SIR I AM AN INDIAN NATIONAL
LIVING IN THE SEMI ARID REGION OF INDIA.
WE ARE HAVING SOIL TYPE SILTY CLAY LOAM WITH PH 8.6
WE ARE HAVING LEMON PLANTATION OF ABOUT 2200 PLANTS.WE INTEND TO SUPPLY
ORGANIC MANURE TO THIS
PLANT POPULATION OF OURS.
OUR LAND CONSULTANT HAS SUGGESTED A ANCIENT METHOD OF PREPAIRING ORGANIC
MANURE AS FOLLOWS.
1)TAKE A EMPTY TANK OF 200 Lit SIZE (PREFERABLY OF TIN) ADD TO IT 60 Kgs OF
FRESH COW DUNG.
2)ADD 3 Kgs OF UREA TO THIS
3) ADD 2 Kgs OF SINGLE SUPER PHOSPHATE TO IT.
4) ADD 2 Kgs OF MURET OF POTASH TO IT.
5)ADD WATER IN THE REMAINING SPACE & MAKE THE VOLUME TO 200 LITERS.
KEEP THIS MIXTURE FOR 72 HOURS .AS IT IS.
AFTER THAT SPREAD IT NEAR THE WORKING ROOT ZONE OF THE PLANTS.
NOW OUR PROBLM IS WILL IT SUPPLY THE REQUIREMENT OF THE FULL GROWN
PLANTS.HOW MUCH OF THIS MIXTURE WILL BE REQUIRED TO SATISY THE NEED OF THE
FULL GROWN CITRUS PLANTS.WHAT KIND OF THE MICROBIAL
GROWTH WILL BE THERE.WHAT KIND OF MICROBES WILL GROW IN THE SOIL AFTER
THIS.WILL IT HAVE ANY HARMFUL
EFECT ON THE PLANTS.WILL SOIL PH BE IMPROVED.CAN IT HELP IN QUALITY
PRODUCTION OF THE CITRUS.
PLEASE ADVISE US IN THIS MATTER.
YOUR ADVICE WILL BE HIGHLY ENLIGHTENING TO US.
THANKING YOU IN AN ANTICIPATION.
A D Mahajan
Your recipe is not organic as superphosphate and potash are used. Alternatives would need to be found.
The pH of the soil is very high for citrus growing. It should be lowered to below 8 (otherwise iron deficiency is very likely to occur). The pH of the fertiliser mixture needs to be tested. It would be good if it was around 5-6, as it would help with lowering the existing pH.
Mature citrus trees require (each per year, given in two applications, one in spring (2/3rd) and one in autumn (1/3rd):
0.4kg of Nitrogen (N)
0.45kg of Phosphorus (P)
0.25 kg of Potassium (K)
Your mixture would provide a total of 2.4kg N, 0.5 kg P and 1.11 kg K. This is imbalanced - phosphorus needs to be six times higher and potassium needs to be slightly higher.
Provided this is done, the mix would be enough for six trees per year. The 2200 trees would need 366 containers loads!
Microbes should be fine, and will be encouraged. There is no reason to expect detrimental effects. What rootstock are the trees grafted on?
With good compost, biodynamic preparations and/or EM (effective micro-organisms), the soil life can be so stimulated that the fertiliser replacements used in our calculation are not needed in such a large amount. However, ultimately, even with biodynamic preparations, one would mine the soil if not replacing what is taken out.