The yellow shoots of the new shoots growing late in the late period appear to be iron-deficient. The main reason is that the soil is highly alkaline, and iron in the soil cannot be absorbed by the roots.
Control methods:
1, spray iron fertilizer. Iron fertilizer is mainly ferrous sulfate. Before spraying, the concentration is about 1%. Spraying at the growth stage, the concentration is 0.30%-0.50%, and when the symptoms are serious, it can be sprayed several times.
2, buried bottle method. Early spring bottle best effect. When the tree has just sprouted, the ferrous sulfate solution with a concentration of 0.10%-0.30% is put in a washed bottle for use. Roots were excavated at 1 meter from the trunk, roots with a diameter of 5 mm were selected, and the roots were cut and inserted into a bottle containing a ferrous sulfate solution, which was then buried well with soil. Buried 4-6 bottles can be.
3, increase organic fertilizer. The humic colloids produced during the decomposition of organic matter can activate and adsorb available iron ions in the soil for absorption and utilization by the tree body.
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Laser distance measure is a very convenient tool for various types of applications in industries, construction and house decoration. Laser distance meter is a very useful device which gives accurate measurement of distance, area and volume especially in large areas such as rooms, apartments, buildings, real estates, factories, warehouses, infrastructures, gardens, roads, and many other applications requiring accurate results for distance , area and volume measurement.
Trade your heavy tape measure for laser
rangefinder, which let you simply take measurements with one hand. No matter
your job, the laser rangefinder will help you measure much farther, with
greater accuracy and in more situations, saving you money and time.
Specification:
|
Product Model: |
JX40 |
|
Accuracy: |
±1.5mm (0.06 inch) |
|
Measuring Unit: |
metre/inch/feet |
|
Measuring Range: |
0.03~40m (0.01 to 131 ft) |
|
Measuring Time: |
0.1~4 seconds |
|
Laser Class: |
Class II |
|
Laser Type: |
635nm, <1mW |
|
Waterproof & Dustproof : |
IP54 |
|
Auto Laser Off: |
60 seconds |
|
Automatic Power-off: |
480 seconds(8 minutes) |
|
Lighting: |
white LED |
|
Datum Option: |
Can choose Front edge or end piece edge as datum |
|
Battery Status: |
Y |
|
Signal Strength Display: |
Y |
|
LCD display: |
2 inch large screen |
|
Display illumination and multi-line display: |
Max 2 displays |
|
Data Memory: |
Y (allow 20 values) |
|
Backlight display: |
Y |
|
Continuous Measurement: |
Y |
|
Min/max Measurement: |
Y |
|
Addition/Subtraction(Distance/Area/Volume): |
Y |
|
Area/Volume/Pythagoras Measurement: |
Y |
|
Battery Type: |
AAA alkaline battery(2*1.5v ) |
|
Weight: |
about 80g |
|
Dimensions(L*W*H): |
4*2*11.5cm |
|
Auto correction and error report technology: |
Y |
|
Operating Temperature: |
0-40 ℃(32-104 ℉ ) |
|
Storage Temperature: |
-20~60 ℃ (-4~140 ℉) |
Laser Distance Meter,Laser Distance Measure,Laser Rangefinder,Laser Distance Gauge
Chengdu JRT Meter Technology Co., Ltd , https://www.infrareddistancesensor.com