Practice Test 4
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The biological method for determining deficiency of lime, P and K is

Aspregillus niger test is used for

The basic slag is

Single super phosphate is

  • Solution

    SSP It was the first commercial mineral fertilizer and it led to the development of the modern plant nutrient industry. This material was once the most commonly used fertilizer, but other phosphorus (P) fertilizers have largely replaced SSP because
    of its relatively low P content.

    Phosphorus content 7-9% (16 to 20% P2O5)

    Calcium (Ca) = 18 to 21%

    S content = 11 to 12%

    pH = ≤ 2

The availability of P2O5 is maximum at

The maximum fixation of K-occurs

Which of the following condition is suitable for de-nitrification?

  • Solution

    Denitrification It is a microbially facrobially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products.

In which group urea belongs to

Which of the following nutrient absorbed both positive and negative forms?

Nitrogen loss form urea application in paddy field is known as

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Manures and Fertilizers
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