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Grape Nutrition - Why Fertigation

Jul 29, 2016

Why Fertigation?


Grapes are grown in the areas where evapo-transpiration is higher than precipitation and irrigation become essential for higher crop production. Due to the scarcity of irrigation water, irrigation in grape is mainly done by micro irrigation system (drip system) and only less than 10 percent of the grape cultivated area is irrigated through surface method of irrigation.


Fertigation gave an opportunity to maximize fertilizer use efficiency:

1. Maintain proper soil moisture near root zone of plant when it's in most need.

2. Supply the major as well as minor elements in same solution and at same time.

3. Make nutrients available to the plant where it's needed.

4. Supply the nutrients amount according to crop hunger.

5. Supply the nutrients when plant requires most.


 Solubility of fertilizer compounds (g/L), at some temperature

Fertilizer
Formula

0

10

20

30

Urea

CO(NH2)2

680
850
1060
1330
Calcium Nitrate

Ca(NO3)2

1020
1240
1294
1620
Ammonium Sulphate

(NH4)2SO4

706
730
750
780
Potassium Sulphate

K2SO4

70
90
110
130
Potassium Nitrate

KNO3

130
210
320
460
Mono-potassium Phosphate

KH2PO4

142
178
225
274
Mono-ammonium phosphate

NH4H2PO4

227
295
374
464
Magnesium Sulphate

MgSO4

260
308
356
405