Northwest region includes six provinces (autonomous regions), i.e. Inner Mongolia (IMAR), Shaanxi, Gansu, Qinghai, Ningxia and Xinjiang. It has a vast land area which accounts for about 45% of China total territory....
The role of K in vegetable production in Qinghai province
With the increased demand for vegetables in Qinghai province, the planting area has increased rapidly. In 2006 the planting area of vegetables in Qinghai was 27,700 ha which is 7.1% more than that in 2005. The total production of vegetable is now about 1.0 million tonnes......
The importance of K in crop yield and nutrient use efficiency
Farmers usually apply more P than K in crop production, most probably because of an assumed lower availability of P in soils and a lack of demonstrated K deficiencies. Attention must be paid to nutrient management practices that focus on improving P use efficiency using K in balance to addressing this. Below are some examples that showed crop responses to potash in soils with higher available soil P levels.
