Results Of Field Experiments In PAILIN - CARE

Results Of Field Results Of Field Experiments In PAILIN - Experiments In PAILIN - CARECARE

Presented by Mr Touch Van

The CARE Project Team

Mr Em Sophoeun, Mr Sok Sea, Mr Touch Van, and Mr Li Bunthoeun

Field Trials In MWS 2008

Maize Fertiliser Trials Legume Rhizobium Trials

Rhizobium inoculation of soybean, mungbean and peanut

What We DidWhat We Did

Four Legume Rhizobium Trials located in 4 villages, one in each cluster:

Bortaisour O’ra el Spong Presantas

TreatmentsTreatmentsUrea at 87 kg/ha = 40 kg/ha N.

Treatment No.

Crop Rhizobium

1 Soybean Nil rhizobium

2 Soybean Plus rhizobium

3 Soybean Urea 87 kg/ha

4 Mungbean Nil rhizobium

5 Mungbean Plus rhizobium

6 Mungbean Urea 87 kg/ha

7 Peanut Nil rhizobium

8 Peanut Plus rhizobium

9 Peanut Urea 87 kg/ha

Results

Soybean failed due to poor seed The response to N was variable There was a significant positive

response to RH for MB and PN at all sites

Effect of rhizobium inoculation on yield of mungbean and peanut

0

1

2

3

4

5

6

7

MB PN

t/h

a

-RH +RH

30% increase

15% increase

Maize Trials

What we didWhat we did Four Maize Nitrogen Trials located in 4 villages, one in each cluster :

Bortaisour O’ra el Spong Presantas

Maize Maize treatmentstreatments

Topdressing 1 Topdressing 2

0 0

25 0

50 0

75 0

100 0

0 25

0 50

0 75

0 100

25 25

37.5 37.5

50 50

Maize yield resultsMaize yield results

The response to N was inconsistent and variable

The late topdressing was applied too late

Soil nitrate tests should be used to select low fertility sites for trials

4

5

6

7

8

9

10

11

12

Control 25E 50E 75E 100E

Rate of Urea

t/ha

cob

Lessons learnt: Lessons learnt: legumelegume

Soybean Need certified and good seeds Need pesticide to protect while the flowering & fruiting

Mungbean Rain can affect grain quality (Disease problems) Difficult to harvest in a couple of different times

Peanut Late to harvest, some peanut seeds can germinate in the ground Difficult to harvest and require high labours (150 persons/day)

Lessons learnt: Lessons learnt: maizemaize

Weed management (Timing, technique)

Water logging (one site affected by water logging)

Urea Application (2nd time application seem to be late) (Low response to Urea because soil fertility seems

to be high)

What next – EWS What next – EWS 20092009

Baseline soil survey (50 farm fields) Continue rhizobium trials – 4 sites

(replicated, otherwise same design as 2008) Maize nitrogen trials – 4 sites

(replicated, more rates, early topdressing only) Long-term rotation experiment – 1 site:

1. Continuous maize – exploitive local practice2. Continuous maize – chemical fertiliser3. Mungbean (EWS) Maize (MWS) – biological system 14. Maize (EWS) Soybean (MWS) – biological system 2

Thank you