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June 19, 2017
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Fertilizer Testing

Fertilizer analysis is important in order to detect the different radicals
present in the fertilizer. It helps in the faster growth of the plants. Fertilizers
also supply nutrients for the plants. These nutrients which are supplied to the
plants should be in correct amount for the plants to grow better. Thus, fertilizer
analysis helps in identification of the quantity of the nutrients present in the
fertilizers.

Why is fertilizer test necessary?

The fertilizer contains all the nutrients which cannot be obtained
naturally by plants. If any of the macronutrients are missing or hard to obtain
from the soil, this will limit the growth rate for the plant. By testing the
fertilizers, it is easy to know the nutrients present in the fertilizers.

Types of fertilizers:


There are two types of fertilizers that require testing. They are

  • Organic Fertilizers
  • Inorganic Fertilizers

Organic fertilizers are fertilizers derived from animal or vegetable matter.
Processed organic fertilizers include compost, bone meal, humic acid, amino
acids, and seaweed extracts. Other examples are natural enzyme-digested
proteins, fish meal, and feather meal.

Inorganic fertilizers or Mineral fertilizers need to be applied to crop at least
two times within a growing season (split application), either basally at planting
or top-dressed during vegetative growth. The amount of inorganic fertilizer
used in most smallholder farming systems falls far below standard extension
recommendations, due to poor purchasing power, risk aversion due to poor and
unreliable rainfall, and lack of significant returns.

Parameters:


The parameters that are necessary for the fertilizer analysis are

Macronutrients –

Appearance, pH, EC, Nitrogen, Potassium,
Phosphorous, Calcium, Magnesium, Sulphur

Micronutrients

– Copper, Iron, Zinc, Manganese, Boron.


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