تلخیص
In Pakistan, phosphate fertilizers are applied manually on soil surface and ploughed down before crop sowing. This practice results in uneven distribution of fertilizer, thereby effecting P utilization efficiency of the crop due to restricted movement of P in soil. By the time, seed germinates and develops its roots, most of the applied P gets fixed in the soil or changes into less soluble forms (7). Soil application of plant nutrients have been made through irrigation water and the practice is termed as fertigation in modern fertilizer technology (3). The advantages of fertigation include saving in labour and energy as well as application of nutrients synchronized with the need of the plant during the growth period. Injection of N alone or with K through irrigation water is a common practice in U.S.A. and many other countries (2, 4, 5). However, no information regarding application of P fertilizer through irrigation water is available. The present paper reports on the comparison of conventional surface application of P and its application in irrigation water.
A. Latif* , S.M. Alam, , A. Hamid , M. Sharif. . (1991) COMPARISON OF P FERTILIZER AND THEIR APPLICATION METHODS FOR MAIZE CROPS, The Journal Soil & Environment , Volume 6, Issue(1-2).
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