Slow & Controlled Release Fertilizer

The release mechanism of CRF

img-row-1
1
Structure of
CRF



2
Soil water penetrates into the granule through the CRF coating pores



3
The solid nutrients inside are gradually dissolved into easily absorbed liquid form



4
The liquid nutrients are released into the soil slowly and continuously

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The release rate depends on the soil temperature. The higher soil temperature, the faster the nutrient releases. The soil moisture, Ph and the activities of soil microorganisms have little impact on the fertilizer nutrient release. Our Controlled Release Fertilizers Include PCU and CRF; PSCU is polymer sulfur coated urea, and it is slow release fertilizer, PCU is polymer coated urea, and PCF is controlled release NPK coated in one granular.


Polymer and sulfur
coated urea (PSCU)

Urea granules are coated with 1% polymer and another coat of sulfur. Polymer coating makes the SCU coat more flexible and durable.



polymer coated
fertilizer (PCF) 

Granules of compound NPK are coated with polymer to achieve gradual release of the nutrients, using advanced granule-coating techniques.



polymer coated
urea (PCU) 

Urea granules are coated with a biodegradable polymer, using advanced membrane coating technology which enables the slow release to increase fertilizer utilization rate.


Product features

Increase both yield and income Matches crop nutrient demand during the whole growth season. It can increase yield by 10%-40%.
High efficiency in saving fertilizer Reduces nutrient loss and improves use efficiency of fertilizers by more than 30%.
Time and labor saving Reduces application times and dosage, helps avoiding access absorption of nitrogen by crops, which plays an important role in suppressing disease to the crops and improving crop quality.
Eco-environment Reduces pollution by leaching into soil, ground water and air caused by fetilizer loss.


Longevity of SCRF under various soil temperature

Standard Longevity

15℃

20℃

25℃

30℃

3 months

5 months

4 months

3 months

2 months

6 months

9 months

7-8 months

6 months

4-5 months

9 months

11 months

9-10 months

9 months

7-8 months

 

Product series

Product

2-3 months

3-4 months

  5-6 months

9-12 months

PSCU

  35-0-0

35-0-0

 –  –

PCU

  44-0-0

43-0-0

  42-0-0

41-0-0

PCF

14-14-14

14-14-14

14-14-14

14-14-14

PCF

12-0-43

12-0-43

12-0-43

11-0-42

PCF

16-44-0

16-43-0

16-43-0

15-42-0

PCF

20-8-10

20-8-10

19-7-9

19-7-9

 

Application recommendations

The following formulation s contain 20-50% controlled release N or K

Crop

Application period

Nutrients ratio

Formulation

Dosage (kg/ha)

Application Method

Corn

Base fertilizer

High N

Summer corn

30-4-6

28-5-9

26-8-6

Spring corn

26-11-11

600-750

Furrow or hole fertilization

Wheat

Base fertilizer

High N and P

25-12-8

24-12-6

525-750

Broadcast or furrow fertilization

Rice

Base fertilizer

High N and Medium P and K

21-10-11

22-8-15

23-11-12

16-8-16

600-750

broadcast

Cotton

Base fertilizer

High N and K

22-8-15

23-11-12

450-600

Furrow or hole fertilization

Fruit tree

Fertilization after picking

Balanced or High N and K

21-10-11

18-8-16

22-8-12

20-6-19

0.5-2kg/plant

Furrow fertilization

Note: The above mentioned specifications are for reference only, the actual application should be based on soil conditions.