I have some questions so please help me How Nickel deficienc

I have some questions, so please help me

How Nickel deficiency is measured?

Symptoms of Nickel deficiency?

Why Nickel may be Low in Natural or Managed Growing Environments?

Could you write the answers by handwriting clearly.

Thank you

Solution

Ans.) Nickel is a part of several plant enzymes, most importantly urease. Urease metabolizes the nitrogen component of urea into a ammonia which consequently used within the plant. Nickel is a mobile element.

In some cases, nickel deficiency is due to the extreme use of rival ions, such as Zn and Cu, adverse conditions like high pH or by the use of oxidized soils for crop production. There are several soil test methods which have been applied for determining the crop\'s need for Ni fertilizer. Many extract have been applied to measure the soil\'s concentration of exchangeable Ni which includes diethyltriaminepentaacetic acid, BaCl2, Sr(NO3)2 and ammonium acetate. But there is no exact method to measure the nickel deficiency in plants. It can be measured by measuring the concentration of ammonia.

Nickel deficiency is commonly found in plants. Its symptoms typically appear in the older leaves of the plants as it causes necrosis. In leguminous plant, it shows complete leaf chlorosis along with necrotic leaf tips (caused due to the accumulation of excessive urea). In woody plants, it causes shortened internodes; weak shoot growth, complete loss of terminal buds and eventually causes death of shoots and its branches.