栽培者必須準(zhǔn)備使用一系列的化學(xué)藥劑.Growers must be prepared to use a range of chemicals.栽培者就再也不能完全控制營(yíng)養(yǎng)狀況.The grower is no longer in full control of the nutritional situation.用專(zhuān)利品來(lái)表示使用劑量對(duì)栽培者來(lái)說(shuō)最有意義.Doses presented in terms of the proprieta...