The production of 1,000 kg of spinach requires 1.6 kg of pure nitrogen, 0.83 kg of phosphorus pentoxide, and 1.8 kg of potassium oxide. Before planting, 5000 kg of high-quality organic fertilizer and 40 kg of phosphate fertilizer were used as base fertilizer. Before wintering, about 10 cm high spinach seedlings, according to growth conditions topdressing overwintering fertilizer, should be 10 to 15 kg of nitrogen fertilizer, phosphate fertilizer 10 to 15 kg. Be sure to pour frozen water once before winter to prevent death in winter. In the spring of next year, fertilizer should be applied in time. Nitrogen fertilizer should be applied to 20-25 kilograms, and phosphorus and potassium fertilizer should be 15-20 kilograms every 10 to 20 days. Spinach dressing should not be spread in the heart of the fertilizer, so as not to cause burning seedlings, each top dressing should be combined with watering. 0.3% foliar fertilizer can also be used for foliar spray.
40m Laser Distance Meter is a functional and advanced measuring tools, no need climbing up and down, which is the engineers' best friends. No matter you have your own brand or not, JRT can help you to start with laser range finder business. JRT sold more than 1 million OEM laser distance meter modules last year, and we will triple or fifth times of that quantity.
We accept OEM/ODM and customized product.
>1. Logo printed customized: at the back of the instruments etc.
>2. Distance customized: 40m, 60m, 100m, 150m.
>3. Package box customized
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Chengdu JRT Meter Technology Co., Ltd , http://www.rangingsensor.com