"Effect of Ammonium Polyphosphate and Diammonium Orthophosphate on the Availability of Zinc to Wheat on Soils Varying in Calcium Carbonate" 【作 者】N.K. TOMAR;R.S. PUNDIR;U.V. SINGH 【刊 名】Journal of the Indian Society of Soil Science 【出版日期】2003 【卷 号】Vol.51 【期 号】NO.2 【页 码】169-173