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4 colors for leaf colors comparation

Comparative Leaf Colors Key Ring FJ-901

Leaf colors comparative key ring for rice or other crops Nitrogen content test

Description

4 green sheets from No. 2 to No. 4 to compare the leaf color to judge the Nitrogen content of leaf. Depend on the judgement to determinate how to adjust the nutrient or fertilization. The 4 sheets link together as a key ring makes it easy to carry.
The relation between leaf color and nitrogen fertilizer
The color of crop leaves and nitrogen fertilizer amount are closely related.
Nitrogen fertilizer is low, leaves become yellow green. Conversely, when nitrogen fertilizer is high, the leaves become dark green.
In practice, we can refer IRRI (International Rice Research Institute) to compare the leaves color with the Leaf color plates.
This is a simple assistant tool you can objectively compare the colors to aid identification of leaf color shades.
Leaf color plates simulate different shades of leaf color. Leaf color plates from yellow to dark green is divided into four different grades, these grades are specify the value as 2,3,4,5.
Color value from 2 to 5, leaf nitrogen content increased, also shows the amount of leaf nutrient supply within the gradual accumulation.
Use of leaf color plates to compare leaf color, you can then judged the nutritional status of the plant.
How to use Leaf Color Plates
1. In rice tillering and panicle initiation stage, which is the second top-dressing and ear manuring ago, in the rice fields selected at random 10 or more, not infected rice plants inaba.
2. Per plant rice inaba, to select the top, has been fully expanded leaves. View the middle part to match leaf color plates.
3. At the outdoors shade where the sun does not shine directly, let the front of leaf toward you for leaf identification. Identify the value compared to leaf color plates (different color density value from 2 to 5). Do not directly observe both under the sun, so as to avoid light reflection and affect the accuracy of identification of leaves.
4. Record 10 leaves value (if the color is located between 2 value and difficult to determine, you can use decimals), calculated the average value of 10 leaves. You can understand the overall nutritional status of this area, to determine how to fertilize.
5. Color identification should consider the ambient light intensity avoid direct sunlight or artificial lighting for identification, so as to avoid errors.
The interpretation of the average rice leaves color and Fertilization
Note: The value of rice leaf color rendering due to cultivar, growth stage and cultivation environments differ.
A. In case of japonica leaf color in the late stages average 3.5 ( leaf color darker than the value 3, but not dark as value 4 ) , leaf color is normal , showing rice plants nourished , according the usual amount of fertilizer applied .
B. When the average leaf color is in value 3, means slightly less nutritious rice plants. Can be increased the amount of nitrogen than usual, in order to promote rice growth.
C. When the average leaf color below value 3 (namely leaf color yellow than value 3), the rice plants is malnutrition, immediately increased fertilizer to add nutrients to promote normal growth of rice.
D. When the average leaf color is value 4, it means the plant nitrogen content slightly higher than the suitable dosage. We should reduced proportion of nitrogen. The varieties which easy lodging, should be more reduced nitrogen, or even no nitrogen fertilizer to prevent leggy rice plants, causing lodging.
E. When the average leaf color is value 5 (the darkest green), the rice plants have excess nutrients, it is recommended not to fertilization. Avoid plants lodging or induced pests that seriously affect grain yield and grain quality.

Other crops if you want to use these leaf plates, on the interpretation to the grade of average leaves color, as well as fertilization measures. We must to pay attention to the difference with rice. Crop types, growth stages and different culture environment will cause differences.
Moreover, sampling timing, the sample selection, the position of the leaf to identify, according to different crops, necessary adjustments are very important.
Of course, to avoid causing errors, precautions, identify and compare methods must surely according to standard procedures.
Leaf plate is to provide a fixed color, avoid memory errors. But the interpretation must to depend on the correct knowledge of different crop characteristics.
View More Details
Features
The 4 leaf color sheets link together as a key ring makes it easy to carry.
The relation between leaf color and nitrogen fertilizer
The color of crop leaves and nitrogen fertilizer amount are closely related.
Nitrogen fertilizer is low, leaves become yellow green. Conversely, when nitrogen fertilizer is high, the leaves become dark green.
In practice, we can refer IRRI (International Rice Research Institute) to compare the leaves color with the Leaf color plates.
This is a simple assistant tool you can objectively compare the colors to aid identification of leaf color shades.
Leaf color plates simulate different shades of leaf color. Leaf color plates from yellow to dark green is divided into four different grades, these grades are specify the value as 2,3,4,5.
Color value from 2 to 5, leaf nitrogen content increased, also shows the amount of leaf nutrient supply within the gradual accumulation.
Use of leaf color plates to compare leaf color, you can then judged the nutritional status of the plant.
How to use Leaf Color Plates
1. In rice tillering and panicle initiation stage, which is the second top-dressing and ear manuring ago, in the rice fields selected at random 10 or more, not infected rice plants inaba.
2. Per plant rice inaba, to select the top, has been fully expanded leaves. View the middle part to match leaf color plates.
3. At the outdoors shade where the sun does not shine directly, let the front of leaf toward you for leaf identification. Identify the value compared to leaf color plates (different color density value from 2 to 5). Do not directly observe both under the sun, so as to avoid light reflection and affect the accuracy of identification of leaves.
4. Record 10 leaves value (if the color is located between 2 value and difficult to determine, you can use decimals), calculated the average value of 10 leaves. You can understand the overall nutritional status of this area, to determine how to fertilize.
5. Color identification should consider the ambient light intensity avoid direct sunlight or artificial lighting for identification, so as to avoid errors.
The interpretation of the average rice leaves color and Fertilization
Note: The value of rice leaf color rendering due to cultivar, growth stage and cultivation environments differ.
A. In case of japonica leaf color in the late stages average 3.5 ( leaf color darker than the value 3, but not dark as value 4 ) , leaf color is normal , showing rice plants nourished , according the usual amount of fertilizer applied .
B. When the average leaf color is in value 3, means slightly less nutritious rice plants. Can be increased the amount of nitrogen than usual, in order to promote rice growth.
C. When the average leaf color below value 3 (namely leaf color yellow than value 3), the rice plants is malnutrition, immediately increased fertilizer to add nutrients to promote normal growth of rice.
D. When the average leaf color is value 4, it means the plant nitrogen content slightly higher than the suitable dosage. We should reduced proportion of nitrogen. The varieties which easy lodging, should be more reduced nitrogen, or even no nitrogen fertilizer to prevent leggy rice plants, causing lodging.
E. When the average leaf color is value 5 (the darkest green), the rice plants have excess nutrients, it is recommended not to fertilization. Avoid plants lodging or induced pests that seriously affect grain yield and grain quality.

Other crops if you want to use these leaf plates, on the interpretation to the grade of average leaves color, as well as fertilization measures. We must to pay attention to the difference with rice. Crop types, growth stages and different culture environment will cause differences.
Moreover, sampling timing, the sample selection, the position of the leaf to identify, according to different crops, necessary adjustments are very important.
Of course, to avoid causing errors, precautions, identify and compare methods must surely according to standard procedures.
Leaf plate is to provide a fixed color, avoid memory errors. But the interpretation must to depend on the correct knowledge of different crop characteristics.
Specification
Green color No. 2 to 4
Safety/Quality Approvals
ISO9001:2015
Other 1
An Jarl enterprise co., ltd. is a manufacturer of various items for farm irrigation & lots of kinds of farm equipment for over 40 years in TAIWAN.

Our product series including sprinkler hose (rain pipe, rain tape, micro spray tube) irrigation system, mulch film, accessories for agriculture, horticulture, greenhouse, net house, irrigation sprinklers, micro irrigation sprinklers, field irrigation implements, cooling & moisture system, flat garden hose, seep soaker hose, flexible pipe, seedling trays, insecticide fog sprayer, fog nozzles, agriculture net, tunnel small greenhouse, Venturi fertilizer injector, T fitting & other fittings for irrigation systems … etc.

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Besides producing our own products, we also pleased acting as an ODM & OBM factory. Actually, we manufacture many products for big brands in Taiwan and other countries.

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Other 2
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Also hope in the process of agriculture renewed, we can contribute our effort to make farming close nature and in harmony with the earth.
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