How the iron blade is fixed into a wooden handle in tolls used to dig the soil?

How are microbial innoculants used to increase the soil fertility?

How are microbial innoculants used to increase the soil fertility?

Assertion (A) : EDTA rectify the iron deficiency in plants growing in alkaline soil. Reason (R ) : Have to make iron a soluble complex by addding a chelating agent like EDTA (Ethylene Diamine Tetra Acetic acid to form Fe-EDTA ) and its used to rectify iron deficiency.

(Diet problem): A dietician has to develop a special diet using two foods P and Q. Each packet (containing 30 g) of food P contains 12 units oif calcium, 4 units iof iron, 6 units of cholesteroa and 6 units of vitamiin A. Each packet of the same quantity of food Q contains 3 units of calcium, 20 units of iron, 4 units of cholesterol and 3 units of vitamin A. The diet requires atleast 240 units of calcium, atleast 460 units of iron and at most 300 units of cholestero. How many packets of each food should be used to minimise the maount of vitamin A in the diet? What is the minimum amount of vitamin A?

A dietician has to develop a special diet us ing two foods P and Q. Each packet (containing 30g) of food P contains 12 units of calcium, 4 units of iron, 6 units of cholesterol and 6 units of vitamin A. Each packet of the same quantity of food Q contains 3 units of calcium, 20 units of iron, 4 units of cholesterol and 3 units of vitamin A. The diet requires atleast 240 units of calcium, atleast 460 units of iron and almost 300 units of cholesterol. How many packets of each food should be used to maximise the amount of vitamin A in the diet? What is the maximum amount of vitamin A in the diet?

Ganesh is a champion in cricket in his school. When he is in the ground (for practice) and he used to whirl his bat in different style. His coach was Mr. Gunalan. The coach asked Ganesh to hold the bat at its handle and roatate fastly. But Ganesh could not do as his coach said, Ganesh developed pain in his hands. Then his coach told him to rotate the bat by holding it at its mid point. When Ganesh rotated at this position, he was able to rotate the bat faster. Ganesh was surprised and asked his coach how. (i) What was coach's explanation to Ganesh ? (ii) What is Radius of Gyration ? Give an example. (iii) How moment of Inertia is related with Angular velocity ?

a. What happens if a bar magnet is cut into two pieces : (i) transverse to its length , (ii) along its length ? b. A magnetised needle in a uniform magnetic field experiences a torque but no net force . An iron nail near a bar magnet , however , experiences a force of attraction in addition to a torque . Why ? c. Must every magnetic configuration have a north pole and a south pole ? What about the field due to a toroid ? d. Two identical looking iron bars A and B are given , one of which is definitely known to be magnetised. (We do not know which one ) . How would one ascertain whether or not both are magnetised ? If only one is magnetised , how does one ascertain which one ? [Use nothing else but the bars A and B ]

Your are provided with iron filings and a bar magnet withour labelling the poles of the magnet.Using this____ : How will you identify the poles of tghe magnet?

Assertion (A) : Iron toxicity is excess usage of chelated iron addition with increased acidity of soil. Reason (R ) : Iron toxicity will affect absorption of manganese. Iron and manganese toxicity will be solved by using fertilizer with balanced ratio of Fe and Mn.