

Description : Mottle leaf of citrus is due to deficiency of

Last Answer : Ans. Zinc

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield? (a) Application of iron and magnesium to promote synthesis of chlorophyll (b) Frequent irrigation of the crop (c) Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer (d) Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

Description : Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum ... yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

Last Answer : (a) Application of iron and magnesium to promote synthesis of chlorophyll

Brown spots in fabrics will be caused by washing with water containing large amount of: (A) Iron (B) Zinc (C) Iodine (D) Bromine

Description : Brown spots in fabrics will be caused by washing with water containing large amount of: (A) Iron (B) Zinc (C) Iodine (D) Bromine

Last Answer : (A) Iron

Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Description : Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Last Answer : Answer : C

Vitamin E reduces the requirement of (A) Iron (B) Zinc (C) Selenium (D) Magnesium

Description : Vitamin E reduces the requirement of (A) Iron (B) Zinc (C) Selenium (D) Magnesium

Last Answer : Answer : C

The substance coated on plastic tape recorder tapes is (a) zinc oxide (b) magnesium oxide (c) iron sulphate (d) iron oxide

Description : The substance coated on plastic tape recorder tapes is (a) zinc oxide (b) magnesium oxide (c) iron sulphate (d) iron oxide

Last Answer : Ans:(d)

Chlorophyll contains – (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Description : Chlorophyll contains – (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Last Answer : (2) Magnesium Explanation: Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.

The metal, which is a constituent of vitamin B12 is - (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Description : The metal, which is a constituent of vitamin B12 is - (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Last Answer : (4) Cobalt Explanation: Vitamin B12 is a "generic descriptor for compounds exhibiting the biologic activity of cyanocobalarnin: the antianemia factor of liver extract that contains cobalt, a cyano group ... lead to anemia, as well as nerve and brain damage, which may eventually become irreversible.

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : (1) Calcium and Magnesium Explanation: Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.

Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Description : Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Last Answer : (4) Iron Explanation: The definition of an amalgam is a mixture of metals and mercury, which can be man-made or can be naturally occurring.

Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc

Description : Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc

Last Answer : a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. b) ... acid than magnesium and zinc As iron has lowest reactivity when compare to magnesium and zinc.

The metal, which is a constituent of vitamin B12 is------? A. Iron B. Magnesium C. Zinc D. Cobalt (Answer)

Description : The metal, which is a constituent of vitamin B12 is------? A. Iron B. Magnesium C. Zinc D. Cobalt (Answer)

Last Answer : D. Cobalt (Answer)

Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Description : Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Last Answer : D) sodium > Magnesium > Zinc > Iron

Enzyme catalase has non-protein metal asA-magnesium B-manganese C-iron D-zinc

Description : Enzyme catalase has non-protein metal asA-magnesium B-manganese C-iron D-zinc

Last Answer : iron

Chlorophyll contains (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Description : Chlorophyll contains (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Last Answer : Magnesium

The metal, which is a constituent of vitamin B12 is (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Description : The metal, which is a constituent of vitamin B12 is (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Last Answer : Cobalt

The metal present in insulin is (1) Copper (2) Iron (3) Zinc (4) Magnesium

Description : The metal present in insulin is (1) Copper (2) Iron (3) Zinc (4) Magnesium

Last Answer : Zinc

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : Calcium and Magnesium

Plant micronutrient is – a) Carbon b) Boron c) Magnesium d) Sulphur

Description : Plant micronutrient is – a) Carbon b) Boron c) Magnesium d) Sulphur

Last Answer : b) Boron

Which of the following would have the largest THIR ionization energy? Is it: w) Boron x) Carbon y) Nitrogen z) Magnesium

Description : Which of the following would have the largest THIR ionization energy? Is it: w) Boron x) Carbon y) Nitrogen z) Magnesium

Last Answer : ANSWER: Z -- MAGNESIUM

Which element is involved in biosynthesis of IAA ? (A) Nitrogen (B) Boron (C) Zinc (D) Copper

Description : Which element is involved in biosynthesis of IAA ? (A) Nitrogen (B) Boron (C) Zinc (D) Copper

Last Answer : (C) Zinc

Which one of the following element is mobile in plants but immobile in soil ? (A) Sulphur (B) Zinc (C) Boron (D) Phosphorus

Description : Which one of the following element is mobile in plants but immobile in soil ? (A) Sulphur (B) Zinc (C) Boron (D) Phosphorus

Last Answer : (D) Phosphorus

What is the main function of zinc in the plants ? (A) Synthesis of nitrogen (B) Synthesis of phosphorus (C) Required for synthesis of Tryptophos (D) To increase activity of the boron

Description : What is the main function of zinc in the plants ? (A) Synthesis of nitrogen (B) Synthesis of phosphorus (C) Required for synthesis of Tryptophos (D) To increase activity of the boron

Last Answer : (C) Required for synthesis of Tryptophos

Which one of the following is essential for photolysis of water? (a) Manganese (b) Zinc (c) Copper (d) Boron

Description : Which one of the following is essential for photolysis of water? (a) Manganese (b) Zinc (c) Copper (d) Boron

Last Answer : (a) Manganese

The main component of Pyrex glass is (A) Zinc (B) Lead (C) Boron (D) Selenium

Description : The main component of Pyrex glass is (A) Zinc (B) Lead (C) Boron (D) Selenium

Last Answer : (B) Lead

Cardiac arrest may occur due to over doses of (A) Sodium (B) Potassium (C) Zinc (D) Magnesium

Description : Cardiac arrest may occur due to over doses of (A) Sodium (B) Potassium (C) Zinc (D) Magnesium

Last Answer : Answer : B

Psychotic symptoms and parkinsonism like symptoms develop due to inhalation poisoning of (A) Manganese (B) Phosphorous (C) Magnesium (D) Zinc

Description : Psychotic symptoms and parkinsonism like symptoms develop due to inhalation poisoning of (A) Manganese (B) Phosphorous (C) Magnesium (D) Zinc

Last Answer : Answer : A

Yellow leaf of citrus is due to def of ? a Mo b Zn c Mn d N

Description : Yellow leaf of citrus is due to def of ? a Mo b Zn c Mn d N

Last Answer : a Mo

What are the deficiency symptoms of Boron in plants? -Biology

Description : What are the deficiency symptoms of Boron in plants? -Biology

Last Answer : answer:

The water core disease of apples is caused by (a) boron deficiency (b) bacterial infection (c) fungal infection (d) high temperatures

Description : The water core disease of apples is caused by (a) boron deficiency (b) bacterial infection (c) fungal infection (d) high temperatures

Last Answer : Ans:(d)

Zinc deficiency is sweet orange causes a. Chlorosis in fruit b. Chlorosis in leaves c. Streaks on leaves d. sweetness of fruit.

Description : Zinc deficiency is sweet orange causes a. Chlorosis in fruit b. Chlorosis in leaves c. Streaks on leaves d. sweetness of fruit.

Last Answer : Chlorosis in leaves

Hypogonadism develops due to deficiency of (A) Sulphur (B) Cobalt (C) Zinc (D) Manganese

Description : Hypogonadism develops due to deficiency of (A) Sulphur (B) Cobalt (C) Zinc (D) Manganese

Last Answer : Answer : C

The khaira disease of rice is caused due to deficiency of which of the following? [a] Zinc [b] Nickel [c] Nitrogen [d] Sulphur [e] None of the above

Description : The khaira disease of rice is caused due to deficiency of which of the following? [a] Zinc [b] Nickel [c] Nitrogen [d] Sulphur [e] None of the above

Last Answer : [d] Sulphur

Leaf drop disease in peach is caused due to the deficiency of - a) Ammonium b) Calcium c) Potassium d) Zinc

Description : Leaf drop disease in peach is caused due to the deficiency of - a) Ammonium b) Calcium c) Potassium d) Zinc

Last Answer : b) Calcium

my bartlette pear trees leaves are turning yellow early with brown spots and some pears look like they are dying early?

Description : my bartlette pear trees leaves are turning yellow early with brown spots and some pears look like they are dying early?

Last Answer : Need Answer

my pumpkins are dying when they are small and leaves are yellow with brown spots

Description : my pumpkins are dying when they are small and leaves are yellow with brown spots

Last Answer : PH should be 5.5-7.5...............carefully put some composted horsemanure around where the roots are in the ground right before the next rain. Next year prepare the soil with ... wait until spring and cover with newspapers after planting and then put old grass on top to hold the moisture.