Water and fertilizer management technology for anti-season watermelon
The suitable soil moisture of watermelon is 65%-78% of the maximum water holding capacity in the field , and the drought is like the soil moisture below 48% . The requirement of soil moisture in watermelon is high germination period, less seedling period, moderate amount of vines, and the middle stage is the peak period of water demand. It should be fully irrigated, and in the later stage, irrigation should be reduced. Â The fertilization of watermelon should be based on the application of the base fertilizer, and the topdressing should be carried out. In the fruit expansion period , 3 kg of potassium sulfate and 30 kg of diammonium per acre are applied . Before and after the setting of the melon, it is possible to spray a mixture of 0.2% urea and 0.2% potassium dihydrogen phosphate on the foliar surface . Observe whether the watermelon is lack of fertilizer, depending on the color of the leaves, if the base leaves are dark green, the middle leaves are green, and the top leaves are light green, indicating normal growth; if the whole plant is yellow-green from top to bottom, it indicates lack of fertilizer; if the leaves are plant From top to bottom, it is dark green, indicating that there is too much nitrogen fertilizer, it will take a long time, and it needs to be controlled. Bilateral Laser Distance Meter
A double side laser measure is designed for convenient and efficient measurement works. The easy-to-read digital screen displays the battery life, so you won`t be left without your measuring tool each time it is needed. You can bring it everywhere with you, and the smart functions that comes along with it is user-friendly for anyone, including beginners in DIY. It is the ideal multifunctional measuring tool that suit all users including home renovators, architects, interior designers, construction workers, or even DIY lovers.
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The bilateral laser measurer is a powerful, dual direction laser measuring tool that makes measuring building and rooms a simple task.
The two lasers allow you to stand in the center of a room find the distance between walls (even if the room is fully furnished) and between the floor and ceiling.
When using the bi-directional lasers, the device can be placed in Continuous Measuring Mode to help you find the center point of a wall or room. Interior designers will love how simple it is to perfectly mount paintings and decor in the center of a wall. This mode is also perfect for real estate agents who want to provide accurate measurements to homebuyers, without wrinkling their suit.
Perfectly measure for new blinds by finding the exact size of the window casings.
The single direction laser option measures from the opposite end of the device, allowing you to lay the device flush with walls for accuracy.
The device can display measurements in meters, feet, and tenths, or feet and inches, to give you the details you need to complete your task.