npk

The ratio of loosely / tightly combined humus tended to decrease after a long-term application of organic fertilizer , being the lowest ( 1.10 ) in the treatment of organic fertilizer plus chemical NPK .

长期定位施用有机肥后保护地土壤松/紧比值呈降低趋势，其中有机肥与氮磷钾肥配施处理的松紧比值最低，为1·10。

Effect of NPK fertilizer application on the yield of sweet potato

氮磷钾肥配合施用对甘薯的增产效果

How to improve the quality of S based NPK compound fertilizer

如何提高S-NPK复合肥产品质量

Study on NPK application model of high yield for cluster red pepper

天鹰椒氮磷钾高产施肥模型研究

Production of High Analysis NPK Compound Fertilizer with Filter Acid

稀磷酸生产高浓度NPK复合肥料

NPK treatment had higher soil total N content than that of N treatment .

氮磷钾化肥配合施用，土壤的全氮含量高于长期单施氮肥的处理；

A study of the effects of combined application of NPK on the yield and quality of

NPK配施对莴苣产量品质的影响研究

Results indicated that NPK fertilizer was a major factor .

结果表明：氮磷钾肥是主要的影响因素；

Research on NPK nutrients and rational fertilization technique in China

我国氮磷钾养分与合理施肥技术的研究

Study of Technology for Manufacture of Urea Based NPK Compound Fertilizer by Melt Process

熔体法制尿基NPK复混肥的工艺研究

Research on Fertilization of Soil Testing and NPK Fertilizer Development and Production of Dedicated

测土施肥研究及NPK专用肥开发生产通用谷物肥料条播机

Trial to Produce High analysis NPK Fertilizer in Slurry AP Facility

料浆法小磷铵装置改产高浓度三元复合肥的试验

Preliminary studies on calculating ratio of NPK to Chinese Cabbage

采用施肥比计算大白菜施肥量的初步研究

Effect of NPK fertilizer management on protein and amino acid contents of rice grain

氮磷钾肥运筹对水稻子粒蛋白质和氨基酸含量的影响

The dosage of NPK fertilizer in soybean at black soil area

黑土区大豆适宜NPK肥料用量研究

Effect of NPK fertilized on cotton fiber quality in purple soils

紫色土施氮磷钾对棉花纤维品质的影响

The Research on Optimal NPK Dosage in Soybean-Corn Rotation System TESTING

大豆-玉米轮作区适宜NPK用量试验研究

As a result , in the experiments , the best NPK ratio was 1:2:1.2 .

综合各项指标，在本试验条件下，以氮磷钾配比1：2：1.2的处理表现最佳。

Study on the NPK nutrient balance of cultivated soils in Quanzhou

泉州市耕地土壤氮磷钾养分平衡研究

Function of amines in coating of NPK fertilizer and their fluorescent effect

胺片在NPK油包裹中的作用及其荧光反应

Production Plant of 600 kt / a NPK Compound Fertilizer

600kt/aNPK复合肥生产装置

NPK was classified by the method of induction .

运用归纳分类法，将介词后NPK成分进行分类研究；

Study on relation among product of flax and different density , amount of nitrogen , NPK ratio

不同播种密度、不同N肥用量及不同NPK比例与亚麻产量的关系

Technical Transformation and Economic Evaluation of 10 Ton t / a NPK Compound Fertilizer Plant

10万ta尿基NPK复合肥装置技术改造及经济技术评价

Studies on the NPK Accumulation and Transfer in High Yielding Colony of Hybrid Rice

杂交稻高产群体的氮磷钾素积累运转

Study on Economic NPK - requirements for Medicinal Safflower

药用红花经济施肥量研究

Preliminary Study On the Application in Fertilizer Technique of NPK for Production and Quality of Licorice Root

提高人工栽培甘草产量和质量的氮磷钾施肥技术初步研究

Discussion on pollution criterion of NPK fertilizer plant

对复合肥厂污染物排放标准的探讨

Causes and Solution of High Concentrations of Compound Fertilizer ( NPK ) Caking

高浓度复合肥（NPK）结块原因及对策研究

Effect of Combination of NPK Chemical Fertilizer and Different Organic Materials on Crop Yield and Soil Organic Matter

化肥与有机物料配施对作物产量及土壤有机质的影响