Mono-granular compound fertilizer acting slow release for the crops under vinyl mulching cultivation, 1; effect of formulation and granulation on slow release
1987
Shin, J.S. | Lim, D.K. | Seong, K.S. (Rural Development Administration, Suwon (Korea R.). Agricultural Sciences Inst.) | Kim, B.J. (Yeongnam Univ, Kyongsan (Korea R.))
Medium grade monogranular compound fertilizers for the crops under vinyl mulching cultivation were f2048ormulated using the principal materials of urea, DAP and MOP in combination with various fillers of zeolite, gypsum and treated human waste and granulated with waste liquid of glutamic acid fermentation as binder. The ratios of N-P2O5-K2O of trial products were 12-10-11.5 for red pepper, 8-8-6 for sesame and 4-9-14 for peanut. The rate of dissolution of trial product was comparatively low in water. The product for red pepper had N dissolution rate of 80 % during 24 hrs. 70 for peanut and 55 for sesame. The optimum dissolution rate has reported to be 50 % by the standard laboratory dissolution test for 24 hrs. in water. Therefore, the slowly released characteristics were obtained with the products that had 24 hrs. dissolution of 70 to 60 %. One time basal application of trial products could readily be justified under mulching cultiva
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