In this category, you will find wide assortments of Glass ware used in Lab. Beaker, measuring cylinder, flask, test tube, petri dish, centrifuge tube, evaporating dish, dryer, reagent bottle and ect., you will have a good choice with various size.
Combined with glass ware, you also can find related electric devices like Distilling Apparatus, Water Bath, Digital Oil Bath in the category of Lab Eletronic machines.
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How to determine the amount of winter wheat fertilizer
Winter wheat needs more fertilizer. For every 50 kg of wheat produced, it needs to absorb 1.4-1.6 kg of nitrogen, 0.5-0.75 kg of phosphorus, 1.5-2 kg of potassium, and the ratio of nitrogen, phosphorus and potassium is about 1:0.33:1. According to the cultivation of varieties, soil, climate and other conditions vary. According to the analysis of wheat plants, 412 kilograms of winter wheat per mu yields about 40% of total nitrogen in the joint growth period from emergence, tillering, and uptake after winter, and phosphorus and potassium account for 20% of the total. By the flowering stage, about 48% of the total nitrogen was absorbed, 67% of the total phosphorus, and 65% of the total potassium.