Until the localfertilizer company in west Texas blew up last month and demolished scores of homes, many in that town didn't know what chemicals were stored there.
In a word, we conclude that (1) : the soil fertility level was greatly influenced by the Long-term local addition of fertilizer, especially by the farmyard manure.
总之，我们可以得出以下结论：(1)：长期不同施肥对土壤肥力水平影响很大，尤其是长期施加厩肥。
3
According to the local soil characteristics, the optimal P fertilizer application rate was also calculated.