Primer on fer­til­iz­ers and plant nu­tri­tion

Agriculture - - Contents -

A COM­PANY that dis­trib­utes var­i­ous bios­tim­u­lants that pro­mote healthy plant growth has come up with a very use­ful primer about fer­til­iz­ers and nu­tri­tional re­quire­ments of var­i­ous crops. The primer is ti­tled “Com­plete Plant Nu­tri­tion With Stress Man­age­ment Tech­nol­ogy” pub­lished by Zetryl Chem Philip­pines headed by Dan­ton B. Pa­jar­il­laga, pres­i­dent and gen­eral man­ager.

Top­ics in­clude What Is Fer­til­izer?; Nu­tri­tional Re­quire­ments of Plants; Tra­di­tional/Macro/ NPK – First Group; Mi­cronu­tri­ents/Trace El­e­ments – Sec­ond Group; What Is Soil pH?; Plant Stress – Bi­otic and Abi­otic; The Plant Dis­ease Tri­an­gle; and Fungi, Bac­te­ria, Virus and Ne­ma­todes.

The top­ics are ex­plained in very sim­ple, un­der­stand­able man­ner so the reader can eas­ily ap­pre­ci­ate them. The texts are ac­com­pa­nied with color pho­tos and il­lus­tra­tions for eas­ier com­pre­hen­sion and ap­pre­ci­a­tion.

The func­tions of the ma­jor fer­til­izer el­e­ments as well as the mi­cronu­tri­ents are pre­sented in both English and Ta­ga­log. For in­stance, what hap­pens when there is a de­fi­ciency of one trace el­e­ment, is shown with an ac­com­pa­ny­ing pic­ture or il­lus­tra­tion.

In the dis­cus­sion of soil pH (de­gree of acid­ity or al­ka­lin­ity), the ideal pH for each of most com­monly grown crops is given. Then there is a graphic pre­sen­ta­tion on how a low soil pH can make fer­til­iz­ers in­ef­fec­tive. For in­stance, if the soil pH is 4.5 which is ex­tremely acidic, only 30% of the ni­tro­gen ap­plied will be ab­sorbed. In the case of phos­pho­rus, only 23% will be ab­sorbed; and only 33% in the case of potas­sium. So it is very im­por­tant to know the soil pH be­fore ap­ply­ing fer­til­izer. When the pH is 7.0, which is neu­tral, all the ni­tro­gen, phos­pho­rus and potas­sium ap­plied will be ab­sorbed by the plants. Dif­fer­ent crops, how­ever, have their ideal soil pH lev­els and are listed in the primer.

There’s an in­ter­est­ing part in the primer which stresses that one should un­der­stand how cer­tain nu­tri­ents re­act with each other. It states that not all de­fi­cien­cies are caused by a lack of nu­tri­ents. For ex­am­ple, Cal­cium de­fi­ciency may be di­ag­nosed as due to low cal­cium lev­els or be­cause there are high lev­els of Ni­trates (NO ). Ni­trates ‘push’ Cal­cium away and can block ab­sorp­tion.

So, what to do? The primer ad­vises that one should use or­ganic Ni­tro­gen in­stead of in­or­ganic Ni­tro­gen which is high in Ni­trates. Many mod­ern syn­thetic fer­til­iz­ers con­tain pri­mary Ni­trates or other salt-based forms of ni­tro­gen. The salts are the most com­mon cause of tip burn, nu­tri­ent an­tag­o­nism, and weak plant growth.

There are many more use­ful info that you will learn from the primer. For a free copy, con­tact Harold Hazel Larete at 0917 816-1909.

Con­tact Harold Larete at 0917 816-1909 for a free copy of this primer.

Dan­ton B. Pa­jar­il­laga pub­lished the free primer.

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